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Background: Bioresorbable patient-specific additive-manufactured bone grafts, meshes, and plates are emerging as a promising alternative that can overcome the challenges associated with conventional off-the-shelf implants. The fabrication of patient-specific implants (PSIs) directly at the point-of-care (POC), such as hospitals, clinics, and surgical centers, allows for more flexible, faster, and more efficient processes, reducing the need for outsourcing to external manufacturers. We want to emphasize the potential advantages of producing bioresorbable polymer implants for cranio-maxillofacial surgery at the POC by highlighting its surgical applications, benefits, and limitations. Methods: This study describes the workflow of designing and fabricating degradable polymeric PSIs using three-dimensional (3D) printing technology. The cortical bone was segmented from the patient's computed tomography data using Materialise Mimics software, and the PSIs were designed created using Geomagic Freeform and nTopology software. The implants were finally printed via Arburg Plastic Freeforming (APF) of medical-grade poly (L-lactide-co-D, L-lactide) with 30% β-tricalcium phosphate and evaluated for fit. Results: 3D printed implants using APF technology showed surfaces with highly uniform and well-connected droplets with minimal gap formation between the printed paths. For the plates and meshes, a wall thickness down to 0.8 mm could be achieved. In this study, we successfully printed plates for osteosynthesis, implants for orbital floor fractures, meshes for alveolar bone regeneration, and bone scaffolds with interconnected channels. Conclusions: This study shows the feasibility of using 3D printing to create degradable polymeric PSIs seamlessly integrated into virtual surgical planning workflows. Implementing POC 3D printing of biodegradable PSI can potentially improve therapeutic outcomes, but regulatory compliance must be addressed. [ABSTRACT FROM AUTHOR]

Introduction: The treatment of Vancouver B2 periprosthetic fractures after hip arthroplasty is still a matter of debate. Revision Arthroplasty (RA) was long thought to be the treatment of choice, however several recent papers suggested that Open Reduction and Internal Fixation (ORIF) is a viable option for selected B2 fractures. Complication rates of 14–26% have been reported following surgical treatment of B2 fractures. No significant difference between RA and ORIF in the complication rates nor in the functional outcome was observed. Method: We conducted a retrospective analysis of 97 consecutive Vancouver B2 fractures treated according to the algorithm at our institution from 2007 to 2020 and recorded complications and patient specific data. Result: From the 97 patient, 45 fractures were treated with RA while 52 fractures were treated with ORIF. Thirteen patients in the RA group had a complication that needed revision (28%) and 11 patients in the ORIF group needed revision (21%). There was no significant difference between complication rates. The reason for failure in the 13 RA patients were infection (n = 4), stem subsidence (n = 1), refracture after a new fall (n = 3), secondary dislocation of the greater trochanter (n = 1) and dislocation (n = 4). The reason for failure in the 11 ORIF patients that were revised were infection (n = 5), persistent symptomatic stem loosening (n = 3) and refracture (n = 3) after a new fall. Conclusion: ORIF can be used to revise cemented and non-cemented shafts in more than half of Vancouver B2 fractures with no difference in complication rates when compared to RA. A periprosthetic fracture around the hip has a 21–28% risk of a re-operation after revision surgery with infection and re-fracture after a new fall being the most frequent cause of re-operation. [ABSTRACT FROM AUTHOR]

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Copyright of Die Unfallchirurgie is the property of Springer Nature 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: This study investigated the biomechanical properties of a new plate used for the treatment of posterolateral tibial plateau fractures using finite element analysis. Methods: The study groups were as follows: group PM, model of the new plate with posteromedial tibial plateau fracture; group PL, model of the new plate with posterolateral tibial plateau fracture; and group PC, model of the new plate with posterior tibial plateau fracture. We used two loading modes: uniform loading on the entire plateau, and loading on the posterior plateau. Data such as the displacement of the fracture and distribution of stress on the new plate and screws were recorded and analyzed. Results: When the whole plateau was loaded, the displacement of fractures in groups PM, PL, and PC were 0.273, 0.114, and 0.265 mm, respectively. The maximum stresses on the plates in groups PM, PL, and PC were 118.131 MPa, 44.191 MPa, and 115.433 MPa. The maximum stresses on the screws in Groups PM, PL, and PC were 166.731, 80.330, and 164.439 MPa, respectively. When the posterior tibial plateau was loaded, the displacement of the fractures in groups PM, PL, and PC was 0.410, 0.213, and 0.390 mm, respectively. The maximum stresses on the plates in groups PM, PL, and PC were 194.012 MPa, 72.806 MPa, and 185.535 MPa. The maximum stresses on the screws in Groups PM, PL, and PC were 278.265, 114.839, and 266.396 MPa, respectively. Conclusion: The results of this study revealed that titanium plates have good fixation effects in all groups; therefore, the use of the new plate for posterolateral tibial plateau fractures appears to be safe and valid. [ABSTRACT FROM AUTHOR]

Bone morphogenic protein 2 (BMP2) is known to induce osteogenesis and is applied clinically to enhance spinal fusion despite adverse effects. BMP2 needs to be used in high doses to be effective due to the presence of BMP2 inhibitors. L51P is a BMP2 analogue that acts by inhibition of BMP2 inhibitors. Here, we hypothesized that mixtures of BMP2 and L51P could achieve better spinal fusion outcomes regarding ossification. To test whether mixtures of both cytokines are sufficient to improve ossification, 45 elderly Wistar rats (of which 21 were males) were assigned to seven experimental groups, all which received spinal fusion surgery, including discectomy at the caudal 4–5 level using an external fixator and a porous β-tricalcium phosphate (βTCP) carrier. These βTCP carriers were coated with varying concentrations of BMP2 and L51P. X-rays were taken immediately after surgery and again six and twelve weeks post-operatively. Histological sections and µCT were analyzed after twelve weeks. Spinal fusion was assessed using X-ray, µCT and histology according to the Bridwell scale by voxel-based quantification and a semi-quantitative histological score, respectively. The results were congruent across modalities and revealed high ossification for high-dose BMP2 (10 µg), while PBS induced no ossification. Low-dose BMP2 (1 µg) or 10 µg L51P alone did not induce relevant bone formation. However, all combinations of low-dose BMP2 with L51P (1 µg + 1/5/10 µg) were able to induce similar ossificationas high-dose BMP2. These results are of high clinical relevance, as they indicate L51P is sufficient to increase the efficacy of BMP2 and thus lower the required dose for spinal fusion. Spinal fusion surgery is frequently applied to treat spinal pathologies. Bone Morphogenic Protein-2 (BMP2) has been approved by the U.S. Food and Drug Administration (FDA-) and by the "Conformité Européenne" (CE)-label. However, its application is expensive and high concentrations cause side-effects. This research targets the improvement of the efficacy of BMP2 in spinal fusion surgery. [Display omitted] [ABSTRACT FROM AUTHOR]

