Search

Purpose: To evaluate the color alterations, flexural strength, and microhardness properties of two different 3D-printed permanent crown resins. Materials and Methods: Samples were produced from two different 3D-printed permanent crown resins: Group 1 (Saremco Crowntec, Saremco Dental) and Group 2 (P-crown V2, Senertek). Color changes (ΔE values), flexural strength, and Vickers hardness number (VHN) of the samples were calculated. Data were analyzed with Shapiro-Wilk normality test, independent t test, and Mann-Whitney U tests. The significance level was accepted as P < .05. Results: ΔE values for red wine were found to be significantly higher in Group 1 (6.43 ± 2.26; P < .001). The flexural strength values (MPa) of Group 1 were significantly higher than Group 2 in all three solutions (P < .001). There was no significant difference between the VHN values of the samples kept in wine and coffee solutions (P = .271; .827). Conclusions: 3D-printing resins are affected at different levels by coloring solutions. Microhardness and flexural strength of 3D-printed samples kept in different coloring agents are different. In the use of 3D-printing resins, product selection should be made by taking into account the individual factors such as the eating and drinking habits of the patient and the physical properties expected from the sample. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the relationship among different skeletal malocclusion patterns, sleep-disordered breathing (SDB) and children's oral health-related quality of life (OHRQoL). Methods: Two hundred-five patients were divided into three groups, considering skeletal malocclusion. Parents completed the Pediatric Sleep Questionnaire (PSQ) on behalf of the patients, who completed the 14-question version of the Oral Health Impact Profile (OHIP-14). Results: SDB was observed in 10.7% of children. The overall prevalence of snoring, difficulty breathing during sleeping, mouth breathing, and dry mouth on awakening was 8.78%, 7.31%, 36.09%, and 37.07%, respectively. However, there was no significant difference in OHIP-14 parameters among the skeletal groups. A positive correlation was found between OHIP-14 and PSQ and was significant in Class I and III. Conclusion: Although there was no significant difference, SDB risk and sleep quality were found as most to least problematic, in the following sequential order: Class II > Class III > Class I. [ABSTRACT FROM AUTHOR]

Objectives: To compare the skeletal and dental effects of different types of rapid maxillary expansion (RME) appliances using cone‐beam computed tomography (CBCT). Materials/Methods: This multi‐centre study was conducted with a total of 56 patients. The sample consisted of two groups including the McNamara‐Type RME (MNR) group with 30 patients (16 females, 14 males, mean age: 13.38 ± 1.16 years) and Full‐Coverage RME (FCR) group with 26 patients (10 females, 16 males, mean age:13.78 ± 1.06 years). Twenty‐one parameters were measured on CBCT images including 4 maxillary skeletal, 12 maxillary alveolar, and 5 maxillary dental measurements, and the data were analysed using the SPSS 20.0 software. Results: The rates of increase in the palatal maxillary width (PMW) (3), PMW(4), and PMW(6) were significantly higher in the MNR group (P <.05). While the rates of increase in the buccal maxillary width (BMW) (3) and BMW(4) were statistically higher in the MNR group, the rate of increase in BMW (6) was higher in the FCR group (P <.05). The increases in HPW (4), HPW (6), PAA4(°), and PAA6(°), which are parameters about hard palate width (HPW) and palatal alveolar angle (PAA), were also significantly higher in the MNR group (P <.05). The increases in PAW (4) and PAW (6), referring to the widths between the palatal root apices were significantly higher in the MNR group (P <.05).The increase in Slope‐6(°) was also higher in the MNR group (P <.05). Conclusion: Expansion in the palatal region on the alveolar level was higher in MNR than in FCR, while expansion in FCR was the highest in the posterior. In both appliances, there was tipping in the buccal direction in both alveolar bone and teeth, and the rate of this tipping was higher in MNR. [ABSTRACT FROM AUTHOR]

