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OBJECTIVE: To evaluate the outcome of presurgical nasoalveolar molding therapy in the treatment of patients with bilateral cleft lip and palate. DESIGN: A prospective study with blinded measurements. SETTING: The Cleft and Craniofacial Clinic at the University of Texas at Houston Medical School, Houston, Texas. PATIENTS: Eight patients with bilateral cleft lip and palate, treated between 2002 and 2004. INTERVENTIONS: The starting age for presurgical nasoalveolar molding therapy was 34.9 days and the average length of the therapy was 212.5 days. MAIN OUTCOME MEASURES: Measurements of intraoral and extraoral casts were performed, and statistical analyses were used to compare the differences between measurements before and after therapy. RESULTS: Intraoral measurements demonstrated that there was a statistically significant reduction of the premaxillary protrusion and deviation. There was also a significant reduction in the width of the larger cleft. Extraoral measurements revealed that there was a significant increase in the bi-alar width and in the columellar length and width. Moreover, there was a significant improvement in columellar deviation. Finally, the nostril heights of both sides were increased. CONCLUSION: The authors have quantitatively shown that presurgical nasoalveolar molding therapy has significant advantages in the treatment of bilateral cleft lip and palate patients. It improves the nasal asymmetry and deficient nasal tip projection associated with bilateral cleft lip and palate. It also forces the protruded premaxillary segment into alignment with the dental alveolar segments, improving the shape of the maxillary arch. As a result, the changes associated with presurgical nasoalveolar molding therapy help decrease the complexity of subsequent surgeries. [ABSTRACT FROM AUTHOR]

Introduction: Endoscopic strip craniectomy (ESC) is a minimally invasive option for early surgical treatment of metopic (MC) and sagittal craniosynostosis (SC). For ESC, however, the postoperative duration and compliance of helmet therapy are crucial to correct MC and SC asymmetry. The purpose of this study is to assess the period of postoperative band therapy and determine differences, if any, between MC and SC., Methods: A single-institution retrospective review was performed for patients with MC and SC who underwent ESC from November 2015 to 2019. Patients received preoperative, postoperative, and post-band 3-dimensional imaging. Factors recorded included patient sex, insurance type, number of helmets needed, age at surgery, time of first helmet, and at time of completion of helmet therapy, cephalic index, interfrontal angle, and cranial vault asymmetry index., Results: Patients with SC and MC had ESC surgery at 3.3 and 3.4 months of age, respectively.Patients with SC were found to have completed banding therapy at a younger age (7.88 versus 10.0 mo), with shorter duration (4.17 versus 6.00 mo), and less number of bands (1.54 versus 2.21) than patients with MC. After regression analysis, suture type was found to be a significant predictor of total time in band therapy ( P =0.039) with MC requiring a longer duration of banding therapy when compared with SC., Conclusions: Suture type directly correlates with duration of helmeting therapy for patients, with patients with MC requiring longer periods of postop helmeting and increased number of bands as compared with SC., Competing Interests: T.L. is the chief scientific officer of Cranial Technologies, although did not receive any compensation for this project. Cranial Technologies provided postoperative helmeting and anthropometric raw data. The remaining authors report no conflicts of interest., (Copyright © 2023 by Mutaz B. Habal, MD.)

Summary: Velopharyngeal insufficiency (VPI) is a complication following primary palatoplasty that can lead to hypernasality of the voice and other speech problems. The conversion Furlow palatoplasty for VPI can be performed with the addition of buccal flaps to provide additional tissue for palatal repair. In this study, the authors aimed to determine the effectiveness of buccal flaps with conversion Furlow palatoplasty in secondary management of VPI. A retrospective review of patients undergoing surgical repair of VPI between 2016 and 2020 was performed. Patients underwent either conversion Furlow palatoplasty alone (FA) or conversion Furlow palatoplasty with buccal flaps (FB) for VPI after primary straight-line repair of the palate. The authors reviewed medical records to collect demographics, operative information, and preoperative and postoperative speech scores. Of the 77 patients in the study, 16 (21%) had a revision that incorporated buccal flaps. The median age at cleft palate revision surgery was 8.97 years in the FA group and 7.96 years in the FB group ( P = 0.337). In the FA group, four patients (7%) developed a postoperative fistula, compared with zero patients in the FB group. The average time to follow-up after revision surgery was 3.4 years (range, 7 months to 5.9 years). Both cohorts demonstrated a decrease in hypernasality and total parameter scores postoperatively. The use of buccal flaps in revision Furlow palatoplasty could decrease the risk for postoperative complications. The use of data from a larger patient population from multiple institutions is warranted to determine true significance., Clinical Question/level of Evidence: Therapeutic, III., (Copyright © 2023 by the American Society of Plastic Surgeons.)

Objective: Velopharyngeal insufficiency (VPI) remains a known complication of primary palatoplasty. We sought to identify factors associated with the incidence of VPI and create a predictive model for VPI development in our population., Design: A single-institution, retrospective review., Setting: Multidisciplinary clinic in a tertiary academic institution., Patients: A total of 453 consecutive patients undergoing primary palatoplasty from 1999 to 2016 were reviewed. Inclusion required follow-up past age 5. Patients who were non-verbal, and thus unable to undergo speech evaluation, were excluded., Main Outcome Measures: Primary outcome was VPI, defined as revision palatoplasty or recommendation by speech-language pathology., Results: Of 318 patients included, 179 (56%) were male. Median age at primary repair was 1.0 years (0.9-1.1) with a median age of 8.8 years at last follow-up. One hundred nineteen (37%) patients developed VPI at a median age of 5.0 years (3.8-6.5). Higher rates were seen with posterior fistula (65% vs 14%, P <.01) and straight-line repair (41% vs 9%, P <.01), with lower rates in patients with Veau I clefts (22% vs 39%, P <.05). Patients with VPI were older at last follow-up. Following multivariate regression, factors remaining significant were posterior fistula (odds ratio [OR]: 11.3, 95% CI: 6.1-22.0), primary Furlow repair (OR: 0.18, 95% CI: 0.03-0.68), genetic diagnoses (OR: 2.92, 95% CI: 1.1-7.9), and age at last follow-up (OR: 1.11, 95% CI: 1.01-1.2)., Conclusions: Length of follow-up, posterior fistulae, and genetic diagnoses are associated with VPI formation. Furlow repair may protect against formation of VPI. Use of allograft, Veau class, birth type, birth weight, and race are not independently associated with VPI formation.

Background: Most literature regarding traumatic Le Fort or maxillary fractures exists in the adult population, with limited information regarding the epidemiology and management of pediatric fractures. The purpose of this study was to evaluate fracture mechanism, surgical management, and associated injuries in pediatric patients with Le Fort fractures., Methods: A retrospective chart analysis of all pediatric patients age ≤18 years diagnosed with facial fractures at a single level 1 trauma center over a 10-year period (January 2006-December 2015) was performed. Demographics, fracture location, mechanism of injury, and hospital course were abstracted as well as associated injuries and need for operative management., Results: A total of 1274 patients met inclusion criteria. Sixty-nine (5.4%) presented with Le Fort fractures. Factors associated with Le Fort fractures included motor vehicle collisions (P < 0.001), increased age (P < 0.001), and traumatic brain injury (P < 0.04). Patients with Le Fort fractures were more likely to need intensive care unit admission (P < 0.001), surgical management (P < 0.001), transfusions (P < 0.001), secondary fixation surgery (P < 0.001), and have a longer length of stay (P < 0.001). Multivariate showed increased odds for increased age (OR 1.1; 95%CI 1.04-1.17) and concomitant orbit fractures (OR 8.33; 95%CI 4.08-19.34). Decreased odds were associated for all mechanisms of injury other than motor vehicle collisions (Other blunt trauma: OR 0.36; 95%CI 0.2-0.6. Penetrating trauma: OR 0.13; 95%CI 0.01-0.6)., Conclusion: Maxillary or Le Fort fractures represent a small portion of pediatric facial fractures but require high rates of operative management. The high velocity required to create this fracture type is associated with significant traumatic comorbidities, which can complicate the hospital course., Competing Interests: The authors report no conflicts of interest., (Copyright © 2020 by Mutaz B. Habal, MD.)