Featured Application: Interfragmentary movement is crucial in promoting callus formation during secondary fracture healing. Fixation stiffness is a critical factor, with excessive flexibility and rigidity hindering optimal healing. The concepts of flexible fixation, techniques for regulating implant stiffness, and material selection, favoring a lower Young's modulus like titanium alloys, are emphasized. A novel TiNbSn alloy with a low Young's modulus has been introduced as a potential solution that has shown efficacy in promoting osteosynthesis and superior mechanical properties. The bone healing process is influenced by various physiological factors. Fracture fixation traditionally relied on rigid metallic implants. However, excessively rigid constructs can lead to complications, necessitating revision surgery. This review focuses on approaches to improve bone healing by introducing adequate interfragmentary movement (IFM) at the fracture site. IFM promotes secondary fracture healing and callus formation. Studies suggest that rigid fixation may impair fracture healing by inhibiting callus formation and causing stress shielding. Titanium alloy locking plates have been shown to be biomechanically superior to stainless steel. Flexible fixation and techniques to regulate implant stiffness are crucial for managing fractures with bridge plating. Materials with a lower Young's modulus balance biomechanical properties. A novel TiNbSn alloy with a low Young's modulus has been developed to address stress shielding issues. It is effective in promoting osteosynthesis, bone healing, and superior mechanical properties compared with materials with higher Young's moduli. The enhanced formation of bone and callus associated with TiNbSn alloy suggests its promise for use in fracture treatment plates. Understanding the biomechanics of fracture healing, optimizing fixation stiffness, and exploring innovative materials like TiNbSn alloys, are crucial for advancing approaches to accelerate and enhance bone healing. [ABSTRACT FROM AUTHOR]

Proximal humerus fractures are common in clinical practice, and there are relatively a few studies on postoperative incision infections of such fractures. The purpose of this study was to explore the risk factors for surgical site infection (SSI) after internal fixation in patients with closed proximal humerus fractures. Patients with closed proximal humerus fractures who underwent surgery from January 2016 to January 2022 were retrospectively analysed. Cases with superficial or deep infections within 3 months after surgery were in the infection group and the remaining cases were in the non‐infection group. The types of pathogenic bacteria in the infection group were analysed. The potential risk factors for SSI in all patients were recorded: (1) patient‐related factors: gender, age, body mass index (BMI), smoking, comorbidities; (2) trauma‐related factors: mechanism of injury, Injury Severity Score, visual analogue scale, fracture type, soft tissue condition and combined dislocation; (3) laboratory‐related indexes: haemoglobin, albumin; (4) surgery‐related factors: time from injury to surgery, American Society of Anesthesiologists anaesthesia classification, surgical time, fixation mode, intraoperative blood loss, suture method, bone graft and postoperative drainage. The risk factors for the occurrence of SSI were analysed using univariate analysis and multivariate logistic regression. The incidence of SSI was 15.7%. The most common bacterium in the infection group was Staphylococcus aureus. High BMI (p = 0.033), smoking (p = 0.030), an increase in mean time from injury to definitive surgery (p = 0.013), and prolonged surgical time (p = 0.044) were independent risk factors for the development of SSI after closed proximal humeral fractures. In patients with closed proximal humerus fractures, weight loss, perioperative smoking cessation, avoidance of delayed surgery, and shorter surgical time may be beneficial in reducing the incidence of SSI. [ABSTRACT FROM AUTHOR]

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Copyright of Die Unfallchirurgie is the property of Springer Nature 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: Multi-comminuted, intra-articular fractures of the distal humerus still pose a challenge to modern orthopedics due to unsatisfactory treatment results and a high percentage (over 50%) of postoperative complications. When surgical treatment is chosen, such fractures are fixed using two plates with locking screws, which can be used in three spatial configurations: either parallel or one of two perpendicular variants (posterolateral and posteromedial). The evaluation of the fracture healing conditions for these plate configurations is unambiguous. The contradictions between the conclusions of biomechanical studies and clinical observations were the motivation to undertake a more in-depth biomechanical analysis aiming to indicate the weak points of two-plate fracture stabilization. Methods: Research was conducted using the finite element method based on an experimentally validated model. Three variants of distal humerus fracture (Y, λ, and H) were fixed using three different plate configurations (parallel, posterolateral, and posteromedial), and they were analyzed under six loading conditions, covering the whole range of flexion in the elbow joint (0–145°). A joint reaction force equal to 150 N was assumed, which corresponds with holding a weight of 1 kg in the hand. The biomechanical conditions of bone union were assessed based on the interfragmentary movement (IFM) and using criteria formulated by Steiner et al. Results: The IFMs were established for particular regions of all of the analyzed types of fracture, with distinction to the normal and tangential components. In general, the tangential component of IFM was greater than normal. A strong influence of the elbow joint's angular position on the IFM was observed, with excessive values occurring for flexion angles greater than 90°. In most cases, the smallest IFM values were obtained for the parallel plaiting, while the greatest values were obtained for the posteromedial plating. Based on IFM values, fracture healing conditions in particular cases (fracture type, plate configuration, loading condition, and fracture gap localization) were classified into one of four groups: optimal bone union (OPT), probable union (PU), probable non-union (PNU), and non-union (NU). Conclusions: No plating configuration is able to ensure distal humerus fracture union when the full elbow flexion is allowed while holding a weight of 1 kg in the hand. However, flexion in the range of 0–90° with such loadings is acceptable when using parallel plating, which is a positive finding in the context of the early rehabilitation process. In general, parallel plating ensures better conditions for fracture healing than perpendicular plate configurations, especially the posteromedial version. [ABSTRACT FROM AUTHOR]