Objective: To estimate the prevalence of temporomandibular disorders in adolescent orthodontic patients with different dental malocclusions and to assess the relationship between oral health-related quality of life.Methods: This study was carried out on 648 randomly selected individuals 14-19 years of age. Diagnostic Criteria for Temporomandibular Disorders (DC/TMD), Fonseca Questionnaire, and Oral Health Impact Profile-14 (OHIP-14) forms were used.Results: The GCPS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, OBC, and PHQ-15 mean scores of female participants were statistically significantly higher than males (p < 0.05).There was a significant difference among the malocclusion groups in terms of their mean scores in GCPS, Fonseca, and OHIP-14 (p < 0.05).The age values and JFLS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, and PHQ-15 were statistically significant correlations in the positive direction.Conclusion: The DC/TMD form allows both a physical assessment of Axis I and II that examines psychosocial status and pain-related disorders and a more comprehensive assessment. The mean OHIP-14 and Fonseca questionnaire scores of Class III groups were found to be significantly higher. [ABSTRACT FROM AUTHOR]

Copyright of Online Turkish Journal of Health Sciences (OTJHS) / Online Türk Sağlık Bilimleri Dergisi is the property of Oguz KARABAY and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: The aim of this short communication was to evaluate the quality and content of the Instagram posts about orthognathic surgery. Methods: Two hashtags #jawsurgery and #orthognathicsurgery were searched on Instagram in this retrospective Instagram post analysis study. Selected 100 posts for each hashtag were analyzed for type, total number of likes, comments, purpose and source. Results: Most of the posts about #jawsurgery were uploaded by patients (56.1%) who shared their personal experience. Most of the posts about #orthognathicsurgery also were uploaded by clinics (49.1%). Most of posts (39.6%) provided information about orthognathic surgery in #orthognaticsurgery. Posts generally involved by patient's experience (49.1%), followed by patient information (28.1%), and advertisement (22.8%) in #jawsurgery. Conclusion: Patients should be educated by orthodontists and maxillofacial surgeons about Instagram platform that it is not an adequate or accurate source of information about orthognathic surgery in its current form. [ABSTRACT FROM AUTHOR]

Objective: The purpose of this study was to analyze facial soft tissue thickness and cranial skeletal transverse widths in adolescent subjects with different body mass index (BMI) percentiles.Methods: The 80 subjects were divided into three groups according to BMI percentile: normal-weight, overweight, and obese adolescent subjects. Facial soft tissue linear and cranial skeletal transversal width measurements were performed on lateral and postero-anterior cephalometric radiographs.Results: Glabella, nasion, pogonion, and gnathion soft tissue thicknesses were significantly different among normal-weight, overweight, and obese subjects (p < 0.05). However, other facial soft tissue thickness parameters were not statistically significantly different among the groups (p > 0.05). Moreover, there were no significant differences in cranial skeletal transversal widths among groups (p > 0.05).Conclusion: Nasion soft tissue thickness was thicker in overweight subjects; whereas, glabella, pogonion and gnathion soft tissue thickness was thicker in obese subjects. All measured cranial skeletal widths were similar in normal-weight, overweight, and obese subjects. [ABSTRACT FROM AUTHOR]

Objective: To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different types of ceramic surfaces treated with different etching procedures and bonding agents. Materials and Methods: Monolithic CAD/CAM ceramic specimens (N=120; n=40 each group) of feldspathic ceramic Vita Mark II, resin nanoceramic Lava Ultimate, and hybrid ceramic Vita Enamic were fabricated (14x12x3 mm). Ceramic specimens were separated into four subgroups (n=10) according to type of surface treatment and bonding onto the ceramic surface. Within each group, four subgroups were prepared by phosphoric acid, hydrofluoric acid, Transbond XT primer, and Clearfill Ceramic primer. Mandibular central incisor metal brackets were bonded with light-cure composite. The SBS data were analyzed using three-way analysis of variance (ANOVA) and Tukey HSD tests. Results: The highest SBS was found in the Vita Enamic group, which is a hybrid ceramic, etched with hydrofluoric acid and applied Transbond XT Adhesive primer (7.28 ± 2.49 MPa). The lowest SBS was found in the Lava Ultimate group, which is a resin nano-ceramic etched with hydrofluoric acid and applied Clearfill ceramic primer (2.20 ± 1.21 MPa). Conclusions: CAD/CAM material types and bonding procedures affected bond strength (P < .05), but the etching procedure did not (P >.05). The use of Transbond XT as a primer bonding agent resulted in higher SBS. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the relationship among different skeletal malocclusion patterns, sleep-disordered breathing (SDB) and children's oral health-related quality of life (OHRQoL)., Methods: Two hundred-five patients were divided into three groups, considering skeletal malocclusion. Parents completed the Pediatric Sleep Questionnaire (PSQ) on behalf of the patients, who completed the 14-question version of the Oral Health Impact Profile (OHIP-14)., Results: SDB was observed in 10.7% of children. The overall prevalence of snoring, difficulty breathing during sleeping, mouth breathing, and dry mouth on awakening was 8.78%, 7.31%, 36.09%, and 37.07%, respectively. However, there was no significant difference in OHIP-14 parameters among the skeletal groups. A positive correlation was found between OHIP-14 and PSQ and was significant in Class I and III., Conclusion: Although there was no significant difference, SDB risk and sleep quality were found as most to least problematic, in the following sequential order: Class II > Class III > Class I.