Abstract: Congenital cardiac comorbidities represent a potentially elevated risk for complications in patients undergoing cleft lip repair. National databases, such as the National Surgical Quality Improvement Program Pediatric (NSQIP-P) allow for analysis of large national datasets to assess these risks and potential complications. The aim of this study is to assess the risk of complications in patients undergoing cleft lip repair with congenital cardiac co-morbidities using the NSQIP-P.The 2012 to 2014 NSQIP-P databases were queried for patients undergoing cleft lip repair. Data abstracted for analysis included demographic, clinical, and outcomes data. Patients with cleft lip were stratified based on the presence or absence of congenital cardiac comorbidities. Univariate analysis and step-wise, forward logistic regression were performed to compare these groups.Nationally, between 2012 and 2014, 2126 patients underwent cleft lip repair, 227 with cardiac disease, and 1899 without cardiac disease. Weights were similar between the groups at the time of surgery, though patients with cardiac comorbidities were older. Postoperatively, cardiac disease patients were more likely to experience an adverse event. Specifically, they were more likely to experience reintubation, reoperation, longer length of stay, and death. Rates of surgical site infection and dehiscence were not different between the groups.This study demonstrates that cleft lip repair in patients with congenital heart defects is safe. However, patients undergoing cleft lip repair with comorbid congenital cardiac disease were more likely to experience adverse events. Cardiac patients require special preoperative evaluation before repair of their cleft lip, but do not appear to experience worse wound-related outcomes., Competing Interests: The authors report no conflicts of interest., (Copyright © 2020 by Mutaz B. Habal, MD.)

Background: Enhanced recovery after surgery (ERAS) protocols have been adopted for many types of surgery. Postoperative pain following palatoplasty may cause feeding and swallowing difficulty. Our study evaluated the use of ERAS protocols to improve the management of pain following primary palatoplasty as well as in the transition of care from inpatient to outpatient., Methods: An Institutional Review Board approved retrospective analysis was performed for patients who previously underwent primary palatoplasty before ERAS implementation. Separately, an Institutional Review Board approved prospective trial of patients undergoing primary palatoplasty was performed and these patients were managed with ERAS protocols. Data were obtained for length of stay, pain scale scores, milligrams of morphine administered, and inpatient readmissions/emergency department visits. Outpatient medication logs were used to follow pain medicine usage, and a satisfaction survey was administered at the first postoperative visit., Results: Data were obtained retrospectively for 56 patients and prospectively for 57 patients who underwent primary palatoplasty. Patients in the ERAS protocol received significantly less milligrams of morphine on postoperative day 1 through day 4 than those patients in the usual care group P < 0.05. No significant difference was observed for length of stay, oral intake prior to discharge, or inpatient face, legs, activity, cry, consolability pain scale scores. Outpatient medication logs showed a continued decrease in narcotic usage at home with no spike post discharge day 1. Parents reported high satisfaction levels for inpatient pain management (4.66 ± 0.49) and even higher satisfaction levels for understanding (5.0 ± 0) and management of pain at home (4.92 ± 0.29). Return visits to the hospital for pain management following primary palatoplasty decreased from 7.1% (4) following the previous protocol to 0% with the new ERAS protocol (P = 0.057)., Conclusion: The ERAS protocols provide improved inpatient pain management following primary palatoplasty as evidence by decreased total narcotic pain medication usage. The use of multimodality therapy and increased patient education regarding non-narcotic medications can improve the transition of care from inpatient to outpatient, without sacrificing patient/parent satisfaction. The results of this study merit future study into more restricted use of opioid pain medications with greater emphasis on the use of multimodal therapeutics as primary agents as opposed to adjuncts., Competing Interests: The author reports no conflicts of interest., (Copyright © 2020 by Mutaz B. Habal, MD.)

Background: Both open cranial vault remodeling (CVR) and endoscopic suturectomy are effective in treating the anatomical deformity of craniosynostosis. While parents are increasingly knowledgeable about these 2 treatment options, information regarding the perioperative outcomes remains qualitative. This makes preoperative counseling regarding surgical choices difficult. The purpose of this study was to evaluate the outcomes in patients with craniosynostosis who underwent traditional CVR versus endoscopic suturectomy., Methods: Open and endoscopic craniosynostosis surgeries performed at our institution from January 2014 through December 2018 were retrospectively reviewed and perioperative data, including operative time, estimated blood loss, transfusion rate and length of stay, was analyzed. A student t test was used with significance determined at P < 0.05., Results: CVR was performed for 51 children while 33 underwent endoscopic procedures. Endoscopic suturectomy was performed on younger patients (3.8 versus 14.0 months, P < 0.001), had shorter operative time (70 versus 232 minutes, P < 0.001), shorter total anesthesia time (175 versus 352 minutes, P < 0.001), lower estimated blood loss (10 versus 28 ml/kg, P < 0.001), lower percentage transfused (42% versus 98%, P < 0.001), lower transfusion volume (22 versus 48 ml/kg, P < 0.001), and shorter length of stay (1.8 versus 4.1 days, P < 0.001) when compared to open CVR., Conclusion: Both open CVR and endoscopic suturectomy are effective in treating deformities due to craniosynostosis. The endoscopic suturectomy had significantly shorter operative and anesthesia time as well as overall and PICU length of stay. CVR was associated with greater intraoperative blood loss and more frequently required higher rates of blood transfusions.

Pediatric cervical spine injuries (CSI) are uncommon events, but can be devastating injuries. Facial fractures have been associated with injuries to the cervical spine in children, but may be deemed isolated facial fractures and bypass the standard trauma pathway. The objective of this study is to describe the mechanisms, associated injuries and outcomes of pediatric cervical spine injuries in patients with known maxillofacial trauma at a level 1 trauma center. An analysis was performed of all patients under the age of 18 with maxillofacial trauma admissions to a single level 1 trauma center, from 2006 to 2015. Patients were stratified based on the presence or absence of a cervical spine injury. Data was abstracted to include demographic, mechanism and clinical outcomes data. There were 1274 patients who were admitted with maxillofacial trauma during the study period. Of these, 72 (5.7%) experienced a cervical spine injury. Factors associated with cervical spine injuries include older age and penetrating mechanism. Cervical spine injuries were associated with concomitant traumatic brain injuries and skull fractures. Patients with spine injuries were more like to experience a longer length of stay and death. On multivariate analysis, only increased age predicted CSI. Our database demonstrated a 5.7% incidence of pediatric cervical spine injuries in patients with maxillofacial trauma. This incidence is higher than previously published reports of smaller cohorts. Clinicians must take care to stabilize the cervical spine in any patient with facial fractures, especially during work up and diagnostic maneuvers performed before spinal injuries are ruled out.