Purpose: The treatment of unstable atlas fractures remains a controversial topic. The study aims at assessing the prognosis and efficacy of osteosynthesis for unstable atlas fractures through a review of the current literature and additionally aims to compare outcomes between the transoral and posterior approaches. Methods: A systematic review of databases including PubMed, EMBASE, Cochrane, Web of Science, CNKI, and Wanfang was conducted. Titles and abstracts were screened by two reviewers to identify studies meeting pre-defined inclusion criteria for comprehensive analysis. Results: The systematic review included 28 articles, 19 employing the posterior approach and 9 utilizing the transoral approach. It covered osteosynthesis in 297 patients with unstable atlas fractures, comprising 169 treated via the posterior approach and 128 via the transoral approach. Analysis revealed high healing rates and clinical improvement in both approaches, evidenced by improvements in the visual analog scale, range of motion, atlantodens interval, and lateral displacement distance post-surgery. Conclusion: Osteosynthesis offers effective treatment for unstable atlas fractures. Both transoral and posterior approaches can achieve good clinical outcomes for fracture, and biomechanical studies have confirmed that osteosynthesis can maintain the stability of the occipitocervical region, preserve the motor function of the atlantoaxial and occipito-atlantoaxial joints, and greatly improve the quality of life of patients. However, variations exist in the indications and surgical risks associated with each method, necessitating their selection based on a thorough clinical evaluation of the patient's condition. [ABSTRACT FROM AUTHOR]

Purpose: It is generally accepted that a radial head fracture (RHF) with more than three parts is not suitable for repair; therefore, most authors suggest straightforward radial head arthroplasty (RHA). With up to 20% risk for reoperation after RHA, improvement in reduction and fixation techniques may represent a valuable alternative before further extending the indications for arthroplasty. To determine the functional results and radiological failure rate after osteosynthesis of multi-fragmentary RHF with more than three articular fragments. We specifically determined (1) the one-year Broberg and Morrey functional elbow score, (2) duration of fracture healing, (3) complication rate, and (4) number of patients converted to RHA. Methods: This study is a retrospective single-center case series. All patients who underwent primary osteosynthesis for RHF between 2012 and 2019 were included. Nine patients with an average age of 52 years had an average clinical and/or radiological follow-up of 49 months. Results: The preoperative imaging identified nine fractures with four fragments. Three patients underwent osteosynthesis with plates and screws, whereas six patients underwent osteosynthesis with only screws. The mean Broberg and Morrey score was 95 points. Overall, eight of the nine patients had satisfactory results. All patients retained their radial heads and showed radiological fracture healing. Only two patients presented with low-grade complications requiring no further surgery. Conclusion: Our study showed that osteosynthesis of RHF with up to four fragments can achieve good functional results with a low complication rate and seems to be a valid alternative to RHA. [ABSTRACT FROM AUTHOR]

Background: Calcaneal fractures are often major injuries associated with considerable morbidity. The optimal surgical management of displaced calcaneal fractures remains contentious with open, percutaneous and arthroscopically assisted percutaneous approaches all offering potential benefits for patients. The aim of this study was to assess which of these three separate surgical approaches to the management of displaced calcaneal fractures provides the best radiographic deformity correction. Methods: This is a retrospective observational study of all calcaneal fractures undergoing operative fixation at a single major trauma centre in the UK. The primary outcome was pre- and post-operative assessment of the deformity correction using radiographic parameters (angle of Gissane and Bohler's angle). Secondary outcomes included fracture configuration, complications and re-operation rate. Results: Between 01/01/2009 and 31/12/2019, 152 calcaneal fractures in 134 patients underwent operative management via either an open or percutaneous approach. One-way ANOVA testing of the pre- and post-operative radiographic parameters demonstrated that an open approach offered superior post-operative correction of Bohler's angle when compared to percutaneous alone (p < 0.05); however, there was no difference in post-operative angle of Gissane (p > 0.05). The mean follow-up for complication and re-operation data was 3.5 years (range 0.1–12.4). Overall complication rate following all surgical fixation was 7.2% with a further 32.2% requiring further long-term surgical intervention for subtalar arthritis or removal of metalwork. Conclusion: Arthroscopically assisted percutaneous fixation does not offer superior radiographic deformity correction compared to percutaneous technique alone. Open fixation yielded improved correction of Bohler's angle when compared to percutaneous alone; however, there was no difference in post-operative angle of Gissane. Level of evidence: III. [ABSTRACT FROM AUTHOR]

This study aimed to share our experience of a self-developed plate for acetabular fracture fixation through the presentation of clinical cases. Eight patients with complex acetabular fractures (Letournel classification) underwent surgery using a modified Stoppa approach and the novel plate design between 2021 and 2023 at the National Scientific Center for Traumatology and Orthopedics. Criteria such as the mechanism of injury, type of fracture, surgical approach, intraoperative and postoperative complications, quality of reduction, and functional and radiological results were evaluated. All patients included in the study presented complex types of acetabular fractures according to the Letournel classification. In all cases, surgical interventions were performed using a modified Stoppa approach. The assessment of reduction quality was conducted based on the radiological standards established by Matta. The reduction in quality was excellent in two patients, good in four, and satisfactory in two. One patient developed a post-traumatic false joint requiring additional surgery. The remaining patients achieved fracture healing with satisfactory Harris Hip Score (HHS) scores, indicating good overall function. The results of the self-developed plate for acetabular fracture fixation in our series were satisfactory. [ABSTRACT FROM AUTHOR]