Objective : To estimate the prevalence of temporomandibular disorders in adolescent orthodontic patients with different dental malocclusions and to assess the relationship between oral health-related quality of life. Methods : This study was carried out on 648 randomly selected individuals 14-19 years of age. Diagnostic Criteria for Temporomandibular Disorders (DC/TMD), Fonseca Questionnaire, and Oral Health Impact Profile-14 (OHIP-14) forms were used. Results : The GCPS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, OBC, and PHQ-15 mean scores of female participants were statistically significantly higher than males ( p < 0.05).There was a significant difference among the malocclusion groups in terms of their mean scores in GCPS, Fonseca, and OHIP-14 ( p < 0.05).The age values and JFLS, TMD Pain, Fonseca, OHIP-14, PHQ-9, GAD-7, and PHQ-15 were statistically significant correlations in the positive direction. Conclusion : The DC/TMD form allows both a physical assessment of Axis I and II that examines psychosocial status and pain-related disorders and a more comprehensive assessment. The mean OHIP-14 and Fonseca questionnaire scores of Class III groups were found to be significantly higher.

Objective: The purpose of this study was to analyze facial soft tissue thickness and cranial skeletal transverse widths in adolescent subjects with different body mass index (BMI) percentiles., Methods: The 80 subjects were divided into three groups according to BMI percentile: normal-weight, overweight, and obese adolescent subjects. Facial soft tissue linear and cranial skeletal transversal width measurements were performed on lateral and postero-anterior cephalometric radiographs., Results: Glabella, nasion, pogonion, and gnathion soft tissue thicknesses were significantly different among normal-weight, overweight, and obese subjects ( p  < 0.05). However, other facial soft tissue thickness parameters were not statistically significantly different among the groups ( p  > 0.05). Moreover, there were no significant differences in cranial skeletal transversal widths among groups ( p  > 0.05)., Conclusion: Nasion soft tissue thickness was thicker in overweight subjects; whereas, glabella, pogonion and gnathion soft tissue thickness was thicker in obese subjects. All measured cranial skeletal widths were similar in normal-weight, overweight, and obese subjects.

Background/objective: The aim of this study was to investigate the effects of different concentrations of ozone (O3) therapy on bone regeneration in response to an expansion of the inter-premaxillary suture in rats., Materials and Methods: Forty-eight Wistar rats were randomly divided into four groups (n = 12). In groups I, II, and III, 1ml of O3 at 10, 25, and 40 µg/ml was injected at the premaxillary suture, respectively. In group IV (control group), 1ml of saline solution was injected at the same point during the expansion procedure for 5 days. Bone regeneration in the suture was evaluated histomorphometrically. The area of new bone and fibrotic area, the number of osteoblasts and osteoclasts, and the amount of vascularity were measured and compared. The density of the newly formed bone in the expansion area was measured by using cone beam computed tomography. Data were analyzed using the Kruskal-Wallis one-way analysis of variance and post hoc Student-Newman-Keuls tests., Results: New bone area, fibrotic area, osteoblast and osteoclast numbers, and the amount of vascularity were significantly higher in experimental groups compared with the control group (P < 0.001). The density of newly formed bone (P < 0.001), new bone formation (P = 0.009), number of capillaries (P < 0.001), number of osteoclasts (P = 0.016), and number of osteoblasts (P < 0.001) in the maxillary sutures were highest in the 25 μg/ml O3 group compared with the other experimental groups and control group., Conclusions/implications: The application of O3 therapy can stimulate bone regeneration in an orthopedically expanded inter-premaxillary suture during both the expansion and retention periods., (© The Author 2015. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oup.com.)