Nonsyndromic cleft lip and palate (NSCLP) is one of the most common craniofacial anomalies in humans, affecting more than 135,000 newborns worldwide. NSCLP has a multifactorial etiology with more than 50 genes postulated to play an etiologic role. The genetic pathway comprised of Pbx-Wnt-p63-Irf6 genes was shown to control facial morphogenesis in mice and proposed as a regulatory pathway for NSCLP. Based on these findings, we investigated whether variation in PBX1, PBX2, and TP63, and their proposed interactions were associated with NSCLP. Fourteen single nucleotide variants (SNVs) in/nearby PBX1, PBX2, and TP63 were genotyped in 780 NSCLP families of nonHispanic white (NHW) and Hispanic ethnicities. Family-based association tests were performed for individual SNVs stratified by ethnicity and family history of NSCLP. Gene-gene interactions were also tested. A significant association was found for PBX2 rs3131300 and NSCLP in combined Hispanic families (p = .003) while nominal association was found for TP63 rs9332461 in multiplex Hispanic families (p = .005). Significant haplotype associations were observed for PBX2 in NHW (p = .0002) and Hispanic families (p = .003), and for TP63 in multiplex Hispanic families (.003). An independent case-control group was used to validate findings, and significant associations were found with PBX1 rs6426870 (p = .007) and TP63 rs9332461 (p = .03). Gene-gene interactions were detected between PBX1/PBX2/TP63 with IRF6 in NHW families, and between PBX1 with WNT9B in both NHW and Hispanic families (p < .0018). This study provides the first evidence for a role of PBX1 and PBX2, additional evidence for the role of TP63, and support for the proposed PBX-WNT-TP63-IRF6 regulatory pathway in the etiology of NSCLP., (© 2019 Wiley Periodicals, Inc.)

Introduction: Pediatric facial fractures due to intentionally violent mechanisms represent a unique subset of facial fractures. The objective of our research is to identify how violence affects patterns of facial fractures and their management in pediatric patients., Methods: An IRB approved, retrospective study of our institution's pediatric patients ≤18 years of age who presented with ≥1 facial fracture due to violence from January 2006 to December 2015 was performed. Violence was defined as trauma intended to hurt another or self. Demographics, fractures, mechanism, concomitant injuries, and management were analyzed., Results: The 1274 patients were diagnosed with facial fractures, with 235 of these due to violence (18%). These patients of violence (POV) had 332 fractures, with an average fracture per patient of 1.4 ± .0.8. The majority (86%) were male, Non-Hispanic African American (35%), and the average age was 15.9 ± 2.8 years. The most common fracture was the mandible (50% of patients) and most common mechanism was assault (76%). The POV were older, male, and of minority race/ethnic groups when compared to patients of non-violence (PONV) (P <0.01). The POV presented with fewer concomitant injuries, were less likely to be admitted to the intensive care unit, and more often surgically managed when compared to the PONV (P <0.01)., Conclusion: This study represents the largest US, single institution, Level 1 trauma center study of pediatric facial fractures. Pediatric patients with facial fractures due to a violent mechanism represent a distinct category of trauma patients with a unique profile of injuries.

Objective: Evaluate the factors that influence caregiver-reported completion of nasoalveolar molding (NAM) therapy for patients with cleft lip and palate., Design: An IRB-approved 30-question survey., Setting: Outpatient clinic for patients with cleft lip., Patients: Patients with unilateral or bilateral cleft lip treated with NAM therapy., Interventions: Survey of previous experiences., Main Outcome Measure(s): Rate of noncompletion for patients initiating NAM therapy and identifiable causes., Results: Of 94 patients who underwent NAM, 13 (13.8%) failed to complete NAM therapy. Reasons for incomplete treatment included: obstructive sleep apnea, device intolerance, tape issues, and lack of support. Patients who did not complete NAM therapy were less likely to have primary caregivers >30-year old ( P = .045) and more likely to be the first child for the family ( P = .021) and have a bilateral cleft ( P = .03). Caregivers of NAM patients were less satisfied with the outcome ( P < .001) when they did not complete therapy., Conclusion: This study shows that a high number of parents fail to complete this therapy for many reasons, personal and medical. More data are needed to elucidate true prevalence of NAM noncompletion and to establish evidence-based guidelines to reduce barriers to care for completing NAM treatment.

Objective: To assess the risk of complication in patients undergoing cleft palate repair with congenital cardiac comorbidities in a large, national cohort., Design: Retrospective review., Patients/setting: Using the 2012-2014 National Surgical Quality Improvement Program (NSQIP) Pediatric database, patients undergoing cleft palate repair were selected for analysis. Patients with cleft palate repairs were stratified based on the presence or absence congenital cardiac comorbidities. Univariate and stepwise forward logistic regression were conducted., Main Outcome Measures: It is hypothesized that risk of postoperative adverse events in patients with congenital cardiac comorbidities is higher than in patients without cardiac disease., Results: Nationally, between 2012 and 2014, 3240 patients underwent cleft palate repair, 422 (13.0%) with cardiac disease, and 2818 (87.0%) without cardiac disease. Patients with cardiac disease were smaller (10.5 [6.6] kg vs 11.6 [8.6] kg, P < .01) and more likely to be premature (4.6% vs 13.0%, P < .01) compared to those without cardiac disease. Postoperatively, patients with cardiac conditions were more likely to experience an adverse event (8.8% vs 4.2%, P < .01). Specifically, they were more likely to experience reintubation (1.7% vs 0.4%, P < .01), reoperation (2.1% vs 0.6%, P < .01), and longer length of stay (2.7 [7.0] vs 1.6 [2.8] days, P < .01). Rates of surgical site infection and dehiscence were not different., Conclusions: Cleft palate repair in patients with concurrent congenital cardiac defects is a safe procedure but carries elevated risk in the postoperative period as demonstrated in this analysis of the NSQIP-Pediatric database. Technical risks are equivalent. Additional anesthesia and surgical awareness of these potential complications is essential to minimize perianesthesia risks.

Pediatric facial fractures present and are managed differently than the adult population. This study describes the pattern and mechanism of facial fractures in children and identifies factors associated with need for surgical management. An IRB-approved retrospective chart analysis of all pediatric patients age ≤ 18 years diagnosed with facial fractures at our level 1 trauma center over a 10-year period (January 2006-December 2015) was performed. Demographics, fracture location, mechanism of injury, concomitant head and neck injuries, and surgical management were reviewed. Statistical analysis was then performed comparing surgical and nonsurgical cohorts using univariate and multivariate analyses. One thousand two hundred seventy-four patients were diagnosed with facial fractures. Five hundred seventeen (40.6%) underwent surgical management. Two thousand one hundred seventy-two total facial fractures were recorded. Orbit fractures (29%) were the most commonly recorded, observed in 49% of patients presenting. Increased age was associated with increased odds of surgical management (OR 1.13; 95% CI 1.09-1.16). Mandible (OR 9.28; 95% CI 6.88-12.51) and Le Fort fractures (OR 19.73; 95% CI 9.78-39.77) had increased odds of surgical management. Patients with traumatic brain injury had reduced odds (OR 0.54; 95% CI 0.35-0.83) of surgical management for their facial fractures. Older pediatric patients may be more likely to require surgical management of their facial fractures, especially those with mandible or Le Fort fractures. Patients with traumatic brain injury are likely to sustain life threatening injuries, deferring repair of their facial fractures. Patient education and counseling, as well as predictive models, can be improved to reflect these data.