Osteosynthesis in fracture treatment typically uses hardware that remains in the patient's body, which brings a permanent risk of negative side effects such as foreign body reactions or chronic inflammation. Bioabsorbable materials, however, can degrade and slowly be replaced by autologous bone tissue. A suitable material is requested to offer great biocompatibility alongside excellent mechanical properties and a reasonable corrosion rate. Zinc–silver alloys provide these characteristics, which makes them a promising candidate for research. This study investigated the aptitude as a bioabsorbable implant of a novel zinc–silver alloy containing 3.3 wt% silver (ZnAg3). Here, the tensile strength as well as the corrosion rate in PBS solution (phosphate buffered solution) of ZnAg3 were assessed. Furthermore, shear tests, including fatigue and quasi-static testing, were conducted with ZnAg3 and magnesium pins (MAGNEZIX®, Syntellix AG, Hannover, Germany), which are already in clinical use. The detected corrosion rate of 0.10 mm/year for ZnAg3 was within the proposed range for bioabsorbable implants. With a tensile strength of 237.5 ± 2.12 MPa and a shear strength of 144.8 ± 13.2 N, ZnAg3 satisfied the mechanical requirements for bioabsorbable implants. The fatigue testing did not show any significant difference between ZnAg3 and magnesium pins, whereas both materials withstood the cyclic loading. Thus, the results support the assumption that ZnAg3 is qualified for further investigation. [ABSTRACT FROM AUTHOR]

Copyright of Die MKG-Chirurgie is the property of Springer Nature 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.)

Copyright of Die MKG-Chirurgie is the property of Springer Nature 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.)

The shear fractures of the capitellum are rare fractures in the pediatric population. Their diagnosis is challenging because of the high cartilaginous component of the growing elbow, requiring a high level of clinical suspicion especially in the case of small osteochondral or chondral fragments. The literature on capitellar shear fractures is mainly represented by case reports, which provides a patchy view of the topic. For this reason, we aimed to draw a narrative review presenting the available management strategies and their outcomes, and present two cases treated in our institution.

IntroductionAcetabular fractures are among the most challenging injuries in traumatology. The complex anatomy usually requires extensive surgical approaches baring the risk for iatrogenic damage to surrounding neurovascular structures. As a viable alternative, minimally invasive endoscopic techniques have emerged during the recent years. This paper reports on the feasibility of different coupling mechanisms for a novel suprapectineal plate especially designed for minimally invasive acetabular surgery.MethodsA total number of 34 participants contributed to the present study, who differed in their arthroscopic and surgical experience. A laparoscopic model was used to compare four different coupling mechanisms by the number of failed attempts, the time required for plate fixation, the influence of surgical experience as well as the learning success for each individual coupling mechanism. Moreover, the feasibility of each mechanism was evaluated by a questionnaire.ResultsThe results demonstrate that plates employing grooved and pressure-sliding coupling mechanisms exhibit fewer failed attempts and reduce trial times, especially in contrast to sole sliding mechanisms. Furthermore, our study revealed that proficiency in endoscopic procedures significantly influenced the outcome. Notably, the subjective evaluation of the participants show that the pressure base and pressure-slide base plate designs are the most supportive and feasible designs.ConclusionsIn summary, the present study evaluates for the first-time different plate and coupling designs for minimal-invasive surgery, indicating a superior feasibility for plates with a grooved and pressure-sliding mechanism.

Introducción En los últimos años, la cirugía ha ganado relevancia en el tratamiento de las fracturas del extremo distal del radio (FEDR). Dentro de las técnicas quirúrgicas, la osteosíntesis con placa mínimamente invasiva (minimally-invasive plate osteosynthesis, MIPO, en inglés) está en auge, y se han incrementado sus indicaciones respecto a la técnica convencional.

Aims: Post-traumatic periprosthetic acetabular fractures are rare but serious. Few studies carried out on small cohorts have reported them in the literature. The aim of this work is to describe the specific characteristics of post-traumatic periprosthetic acetabular fractures, and the outcome of their surgical treatment in terms of function and complications. Methods: Patients with this type of fracture were identified retrospectively over a period of six years (January 2016 to December 2021). The following data were collected: demographic characteristics, date of insertion of the prosthesis, details of the intervention, date of the trauma, characteristics of the fracture, and type of treatment. Functional results were assessed with the Harris Hip Score (HHS). Data concerning complications of treatment were collected. Results: Our series included 20 patients, with a mean age of 77 years (46 to 90). All the patients had at least one comorbid condition. Radiographs showed that 75% of the fractures were pure transverse fractures, and a transverse component was present in 90% of patients. All our patients underwent surgical treatment: open reduction and internal fixation, revision of the acetabular component, or both. Mean follow-up was 24 months, and HHS at last follow-up was 75.5 (42 to 95). The principal complications observed were dislocations of the prosthesis (30%) and infections (20%). A need for revision surgery was noted in 30% of patients. No dislocation occurred in patients undergoing osteosynthesis with acetabular reconstruction. We did not note either mechanical loosening of the acetabular component nor thromboembolic complications. In all, 30% of patients presented acute anemia requiring transfusion, and one death was reported. Conclusion: Post-traumatic periprosthetic acetabular fractures frequently have a transverse component that can destabilize the acetabular implant. The frequency of complications, principally dislocations, led to a high rate of revision surgery. Improvements in preoperative planning should make it possible to codify management to reduce this high rate of complications. The best results were obtained when the surgical strategy combined osteosynthesis with acetabular reconstruction. Cite this article: Bone Jt Open 2024;5(1):28–36.