Purpose: It is easier to judge facial deformity when the patient's head is in anatomic position. The purposes of this study were to determine 1) whether a group of expert observers would agree more than a group of nonexperts on what is the correct anatomic position of the head, 2) whether there would be more variation in the alignment of an asymmetrical face compared with a symmetrical one, and 3) whether the alignments of experts would be more repeatable than those of nonexperts., Materials and Methods: Thirty-one orthodontists (experts) and 31 dental students (nonexperts) were recruited for this mixed-model study. They were shown randomly oriented 3-dimensional head photographs of an adult with a symmetrical face and an adolescent with an asymmetrical face. In viewing software, the observers oriented the images into anatomic position. They repeated the orientations 4 weeks later. Data were analyzed using a generalized linear model and Bland-Altman plots. The primary predictor variables were experience and symmetry status. The outcome variable was the anatomic position of the head. The other variables of interest included time and orientation direction., Results: There was a statistically significant difference between measurements completed by experts and nonexperts (F 1,60  = 14.83; P < .01). The interaction between expertise and symmetrical status showed a statistically significant difference between symmetrical and asymmetrical faces in the expert and nonexpert groups (F 1,60  = 9.93; P = .003). The interaction between expertise and time showed a statistically significant difference in measurement over time in the expert and nonexpert groups (F 1,60  = 4.66; P = .03)., Conclusions: The study shows that experts can set a head into anatomic position better than nonexperts. In addition, facial asymmetry has a profound effect on the ability of an observer to align a head in the correct anatomic position. Moreover, observer-guided alignment is not reproducible., (Copyright © 2018 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Orofacial development is a multifaceted process involving tightly regulated genetic signaling networks, that when perturbed, lead to orofacial abnormalities including cleft lip and/or cleft palate. We and others have shown an association between the cysteine-rich secretory protein LCCL domain containing 2 (CRISPLD2) gene and nonsyndromic cleft lip with or without cleft palate (NSCLP). Further, we demonstrated that knockdown of Crispld2 in zebrafish alters neural crest cell migration patterns resulting in abnormal jaw and palate development. In this study, we performed RNA profiling in zebrafish embryos and identified 249 differentially expressed genes following knockdown of Crispld2. In silico pathway analysis identified a network of seven genes previously implicated in orofacial development for which differential expression was validated in three of the seven genes (CASP8, FOS, and MMP2). Single nucleotide variant (SNV) genotyping of these three genes revealed significant associations between NSCLP and FOS/rs1046117 (GRCh38 chr14:g.75746690 T > C, p = 0.0005) in our nonHispanic white (NHW) families and MMP2/rs243836 (GRCh38 chr16:g.55534236 G > A; p = 0.002) in our Hispanic families. Nominal association was found between NSCLP and CASP8/rs3769825 (GRCh38 chr2:g.202111380 C > A; p < 0.007). Overtransmission of MMP2 haplotypes were identified in the Hispanic families (p < 0.002). Significant gene-gene interactions were identified for FOS-MMP2 in the NHW families and for CASP8-FOS in the NHW simplex family subgroup (p < 0.004). Additional in silico analysis revealed a novel gene regulatory network including five of these newly identified and 23 previously reported NSCLP genes. Our results demonstrate that animal models of orofacial clefting can be powerful tools to identify novel candidate genes and gene regulatory networks underlying NSCLP.

The purpose of this study was to produce reliable estimations of fluctuating facial asymmetry in a normal population. Fifty-four computed tomography (CT) facial models of average-looking and symmetrical Chinese subjects with a class I occlusion were used in this study. Eleven midline landmarks and 12 pairs of bilateral landmarks were digitized. The repeatability of the landmark digitization was first evaluated. A Procrustes analysis was then used to measure the fluctuating asymmetry of each CT model, after all of the models had been scaled to the average face size of the study sample. A principal component analysis was finally used to establish the direction of the fluctuating asymmetries. The results showed that there was excellent absolute agreement among the three repeated measurements. The mean fluctuating asymmetry of the average-size face varied at each anthropometric landmark site, ranging from 1.0mm to 2.8mm. At the 95% upper limit, the asymmetries ranged from 2.2mm to 5.7mm. Most of the asymmetry of the midline structures was mediolateral, while the asymmetry of the bilateral landmarks was more equally distributed. These values are for the average face. People with larger faces will have higher values, while subjects with smaller faces will have lower values., (Copyright © 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)

Objective: The authors report on the use and complications of alloplastic resorbable plates and compare their use to autologous cartilage grafts in secondary cleft nasal reconstruction., Design: Institutional review board (IRB)-approved retrospective chart review., Setting: Texas Cleft-Craniofacial Center at the McGovern Medical School at the University of Texas Health Sciences Center at Houston., Patients: Patients with unilateral or bilateral cleft lip nasal deformity who have undergone secondary correction of their nasal deformity with at least 1-year follow-up., Interventions: During their reconstruction, some patients had cartilage grafts used for support, whereas others were reconstructed using resorbable plates., Main Outcome Measure(s): Complications (exposure, infection, malposition, hematoma/seroma) and rates of tertiary revisions., Results: 197 patients underwent secondary cleft nasal reconstruction, with 30 patients in the resorbable plate group and 32 in the cartilage graft group. Age at surgery was 8.5±4.1 years with resorbable plates and 11.0±4.8 years with cartilage graft ( P = .03). Infection rate in the resorbable plate group and cartilage graft group were 0% and 3.25% ( P = 1). Extrusion occurred in 3 of the absorbable plate group and 2 patients with cartilage graft ( P = .67). Additional surgery was recorded in 43.3% of the resorbable plate group versus 53.1% of the cartilage graft group ( P = .459)., Conclusion: The data provide evidence that the use of alloplastic resorbable plate in the pediatric population is a safe alternative to autologous septal cartilage in secondary cleft nasal reconstruction. There is no statistical difference in short-term complications or the incidence of additional nasal surgery.

Purpose: There are many proven problems associated with traditional surgical planning methods for orthognathic surgery. To address these problems, we developed a computer-aided surgical simulation (CASS) system, the AnatomicAligner, to plan orthognathic surgery following our streamlined clinical protocol., Methods: The system includes six modules: image segmentation and three-dimensional (3D) reconstruction, registration and reorientation of models to neutral head posture, 3D cephalometric analysis, virtual osteotomy, surgical simulation, and surgical splint generation. The accuracy of the system was validated in a stepwise fashion: first to evaluate the accuracy of AnatomicAligner using 30 sets of patient data, then to evaluate the fitting of splints generated by AnatomicAligner using 10 sets of patient data. The industrial gold standard system, Mimics, was used as the reference., Result: When comparing the results of segmentation, virtual osteotomy and transformation achieved with AnatomicAligner to the ones achieved with Mimics, the absolute deviation between the two systems was clinically insignificant. The average surface deviation between the two models after 3D model reconstruction in AnatomicAligner and Mimics was 0.3 mm with a standard deviation (SD) of 0.03 mm. All the average surface deviations between the two models after virtual osteotomy and transformations were smaller than 0.01 mm with a SD of 0.01 mm. In addition, the fitting of splints generated by AnatomicAligner was at least as good as the ones generated by Mimics., Conclusion: We successfully developed a CASS system, the AnatomicAligner, for planning orthognathic surgery following the streamlined planning protocol. The system has been proven accurate. AnatomicAligner will soon be available freely to the boarder clinical and research communities.