Abstract Background Displaced lateral malleolus fractures are typically stabilised through open reduction and internal fixation. The biomechanically and clinically efficacy of locking plates and lag screws, particularly in Weber A and B distal fibular fractures remains a subject of contention. This study examines two locking plate designs for lateral malleolus fractures, evaluating their performance with and without interfragmentary screws using finite element models. Methods Utilising CT images of a healthy adult male volunteer, a three-dimensional finite element model was constructed. The Fibula-specific Flank Multiaxial Locking Anatomic Plate (FMLP) and the Conventional Locking Plate (CLP) were subjected to stabilisation, both with and without an interfragmentary screw, mimicking the Danis-Weber A and B lateral malleolus oblique fracture fixation. Loads of 140 N and 70 N, equivalent to 20% of the body weight, were applied to simulate the single-leg and two-leg standing conditions in the axial direction. The von Mises stress (VMS) distributions and element displacements were subsequently analyzed. Results In the Danis-Weber A fracture model group, the FMLP with an interfragmentary screw fixation exhibited the lowest peak VMS values: 51.9 MPa in the fibula, 89.0 MPa in the plate, and 61.3 MPa in the screws for simulating single-leg conditions. Under two-leg standing conditions, these peak VMS values decreased to 25.9 MPa in the fibula, 44.5 MPa in the plate, and 30.6 MPa in the screws, respectively. Furthermore, the overall structural peak displacements during single-leg standing for both Weber-A and B fractures with different implants ranged from 1.61 to 2.54 mm. While standing on two feet, the ranged was from 0.80 to 1.27 mm. An interfragmentary screw at the oblique fracture site resulted in reduced the peak value of VMS in the fibula, plate, screws, consequently decreased the overall structural displacement for FMLP and CLP fixation in lateral malleolus fractures. Conclusions The current finite element analysis (FEA) demonstrates that FMLP exhibits superior mechanical characteristics in Danis-Weber A and B lateral malleolus fractures compared to CLP. The inclusion of an interfragmentary screw, combined with locking plate design, enhances stability for simple oblique distal fibular fractures. The FMLP presents itself as potential as an alternative for lateral malleolus fractures from a biomechanical perspective. Nevertheless, further verification of these results is imperative through subsequent clinical studies.

Abstract Background Patellar fractures have a comparatively low incidence compared to all fracture frequencies of the musculoskeletal system. However, surgical management is crucial to prevent postoperative complications that affect the knee joint. The purpose of the present study was to evaluate the incidence of postoperative complications and onset of postoperative osteoarthritis related to the chosen technique of patellar fracture management. Methods In a retrospective cohort study consecutive managed, isolated patella fractures were reviewed for demographic data, trauma mechanism, patella fracture type, fixation technique and postoperative complications. The results were documented radiographically and clinically and analysed statistically. The reporting followed the STROBE guidelines. Results A total of 112 patients were eligible for data evaluation. Surgical management of comminuted patellar fractures with small fragment screws showed significant fewer postoperative complications compared to other fixation techniques (8%, p

Abstract Osteoporosis is a common disease that leads to a reduction in bone density and increases the risk of fractures. Stable surgical treatment is particularly important for these fractures. The aim of this study was to examine the influence of bone density in the area of ​​the proximal ulna on the failure of the fixation technique of K-wires in tension band wiring (TBW). We provided 10 ulna specimens with TBW and biomechanically examined the pull-out strength of bi- and tricortical K-wires. Bone density measurement was performed using qCT. In the paired t-test, the tricortical group showed a significantly higher pull-out strength in relation to bone density than the bicortical group (p = 0.001). Furthermore, the Pearson correlation showed a high influence of bone density on pull-out strength in the tricortical group (r = 0.544), but without significance (p = 0.100). Our work shows that bone density has a direct effect on the pull-out strength of K-wires in TBW. TBW should therefore be used as osteosynthesis technique, especially in young patients with non-osteoporotic bones. In the case of osteoporotic fractures, alternative procedures should be preferred.

Background: Distal forearm fractures were defined as distal radius fractures with concomitant distal ulna fractures, except ulna styloid fractures. Distal forearm fractures are common among geriatric populations, particularly those with osteoporosis. Conventionally, distal forearm fractures are reduced by a double incision approach; however, malreduction and instability of the distal radioulnar joint were not uncommon. We introduced a modified volar dual window approach to treat the distal forearm fracture and evaluate the functional outcomes and complications. Methods: From January 2020 to June 2023, 13 patients with distal forearm fractures underwent open reduction by the modified dual window approach with locking plate fixation. After surgery, splints were applied for two weeks, and the patients underwent postoperative hand therapy for three months. The mean Quick Disabilities of the Arm, Shoulder, and Hand scores, range of motions, grip strength, postoperative radiographic parameters, and complications data were collected. Results: The mean follow-up period was 12.1 months, and the mean age was 52.3 years. Average wrist flexion was 67°, extension 69°, pronation 81°, and supination 79°. Grip strength was 28.3 ± 11.5 kg, which was 88% of the uninjured opposite side. The Visual Analog Scale score during activities was recorded as 0.5 ± 0.9. The mean Quick Disabilities of the Arm, Shoulder, and Hand score was 14 ± 11.5. The postoperative radiographic parameters were as follows: radial height: 10.8 ± 1.7 mm, radial inclination: 22.6 ± 3.7°, volar tilting: 4.0 ± 3.9°, and ulnar variance: −0.4 ± 1.4 mm. All the patients achieved bone union at the final follow-up. Two patients underwent ulnar implant removal due to irritation symptoms. Neither infection, nor neurovascular injury, nor malreduction developed in these patients. Conclusions: The modified volar dual window approach can achieve good wrist function and distal forearm fracture reduction without increasing neurovascular or wound healing complications. This method is an alternative approach for distal forearm fracture, especially in comminuted distal ulna fracture or distal radioulnar joint incongruity.