Objective: The purpose of this study was to identify the factors that influence the parent's choice of cleft team/surgeon., Design: A 10-question survey was used to elucidate factors that influenced parents in choosing their cleft surgeon. No identifiers of the origin of the study were used to improve parent objectivity., Setting: The setting for this study was an online survey., Participants: Participants in this study were the parents of children who were born with cleft lip and/or palate., Interventions: Parents were contacted anonymously via national, established social media websites that were independently run by the parents themselves., Main Outcome Measures: The main outcome measures were information regarding choice of cleft team/surgeon, source of patient referrals, and use of online media in decision making., Results: A total of 112 responses were received. Of the parents, 77% sought prenatal evaluation with at least one cleft surgeon. Maternal-fetal medicine specialists were the most frequent (42%) referral source, followed by primary obstetricians (14%) and pediatricians (12%). The surgeon/cleft team's experience level and overall personality were ranked as the most important, whereas the least important was distance traveled. Of the parents, 95% used the Internet or social media for research prior to their prenatal visit; 96% of the parents found the prenatal visit helpful, and the most useful topics discussed were treatments (surgical, nonsurgical) and feeding techniques., Conclusion: This study identifies factors used to choose a cleft team/surgeon. Parents are more concerned with the experience level, reputation, and environment of the cleft team/surgeon than the distance traveled to get to the center.

The purposes of this study were to determine: (1) whether an observer's perception of the correct anatomical alignment of the head changes with time, and (2) whether different observers agree on the correct anatomical alignment. To determine whether the perception of the correct anatomical alignment changes with time (intra-observer comparison), a group of 30 observers were asked to orient, into anatomical alignment, the three-dimensional (3D) head photograph of a normal man, on two separate occasions. To determine whether different observers agree on the correct anatomical alignment (inter-observer comparison), the observed orientations were compared. The results of intra-observer comparisons showed substantial variability between the first and second anatomical alignments. Bland-Altman coefficients of repeatability for pitch, yaw, and roll, were 6.9°, 4.4°, and 2.4°, respectively. The results of inter-observer comparisons showed that the agreement for roll was good (sample variance 0.4, standard deviation (SD) 0.7°), the agreement for yaw was moderate (sample variance 2.0, SD 1.4°), and the agreement for pitch was poor (sample variance 15.5, SD 3.9°). In conclusion, the perception of correct anatomical alignment changes considerably with time. Different observers disagree on the correct anatomical alignment. Agreement among multiple observers was bad for pitch, moderate for yaw, and good for roll., (Copyright © 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)

The purpose of this study was to develop a principal component analysis-based adaptive minimum Euclidean distances (PAMED) approach to establish an optimal object reference frame for symmetrical alignment of the dental arch during computer-aided surgical simulation (CASS). It was compared with our triangular methods and the standard principal component analysis (PCA) method. Thirty sets of maxillary digital models were used. Midsagittal and occlusal planes were ranked by three experienced evaluators based on their clinical judgment. The results showed that for the midsagittal plane, all three evaluators ranked "ideal" for all 30 models with the PAMED method, 28 with the triangular method, and at least 11 with the PCA method. For the occlusal plane, one evaluator ranked all 30 models "ideal" with both the PAMED and the PCA methods while the other two evaluators ranked all 30 models "ideal" with the triangular method. However, the differences among the three methods were minimal. In conclusion, our PAMED method is the most reliable and consistent approach for establishing the object reference frame for the dental arch in orthognathic surgical planning. The triangular method should be used with caution because it can be affected by dental arch asymmetry. The standard PCA method is not recommended., (Copyright © 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)

Botulinum toxin has increasingly become a prevalent treatment option for a wide range of conditions, many of which have their roots in plastic surgery and have been well studied. In adults, chronic headache, hyperhidrosis, and facial muscular hypertrophy have been effectively treated with botulinum toxin, and emerging studies have begun looking at its efficacy in children, as well. Successful treatment of spasticity and muscular contraction has allowed for the creation of safety profiles and dosage guidelines for botulinum toxin usage in children. The expanded indications for its use have since flourished in all arenas of pediatric care, including plastic surgery. Recent studies have described the use of botulinum toxin as an adjunct to the treatment of congenital torticollis and cleft lip. This review discusses the various applications of botulinum toxin for pediatric patients in the field of plastic surgery.

Many patients with Pierre Robin sequence (PRS) have associated birth defects, most commonly in association with abnormalities in bone or cartilage formation. Depending on severity, treatment of PRS ranges from nonoperative management with prone positioning to surgical intervention such as distraction osteogenesis. Generally, if a surgical approach is needed, these patients undergo nasal endoscopy or direct laryngoscopy with their intubation, which puts the cervical spine in a position of extreme extension. The authors present a patient with syndromic PRS secondary to Sticklers syndrome, with a cervical abnormality diagnosed with three-dimensional computed tomography and further evaluated with dynamic lateral plain x-rays to assess cervical instability. The goal of this report is to highlight the need to include cervical spine evaluation in the preoperation workup of patients with PRS, especially those with suspected abnormalities in bone or collagen formation.

Background: The use of alloplastic material in cranial reconstruction has been well described in the adult population, especially when a paucity of autologous tissue exists. In children it is unknown how long-term growth, however, may be affected by the implantation of nonexpansible alloplastic material. Therefore, the authors sought to compare the outcomes of pediatric patients undergoing alloplastic versus autologous cranial reconstruction., Methods: To assess the safety and long-term outcomes of alloplastic cranioplasty in children, an institutional review board-approved, retrospective, single institution review of pediatric patients undergoing cranioplasty was performed from 2000 to 2014. The age at surgery, cause of the cranial defect, defect size, time since initial surgery to reconstruction, implant type, and complications were assessed. Postreconstruction imaging was reviewed if available., Results: A reconstructive cranioplasty was performed in 41 pediatric patients (ages 1-19 years, average 7.35 years). Thirty patients underwent alloplastic reconstruction (age 4.37 ± 5.57 years), and 11 underwent autologous reconstruction (age 2.00 ± 3.74 years). The size of the cranial defects was 144.01 ± 393.04 cm for autologous and 405.31 ± 572.96 cm for alloplastic reconstructions. Follow-up for all patients was an average of 2.33 ± 2.76 years (0.1-9 years). No patients in either group showed evidence of elevated intracranial pressure after cranioplasty. In long-term follow-up, none of the implants were exposed or lost because of infection. Computed tomography and physical examination demonstrated that there was no skull growth restriction in either group., Conclusions: Our data show that alloplastic cranioplasty in the pediatric population is a safe alternative, when autologous cranial bone is not available.

The management and diagnosis of nasal airway obstruction requires an understanding of the form and function of the nose. Nasal airway obstruction can be structural, physiologic, or a combination of both. Anatomic causes of airway obstruction include septal deviation, internal nasal valve narrowing, external nasal valve collapse, and inferior turbinate hypertrophy. Thus, the management of nasal air obstruction must be selective and carefully considered. The goal of surgery is to address the deformity and not just enlarge the nasal cavity., (Copyright © 2016 Elsevier Inc. All rights reserved.)