The surgical treatment of Jefferson fractures generally involves solid fusion, which limits the range of motion of the upper cervical spine. Herein, we present a case of a Jefferson fracture that was surgically treated using direct C1 posterior arch screw reduction and osteosynthesis instead of fusion surgery. Postoperative computed tomography (CT) and plain radiography revealed that both C1 posterior arch screws were well positioned, and placing lag screws at the C1 level played a key role in fracture reduction. The present case highlights a surgical technique, which can preserve neck motion by using lag screws for reduction and osteosynthesis. [ABSTRACT FROM AUTHOR]

AbstractA predictive finite element model was developed to investigate the best configuration of a fixation pins system consisting of two K-wires inserted in a synthetic model (Sawbones®) at different angles and secured to a connecting rod. Two key parameters were considered to determine the best configuration delivering the higher pull-out strength and lower pull-out length: the diameter and insertion angle. Results show that as the diameter and insertion angle increased, the pull-out force increased, while the pull-out length decreased. Results are successfully compared with available experimental data in literature. This model can be used as an alternative to experimental study. [ABSTRACT FROM AUTHOR]

The incidence of articular injury, particularly osteochondral fractures (OCFs), has seen a cinnotable increase in recent years. Regardless of their location, fragments can be overlooked by plain radiographs, which might lead to osteoarthritis in the long run. Diagnostic imaging has a pivotal role in the assessment and classification of the fracture severity, as well as the presence of any associated dislocations. These fractures require surgical intervention for the restoration of joint function and the reduction of long-term complications. This paper aims to present the surgical correction and post-operative treatment of osteochondral fractures with absorbable implants in four children. The following affected areas are discussed: lateral condyle of the femur, patella and radial head. Utilising absorbable implants for the management of OCFs provides numerous advantages, including the elimination of the need for re-anaesthesia and reoperation, reduction of complications and facilitation of early rehabilitation. This approach also minimises the period of hospitalisation and proves effective in pediatric OCF treatment. [ABSTRACT FROM AUTHOR]

Background: Longitudinal patellar fractures are uncommon in veterinary orthopedics routine. These fractures directly affect pelvic limb movements and can result in joint incongruity and potentially degenerative joint disease. Surgical repair is necessary to preserve the quadriceps extensor mechanism and reduce possible complications. This paper describes the clinical status of a cat suffering from a longitudinal patellar fracture, the surgical procedure used to repair and stabilize the bone, and the postoperative outcomes during the animal's different healing phases. Case: One cat with a longitudinal patellar fracture of the left pelvic limb was treated at the Veterinary Hospital of the Federal University of Santa Maria (UFSM), in the state of Rio Grande do Sul, Brazil. The patient was diagnosed based on physical and radiographic examinations of the affected pelvic limb. Under anesthesia, the patella was subjected to osteosynthesis using cerclage wire and to trochlear sulcoplasty to prevent luxation. The veterinarian recommended postoperative rest and basic care involving hygiene of the surgical wound. After 60 days, the cat was brought back to the hospital for radiographic reassessment to verify the osseous consolidation of the patella. The X-ray exam revealed non-consolidation of the bone fragments, despite the cemented implant and the proper joining of the fragments. However, although the fracture did not consolidate, the animal exhibited clinical improvement of its lameness. Discussion: Longitudinal fractures are rare and the literature contains few reports about them. It is believed that cats are more likely to present longitudinal fractures after direct blows that cause compression of the patella over the trochlear groove, since the patella in this species is relatively wider and smoother than that of dogs. The literature still lacks a clear description of the causal mechanism of longitudinal fractures; however, but the main causes may vary according to the clinical presentation. The choice of the best method to treat patellar fractures still poses a challenge, since several methods have been described, depending on how the fracture presents. Regardless of the choice of treatment, the techniques for surgical repair of patellar fractures must involve the following steps: the fracture must be reduced, the fragments kept in apposition until the fracture closes, the soft tissues are healed, and the knee function restored. The cat's patellar fracture was repaired with cerclage wire to restore its anatomical normality, reducing the fracture and stabilizing the bone fragments in order to immobilize them and ensure proper better bone healing. Maintenance and approximation of the lateral fragment of the longitudinal fracture, in conjunction with sulcoplasty, were proposed to ensure greater contact between the patella and the trochlear groove, thereby reducing the possibility of luxation. Despite the non-consolidation of the fracture, the fragment remained intact and immobile, and no post-surgical complications were reported. This confirmed the success of the technique employed to bring together the patellar fragments of the lateral longitudinal fracture, even in the absence of bone callus formation. Moreover, the technique proved to be simple and resulted in complete joint stability after 60 days. This is therefore an important tool for patellar fractures, whose lateral longitudinal fragment was retained, allowing for correct approximation and fragment immobilization, without the need for excision by partial patellectomy. [ABSTRACT FROM AUTHOR]

Background and objective. Most of the activities of daily life are carried out with our hands; hand fractures represent 10% of all skeletal injuries and are caused by high energy trauma. The main complication is the stiffness of the hand, and an ideal treatment must produce an adequate reduction, limit pain, minimize scarring and start mobility as soon as possible. Methods. A retrospective review of 10 patients operated on for a distal phalanx fracture between January and June 2023 was carried out through the application of 2.4 and 1.7 mm cannulated screws for transverse and oblique strokes, respectively. Results. Patients presented an adequate reduction, minimal pain and began rehabilitation between 10 and 14 days after surgery; did not present complications and had adequate mobility at the end of rehabilitation. Conclusion. In our experience, management with cannulated screws of the distal phalanx fractures has shown an adequate reduction, requires little surgical time, is placed percutaneously, and favors early mobility, preventing the appearance of rigidity. [ABSTRACT FROM AUTHOR]

Joint replacement is a common surgery and is predominantly utilized for treatment of osteoarthritis in the aging population. The longevity of many of these implants depends on bony ingrowth. Here, we provide an overview of current techniques in osteogenesis (inducing bone growth onto an implant), which is affected by aging and inflammation. In this review we cover the biologic underpinnings of these processes as well as the clinical applications. Overall, aging has a significant effect at the cellular and macroscopic level that impacts osteosynthesis at bone-metal interfaces after joint arthroplasty; potential solutions include targeting prolonged inflammation, preventing microbial adhesion, and enhancing osteoinductive and osteoconductive properties. [ABSTRACT FROM AUTHOR]