The success of craniomaxillofacial (CMF) surgery depends not only on the surgical techniques, but also on an accurate surgical plan. The adoption of computer-aided surgical simulation (CASS) has created a paradigm shift in surgical planning. However, planning an orthognathic operation using CASS differs fundamentally from planning using traditional methods. With this in mind, the Surgical Planning Laboratory of Houston Methodist Research Institute has developed a CASS protocol designed specifically for orthognathic surgery. The purpose of this article is to present an algorithm using virtual tools for planning a double-jaw orthognathic operation. This paper will serve as an operation manual for surgeons wanting to incorporate CASS into their clinical practice., (Copyright © 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)

Three-dimensional (3D) cephalometry is not as simple as just adding a 'third' dimension to a traditional two-dimensional cephalometric analysis. There are more complex issues in 3D analysis. These include how reference frames are created, how size, position, orientation and shape are measured, and how symmetry is assessed. The main purpose of this article is to present the geometric principles of 3D cephalometry. In addition, the Gateno-Xia cephalometric analysis is presented; this is the first 3D cephalometric analysis to observe these principles., (Copyright © 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)

Several factors affect healing of lip repair in children with complete cleft lip and palate in the immediate postoperative period. However, children with holoprosencephaly present a unique challenge. Because of their wide midline clefts and premaxillary agenesis they have protrusive positioning of their tongue, which can adversely affect the surgical result. In these cases we have found a postsurgical obturator made with hard-setting acrylic to be especially useful. Such an appliance may be used for the initial healing period (1-2 weeks). Two cases are presented here where such a device was used successfully.

The purpose of this retrospective study was to evaluate the long-term outcomes of using the microscopic minimally invasive approach for the treatment of nonsyndromic craniosynostosis. During the last 10 years, 180 consecutive patients with nonsyndromic craniosynostosis were treated: 67 patients were treated with microscopic minimally invasive approach, and 113 were treated with the open approach. In the microscopic group, there was 1 intraoperative complication (1.5%). There were 10 postoperative complications (14.9%), of which 9 required major reoperations and 1 required a minor procedure. The major complications occurred in 7 unicoronal patients (58.3%) and 2 metopic patients (25.0%). In the open-approach group, there were 8 complications (7.1%), 2 patients required major reoperations and 6 required minor procedures. Chi-squared test showed that there was no statistically significant difference in the overall complication rate between the microscopic and open approaches. However, in the unicoronal patients, the complication rate was significantly higher in the microscopic group (P < 0.001). In conclusion, the microscopic approach is our treatment of choice in nonsyndromic patients with sagittal and lambdoidal craniosynostosis. We no longer use the microscopic approach in patients with unicoronal or metopic craniosynostosis because of the high complication rate.

Purpose: The purpose of this prospective multicenter study was to assess the accuracy of a computer-aided surgical simulation (CASS) protocol for orthognathic surgery., Materials and Methods: The accuracy of the CASS protocol was assessed by comparing planned outcomes with postoperative outcomes of 65 consecutive patients enrolled from 3 centers. Computer-generated surgical splints were used for all patients. For the genioplasty, 1 center used computer-generated chin templates to reposition the chin segment only for patients with asymmetry. Standard intraoperative measurements were used without the chin templates for the remaining patients. The primary outcome measurements were the linear and angular differences for the maxilla, mandible, and chin when the planned and postoperative models were registered at the cranium. The secondary outcome measurements were the maxillary dental midline difference between the planned and postoperative positions and the linear and angular differences of the chin segment between the groups with and without the use of the template. The latter were measured when the planned and postoperative models were registered at the mandibular body. Statistical analyses were performed, and the accuracy was reported using root mean square deviation (RMSD) and the Bland-Altman method for assessing measurement agreement., Results: In the primary outcome measurements, there was no statistically significant difference among the 3 centers for the maxilla and mandible. The largest RMSDs were 1.0 mm and 1.5° for the maxilla and 1.1 mm and 1.8° for the mandible. For the chin, there was a statistically significant difference between the groups with and without the use of the chin template. The chin template group showed excellent accuracy, with the largest positional RMSD of 1.0 mm and the largest orientation RMSD of 2.2°. However, larger variances were observed in the group not using the chin template. This was significant in the anteroposterior and superoinferior directions and the in pitch and yaw orientations. In the secondary outcome measurements, the RMSD of the maxillary dental midline positions was 0.9 mm. When registered at the body of the mandible, the linear and angular differences of the chin segment between the groups with and without the use of the chin template were consistent with the results found in the primary outcome measurements., Conclusions: Using this computer-aided surgical simulation protocol, the computerized plan can be transferred accurately and consistently to the patient to position the maxilla and mandible at the time of surgery. The computer-generated chin template provides greater accuracy in repositioning the chin segment than the intraoperative measurements., (Copyright © 2013 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Purpose: The purpose of the present study was to evaluate the accuracy of our newly developed approach to digital dental model articulation., Materials and Methods: Twelve sets of stone dental models from patients with craniomaxillofacial deformities were used for validation. All the models had stable occlusion and no evidence of early contact. The stone models were hand articulated to the maximal intercuspation (MI) position and scanned using a 3-dimensional surface laser scanner. These digital dental models at the MI position served as the control group. To establish an experimental group, each mandibular dental model was disarticulated from its original MI position to 80 initial positions. Using a regular office personal computer, they were digitally articulated to the MI position using our newly developed approach. These rearticulated mandibular models served as the experimental group. Finally, the translational, rotational, and surface deviations in the mandibular position were calculated between the experimental and control groups, and statistical analyses were performed., Results: All the digital dental models were successfully articulated. Between the control and experimental groups, the largest translational difference in mandibular position was within 0.2 mm ± 0.6 mm. The largest rotational difference was within 0.1° ± 1.1°. The averaged surface deviation was 0.08 ± 0.07. The results of the Bland and Altman method of assessing measurement agreement showed tight limits for the translational, rotational, and surface deviations. In addition, the final positions of the mandibular articulated from the 80 initial positions were absolutely agreed on., Conclusion: The results of our study have demonstrated that using our approach, the digital dental models can be accurately and effectively articulated to the MI position. In addition, the 3-dimensional surface geometry of the mandibular teeth played a more important role in digital dental articulation than the initial position of the mandibular teeth., (Copyright © 2012 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

The success of cranio-maxillofacial (CMF) surgery depends not only on surgical techniques, but also upon an accurate surgical plan. Unfortunately, traditional planning methods are often inadequate for planning complex cranio-maxillofacial deformities. To this end, we developed 3D computer-aided surgical simulation (CASS) technique. Using our CASS method, we are able to treat patients with significant asymmetries in a single operation which in the past was usually completed in two stages. The purpose of this article is to introduce our CASS method in evaluating craniofacial deformities and planning surgical correction. In addition, we discuss the problems associated with the traditional surgical planning methods. Finally, we discuss the strength and pitfalls of using three-dimensional measurements to evaluate craniofacial deformity.

Purpose: The purpose of this study was to determine whether the surgical outcomes achieved with computer-aided surgical simulation (CASS) are better than those achieved with traditional methods., Materials and Methods: Twelve consecutive patients with craniomaxillofacial (CMF) deformities were enrolled. According to the CASS clinical protocol, a 3-dimensional computer composite skull model for each patient was generated and reoriented to the neutral head posture. These models underwent 2 virtual surgeries: 1 was based on CASS (experimental group) and the other was based on traditional methods 1 year later (control group). Once the 2 virtual surgeries were completed, 2 experienced oral and maxillofacial surgeons at 2 different settings evaluated the 2 surgical outcomes. They were blinded to the planning method used on the virtual models and each other's evaluation results. The primary outcome was overall CMF skeletal harmony. The secondary outcomes were individual maxillary, mandibular, and chin harmonies. Statistical analyses were performed., Results: Overall CMF skeletal harmony achieved with CASS was statistically significantly better than that achieved with traditional methods. In addition, the maxillary and mandibular surgical outcomes achieved with CASS were significantly better. Furthermore, although not included in the statistical model, the chin symmetry achieved by CASS tended to be better. A regression model was established between mandibular symmetry and overall CMF skeletal harmony., Conclusion: The surgical outcomes achieved with CASS are significantly better than those achieved with traditional planning methods. In addition, CASS enables the surgeon to better correct maxillary yaw deformity, better place proximal/distal segments, and better restore mandibular symmetry. The critical step in achieving better overall CMF skeletal harmony is to restore mandibular symmetry., (Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Two basic problems have been associated with traditional 2-dimensional cephalometry. First, many important parameters cannot be measured on plain cephalograms; and second, most 2-dimensional cephalometric measurements are distorted in the presence of facial asymmetry. Three-dimensional cephalometry, which has been facilitated by the introduction of cone-beam computed tomography, can solve these problems. However, before this can be realized, fundamental problems must be solved. These include the unreliability of internal reference systems and some 3-dimensional measurements, and the lack of tools to assess and measure the symmetry. In the present report, we present a new 3-dimensional cephalometric analysis that uses different geometric approaches to solve these fundamental problems. The present analysis allows the accurate measurement of the size, shape, position, and orientation of the different facial units and incorporates a novel method to measure asymmetry., (Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Purpose: The purpose of this study was to evaluate the clinical feasibility of a new method to orient 3-dimensional (3D) computed tomography models to the natural head position (NHP). This method uses a small and inexpensive digital orientation device to record NHP in 3 dimensions. This device consists of a digital orientation sensor attached to the patient via a facebow and an individualized bite jig. The study was designed to answer 2 questions: 1) whether the weight of the new device can negatively influence the NHP and 2) whether the new method is as accurate as the gold standard., Patients and Methods: Fifteen patients with craniomaxillofacial deformities were included in the study. Each patient's NHP is recorded 3 times. The first NHP was recorded with a laser scanning method without the presence of the digital orientation device. The second NHP was recorded with the digital orientation device. Simultaneously, the third NHP was also recorded with the laser scanning method. Each recorded NHP measurement was then transferred to the patient's 3D computed tomography facial model, resulting in 3 different orientations for each patient: the orientation generated via the laser scanning method without the presence of the digital orientation sensor and facebow (orientation 1), the orientation generated by use of the laser scanning method with the presence of the digital orientation sensor and facebow (orientation 2), and the orientation generated with the digital orientation device (orientation 3). Comparisons are then made between orientations 1 and 2 and between orientations 2 and 3, respectively. Statistical analyses are performed., Results: The results show that in each pair, the difference (Δ) between the 2 measurements is not statistically significantly different from 0°. In addition, in the first pair, the Bland-Altman lower and upper limits of the Δ between the 2 measurements are within 1.5° in pitch and within a subdegree in roll and yaw. In the second pair, the limits of the Δ in all 3 dimensions are within 0.5°., Conclusion: Our technique can accurately record NHP in 3 dimensions and precisely transfer it to a 3D model. In addition, the extra weight of the digital orientation sensor and facebow has minimal influence on the self-balanced NHP establishment., (Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Purpose: To test the hypothesis that facial symmetry affects both 2-dimensional (2D) and 3-dimensional (3D) cephalometric measurements., Methods: A baseline model of a preferred symmetrical face was first constructed. It consisted of a set of commonly used cephalometric landmarks. Seven cephalometric measurements were selected for testing. Each of them represented a different set of geometrical conditions related to the geometric parameters being measured, the elements involved, and the type of measurements. They served as a control group. The baseline model was then modified to simulate 10 different asymmetric models, 6 with maxillary asymmetries and 4 with mandibular asymmetries. The same 7 cephalometric analysis were utilized again on each of the 10 asymmetric models. They served as an experimental group., Results: The resulted measurements were tabulated and compared. For the measurements of shape, the 2D cephalometric measurement was distorted by roll and yaw asymmetries, while the same measurement in 3D was not. For the measurements of size, the 2D measurement was also distorted by yaw, but not by roll, while again this measurement in 3D was not distorted. For measurements of position, the results were reversed. The 2D cephalometric measurements of position were not distorted, while all measurements in 3D were distorted. Of note, the magnitude of the distortion was much larger for the linear measurement than angular measurement. Finally, measurements of orientation, both 2D and 3D measurements were distorted by asymmetry, although the magnitude of the distortion was larger for the 3D measurements., Conclusion: This study confirmed the hypothesis that facial asymmetry affects both 2D and 3D cephalometric measurements. It also demonstrated that the effects of asymmetry on cephalometric measurements depend on the geometric parameter being measured (ie, shape, size, position, or orientation)., (Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

Purpose: The purpose of this study was to evaluate the long-term effectiveness of presurgical nasoalveolar molding (PNAM) in patients with unilateral cleft lip and palate (UCLP)., Methods: Twenty-five patients with UCLP treated by either PNAM or non-PNAM therapy between 1998 and 2003 were recruited in the study. During the clinical examination and data analysis, the evaluators were blinded to which patients received PNAM. The patients were reviewed clinically, and their facial morphology was captured with a three-dimensional scanner. Their dental arch configuration and occlusion were recorded by plaster dental models. After the patient evaluations and measurements were completed, the patient list was unblinded. There were 20 patients in the PNAM group and 5 patients in the non-PNAM group. Fisher exact tests and Wilcoxon rank sum tests were used to compare the outcomes., Results: Clinically, the improvement in the PNAM group was most evident in nasal and lip anatomy. However, there were no statistically significant differences between the 2 groups on each of the measurements on three-dimensional facial images and dental models., Conclusions: Our study suggests a trend toward a long-term clinical improvement in nasal and lip anatomy of UCLP patients treated with PNAM. However, these improved results were not confirmed by three-dimensional stereophotography. There was no statistically significant difference in the long-term three-dimensional anthropometric measurements and dental model analysis between the PNAM group and the non-PNAM group.