The article investigates into the influence of somatic pain syndrome during osteosynthesis on dogs' clinical parameters and haemostasis. It was found, that the best variant for osteosynthesis operations in dogs is acepromazinebutorphanol- propofol-ketamine anaesthesia. This regimen has provided complete analgesia in half the time recovery of dogs without significant changes in heart rate (HR), respiratory rate (RR), blood pressure (BP), and haemoglobin saturation (SpO2) during surgery. Acepromazine-ketaminethiopental anaesthesia has showed pronounced analgesia with a decrease in HR and BP. Xylazine-ketamine-thiopental anaesthesia, under apparent analgesia, led to hypotension (decreased HR, BP) and hypoxia (decreased RR, SpO2). The hypercoagulable syndrome was recorded in dogs of all experimental groups before surgery. It indicates the urgent need for its correction in the postoperative period. The data obtained will optimize the selection of drugs' combinations for dogs' anaesthesia, taking into account the type of pain response. [ABSTRACT FROM AUTHOR]

Purpose: Verify if the use of locking plates in displaced three- and four-part proximal humerus fractures has meant an improvement even in patients over 70 years of age. Material and methods: We performed surgery with locking plate fixation in 56 consecutive patients with three- and four-part proximal humerus fractures according to Neer's classification between 1/1/15 and 12/31/20 at our Hospital. Patient satisfaction, quality of life, functionality and radiological variables, as well as the comparison between patients older and younger than 70 years were the main outcomes. Likewise, factors and complications that may have influenced these variables were analyzed as secondary outcomes. The analysis of all these variables was performed after a minimum follow-up time of 24 months after surgery. Results: 51 patients (92%) ended up satisfied or very satisfied according to the SF-36 test and with no disability or mild disability according to the DASH Score questionnaire. 46 patients (82%) obtained a satisfactory or excellent result according to the Neer scale modified by Cofield and 38 (68%) a good or excellent function according to the Constant Murley questionnaire. In 47 cases (84%) good radiological alignment was observed. Complications occurred in 20 patients (36%). The complications and the results of the SF-36, DASH Score, Neer scale modified by Cofield and Constant Murley tests depended on the radiological alignment (p = 0.009, p = 0.006, p = 0.025, p = 0.0008 and p = 0.0004). There were 37 patients younger than 70 years and 19 older than 70 years with no statistically significant differences when comparing the two groups. Conclusions: This study demonstrates that satisfactory results can be obtained with osteosynthesis with locking plates in displaced proximal humerus fractures even in patients older than 70 years of age. Level of evidence III: Retrospective Cohort, Treatment Study. [ABSTRACT FROM AUTHOR]

Purpose: Proximal humeral fractures cause large intramedullary bone defects after humeral-head reduction. Hydroxyapatite/poly-l-lactide (HA/PLLA) materials are widely used for various fractures. However, the efficacy of endosteal strut using a HA/PLLA mesh tube (ES-HA/PLLA) with a locking plate for treating proximal humeral fractures was not reported. The purpose of this study is to examine the efficacy of ES-HA/PLLA with a proximal humeral locking plate in proximal humeral fractures. Methods: Seventeen patients with proximal humeral fractures treated using ES-HA/PLLA with a locking plate from November 2017 to November 2021 were evaluated. The range of motion of the shoulder and postoperative complications were assessed at the final follow-up. Radiographs were evaluated to assess bone union and loss of reduction by measuring humeral-head height (HHH) and humeral neck-shaft angle (NSA). Results: The average flexion and external rotation of the shoulder at the final follow-up were 137° (range, 90–180°) and 39° (range, − 10 to 60°), respectively. All fractures were united. The average HHH and NSA just after the surgery and final follow-up were 12.5 mm and 11.6 mm and 129.9° and 127.4°, respectively. Two patients presented screw perforation of the humeral head. One patient underwent implant removal due to infection. Avascular necrosis of the humeral head was observed in one patient with arthritis mutilans. Conclusions: The use of ES-HA/PLLA with a proximal humeral locking plate resulted in bone union in all patients and prevented postoperative loss of reduction. ES-HA/PLLA is one of the treatment options for proximal humeral fractures. [ABSTRACT FROM AUTHOR]

Femoral head fractures are a rare injury with limited information in the literature. Recent studies have been based on small case series, indicating that the incidence of fractures in hip dislocation varies from 7 to 18 %. Fractures of the femoral head are classified according to Pipkin. Treatment is often accompanied by significant complications, and the choice of the optimal treatment method remains a matter of debate. The choice of treatment tactics affects the duration of treatment and functional outcome. The article presents the results of treatment of patients whose treatment tactics were based on the Pipkin classification. Objective. To substantiate the use of the Pipkin classification of femoral head fractures in the selection of treatment and diagnostic tactics. Methods. The study was performed by evaluating the results of treatment in 44 patients. The Pipkin classification was used to determine the treatment tactics. The results were evaluated according to the HHS scale. The results were statistically analysed by comparing the median scores for different groups using the Mann-Whitney U test. Results. The worst prognosis was for patients with Pipkin III and Pipkin IV fractures. HHS scores for patients with complicated outcomes are worse than for patients with uncomplicated outcomes. Treatment outcomes for Pipkin type III fractures are statistically significantly lower than for other types. Conclusions. Pipkin fractures are a rare and severe injury that can cause significant limb dysfunction with proper treatment. Treatment of Pipkin type I and type II includes immediate reduction of the dislocation and conservative treatment in case of satisfactory fragmentation or open reduction with metal osteosynthesis for displaced fractures; for type III and IV, open reduction and osteosynthesis are possible for young patients, and primary arthroplasty is recommended for patients over 60 years of age or with concomitant metabolic diseases. [ABSTRACT FROM AUTHOR]