Purpose: The purpose of this study was to develop a motion simulator capable of recreating and recording the full range of mandibular motions in a cadaveric preparation for an intact temporomandibular joint (TMJ) and after total joint replacement., Material and Methods: A human cadaver head was used. Two sets of tracking balls were attached to the forehead and mandible, respectively. Computed tomographic (CT) scan was performed and 3-dimensional CT models of the skull were generated. The cadaver head was then dissected to attach the muscle activation cables and mounted onto the TMJ simulator. Realistic jaw motions were generated through the application of the following muscle forces: lateral pterygoid muscle, suprahyoid depressors (geniohyoid, mylohyoid, and digastric muscles), and elevator muscles. To simulate muscle contraction, cables were inserted into the mandible at the center area of each muscle's attachment. To provide a minimum mouth closing force at the initial position, the elevator muscles were combined at the anterior mandible. During mandibular movement, each motion was recorded using a high-resolution laser scanner. The right TMJ of the same head was reconstructed with a total TMJ prosthesis. The same forces were applied and the jaw motions were recorded again. CT scan was performed and 3-dimensional CT models of the skull with TMJ prosthesis were generated., Results: Mandibular motions, before and after TMJ replacement, with and without lateral pterygoid muscle reattachment, were re-created in a cadaveric preparation. The laser-scanned data during the mandibular motion were used to drive 3-dimensional CT models. A movie for each mandibular motion was subsequently created for motion path analysis. Compared with mandibular motion before TMJ replacement, mandibular lateral and protrusive motions after TMJ replacement, with and without lateral pterygoid muscle reattachment, were greatly limited. The jaw motion recorded before total joint replacement was applied to the mandibular and prostheses models after total TMJ replacement. The condylar component was observed sinking into the fossa during jaw motion., Conclusion: A motion simulator capable of re-creating and recording full range of mandibular motions in a cadaveric preparation has been developed. It can be used to simulate mandibular motions for the intact TMJ and total joint prosthesis, and to re-create and record their full range of mandibular motions. In addition, the full range of the recorded motion can be re-created as motion images in a computer. These images can be used for motion path analysis and to study the causation of limited range of motion after total joint replacement and strategies for improvement., (Copyright © 2011 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)

The purpose of this study was to develop and test a new technique for recording natural head position (NHP) in 3 dimensions and transferring it into a three-dimensional computed tomography (CT) model. In this technique, a digital gyroscope was first attached to a human head using a bite-jig and a face-bow with a set of built-in fiducial markers. The relationship between the gyroscope and fiducial markers was predetermined and kept constant. The orientation (pitch, roll, and yaw) of the head was then recorded by this gyroscope. In next step, the head was CT scanned with the bite-jig and the face-bow in place, and three-dimensional CT models of the head and fiducial markers were generated. The head model was coupled with a predetermined three-dimensional model of the gyroscope assembly via fiducial markers. The three-dimensional head model was reoriented to the recorded orientation by applying the recorded pitch, roll, and yaw to the gyroscope model. Finally, the accuracy of the technique was tested on a human dry skull. The results showed that the NHP was successfully recorded and transferred to the three-dimensional CT model. The orientations between the dry skull and its three-dimensional computer model were absolutely correlated. The difference (the lack of agreement) was within a range of -1.1 to 1.1 degrees, indicating no clinical significance. The authors concluded that our technique could accurately and repeatedly record NHP three-dimensionally and transfer it to a three-dimensional CT head model.

Purpose: The purpose of this retrospective study was to present the results of the authors' microscopic minimally invasive approach in the treatment of nonsyndromic craniosynostosis., Methods: From 2001 to 2007, the authors treated a cohort of 67 infants with nonsyndromic sagittal, unicoronal, bicoronal, and metopic craniosynostosis, either with the microscopic (n = 40) or the open (n = 27) approach. In the microscopic approach, incisions were placed over the premature suture, and using a surgical microscope, the appropriate synostectomy was performed. The open approach used a traditional coronal incision with cranial vault reconstruction. Both groups of patients had postoperative molding helmet therapy. Finally, anthropometric measurements were used to evaluate the treatment results. The measurement used for the patients with sagittal and bicoronal craniosynostoses was the divergence from the norm of the age-adjusted cephalic index. The (FZr-EUl/FZl-EUr) and (FZr-EUr)/(FZl-EUl) were used for the patients with unicoronal craniosynostosis. The divergence from the norm of age-adjusted (FTr-FTl)/(Tr-Tl) was used for the patients with metopic craniosynostosis. (FZr = right frontozygomaticus, EUl = left eurion, FZl = left frontozygomaticus, Eur = right eurion, FTr = right frontotemporale, FTl = left frontotemporale, Tr = tragion, Tl = left tragion)., Results: The median surgical times for microscopic and open approaches were 108 and 210 minutes, the volumes of blood loss were 75 and 220 mL, the durations of hospital stay were 2 and 4 days, the numbers of helmet were 2 and 1, and the durations of helmet therapy were 10.5 and 8 weeks, respectively. The analysis of variance for repeated measures showed that there was no statistically significant difference between the 2 groups in any of the craniosynostoses., Conclusions: The treatment outcomes from the microscopic minimally invasive approach to craniosynostosis are equal to those seen with the open approach. The microscopic approach results in less operative time, blood loss, and hospitalization.

Objective: To evaluate the long-term effectiveness of helmet therapy in the correction of deformational plagiocephaly and to assess the early occlusal abnormalities seen in these patients., Design: A prospective study with blinded measurements., Patients: Twenty-eight patients with deformational plagiocephaly who were treated with molding helmet therapy with at least 5 years of follow-up., Interventions: The average length of molding helmet treatment was 6.2 months. At the time of this follow-up evaluation, the mean interval since completing the molding helmet therapy was 5.6 years., Main Outcome Measures: Anthropometric measurements of cranial asymmetry included cranial vault asymmetry (CVA), orbitotragial depth asymmetry (OTDA), and cranial base asymmetry (CBA). A dental examination was also performed., Results: At the completion of therapy, the most improvement was seen in the measurement of CBA, followed by CVA and OTDA. However, in evaluating the long-term stability of molding treatment, OTDA tended to continue improving after the initial treatment, while CBA and CVA appeared to regress, although none of the changes reached statistically significant levels. In dental measurements, all the dental midline and chin deviations were toward the unaffected side with respect to occipital deformation., Conclusion: This study demonstrated that helmet remodeling with the dynamic orthotic cranioplasty band is effective in the correction of cranial asymmetry, with some nonstatistically significant changes in long-term cranial vault symmetry. Dental observations indicated the possibility of occlusal abnormalities that may affect dental, especially orthodontic, diagnosis and treatment planning.

Purpose: The purpose of this study was to establish clinical feasibility of our 3-dimensional computer-aided surgical simulation (CASS) for complex craniomaxillofacial surgery., Materials and Methods: Five consecutive patients with complex craniomaxillofacial deformities, including hemifacial microsomia, defects after tumor ablation, and deformity after TMJ reconstruction, were used. The patients' surgical interventions were planned by using the authors' CASS planning method. Computed tomography (CT) was initially obtained. The first step of the planning process was to create a composite skull model, which reproduces both the bony structures and the dentition with a high degree of accuracy. The second step was to quantify the deformity. The third step was to simulate the entire surgery in the computer. The maxillary osteotomy was usually completed first, followed by mandibular and chin surgeries. The shape and size of the bone graft, if needed, was also simulated. If the simulated outcomes were not satisfactory, the surgical plan could be modified and simulation could be started over. The final step was to create surgical splints. Using the authors' computer-aided designing/manufacturing techniques, the surgical splints and templates were designed in the computer and fabricated by a stereolithographic apparatus. To minimize the potential risks to the patients, the surgeries were also planned following the current planning methods, and acrylic surgical splints were created as a backup plan., Results: All 5 patients were successfully planned using our CASS planning method. The computer-generated surgical splints were successfully used on all patients at the time of the surgery. The backup acrylic surgical splints and plans were never used. Six-week postoperative CT scans showed the surgical plans were precisely reproduced in the operating room and the deformities were corrected as planned., Conclusion: The results of this study have shown the clinical feasibility of our CASS planning method. Using our CASS method, we were able to treat patients with significant asymmetries in a single operation that in the past was usually completed in 2 stages. We were also able to simulate different surgical procedures to create the appropriate plan. The computerized surgical plan was then transferred to the patient in the operating room using computer-generated surgical splints.