Due to the military aggression of the Russian Federation against Ukraine, a large number of soldiers and civilians were wounded and injured. Along with fractures of the long bones of the limbs, skull injuries, limb amputations, the number of injuries in the pelvic area with fractures of the pelvic bones as a result of being hit by high-velocity projectiles (shrapnel, bullets) has increased. This work is devoted to the preparation and research of the characteristics of stiffness and reliability of fixation of complex fractures of the pelvic bones in the area of the sacroiliac joint and the upper and lower branches of the pubic bone, which may occur as a result of injury by high-velocity projectiles that injure. The sacroiliac area was fixed with two cancellous screws with a parallel arrangement at the intersection of the horizontal and vertical planes (a typical technique for stabilizing the posterior parts of the pelvis). The anterior parts of the pelvic bones were stabilized with rod devices of external fixation with a typical location of the rods in the upper anterior iliac spine. The upper branch of the pubic bone was synthesized with a bony reconstructive plate with a typical location. [ABSTRACT FROM AUTHOR]

A separate direction in osteosynthesis is the study on the possibilities of bone union after tumor resection. In this regard, the issue of using implants made of metals, polymers, and carbon, which have a high bone binding affinity, is on the agenda for modern oncological orthopedics. Studying carbon composite materials has shown practical effectiveness of their medical use, in particular in orthopedics and traumatology, that can be applied to replace bone defects in oncological traumatology. Aim. To determine the possibility of using carbon composite materials in the femur defect replacement after tumor resection. Clinical case. A case of using an implant made of the carbon composite material for a patient with right femur osteosarcoma and a pathological femoral middle-third fracture is presented. The study was carried out in accordance with the principles of the Declaration of Helsinki. The patient signed the written informed consent form for the study. Conclusions. The results of using the implant made of the carbon composite material have shown its permeability to X-rays and potential use for bone defect replacement in oncological traumatology. [ABSTRACT FROM AUTHOR]

Background: Displaced lateral malleolus fractures are typically stabilised through open reduction and internal fixation. The biomechanically and clinically efficacy of locking plates and lag screws, particularly in Weber A and B distal fibular fractures remains a subject of contention. This study examines two locking plate designs for lateral malleolus fractures, evaluating their performance with and without interfragmentary screws using finite element models. Methods: Utilising CT images of a healthy adult male volunteer, a three-dimensional finite element model was constructed. The Fibula-specific Flank Multiaxial Locking Anatomic Plate (FMLP) and the Conventional Locking Plate (CLP) were subjected to stabilisation, both with and without an interfragmentary screw, mimicking the Danis-Weber A and B lateral malleolus oblique fracture fixation. Loads of 140 N and 70 N, equivalent to 20% of the body weight, were applied to simulate the single-leg and two-leg standing conditions in the axial direction. The von Mises stress (VMS) distributions and element displacements were subsequently analyzed. Results: In the Danis-Weber A fracture model group, the FMLP with an interfragmentary screw fixation exhibited the lowest peak VMS values: 51.9 MPa in the fibula, 89.0 MPa in the plate, and 61.3 MPa in the screws for simulating single-leg conditions. Under two-leg standing conditions, these peak VMS values decreased to 25.9 MPa in the fibula, 44.5 MPa in the plate, and 30.6 MPa in the screws, respectively. Furthermore, the overall structural peak displacements during single-leg standing for both Weber-A and B fractures with different implants ranged from 1.61 to 2.54 mm. While standing on two feet, the ranged was from 0.80 to 1.27 mm. An interfragmentary screw at the oblique fracture site resulted in reduced the peak value of VMS in the fibula, plate, screws, consequently decreased the overall structural displacement for FMLP and CLP fixation in lateral malleolus fractures. Conclusions: The current finite element analysis (FEA) demonstrates that FMLP exhibits superior mechanical characteristics in Danis-Weber A and B lateral malleolus fractures compared to CLP. The inclusion of an interfragmentary screw, combined with locking plate design, enhances stability for simple oblique distal fibular fractures. The FMLP presents itself as potential as an alternative for lateral malleolus fractures from a biomechanical perspective. Nevertheless, further verification of these results is imperative through subsequent clinical studies. [ABSTRACT FROM AUTHOR]

The middle third of the face can be seriously compromised functionally and aesthetically, through the more complex traumas of Le Fort I, II and III. We can find associated and isolated fractures, such as zygoma, orbit, maxilla and nasal bones. Fractures are treated through surgical reconstruction of the deepest bones to the most external ones using titanium plates and screws, reconstructing the middle third of the face, as well as restoring the patient's functionality and aesthetics. This case report article aims to describe the importance of treating fractures and facial reconstruction in a patient with associated Le Fort I and II, in addition to its diagnosis and prognosis. [ABSTRACT FROM AUTHOR]

Purpose of the Study: Femoral neck fracture osteosynthesis is usually performed by using dynamic hip screw (DHS) or multiple parallel cannulated screws (MCS). In orthopedic surgery training, certain hip fractures are one of the most common operations performed by residents. It has been questioned, whether residents can provide as safe treatment and patient outcomes as those of more experienced surgeons. The aim of this study was to evaluate the effect of surgical experience on risk of complications by comparing the surgical performance and clinical outcomes in femoral neck osteosyntheses between surgical residents and orthopaedic surgeons. Methods: All patients with femoral neck fracture admitted to Helsinki and Uusimaa Hospital District (HUS) Hyvinkää Hospital from 2011 to 2016 were collected as research material. 88 hip fractures (87 patients) treated with DHS or MCS osteosyntheses were included in this study. The patients were divided into 2 groups, based on the surgeon's experience: an orthopedic surgeon group (n = 68) and a surgical resident group (n = 20). All data from complications, reoperations, and the duration of operations were collected. Results: There was no significant difference in characteristics of operated patients between orthopaedics and residents group. There was no significant difference in complications or re-operations between groups (p = 0.4, p = 0.2). Surgical residents had statistically longer surgical time (mean 76 min, 95% CI 62.92 min, mean 46 min, 95% Cl 42.51 min; p-value < 0.001). Still surgical time was not a risk factor for complication (p-value 0.5). Conclusion: Our results show that surgical residents´ outcomes in femoral neck fracture osteosynthesis seem to be as favorable as those of orthopedic surgeons; the operations just last slightly longer. [ABSTRACT FROM AUTHOR]

Background: Foot deformities in children are common, and the majority can be treated conservatively. Nevertheless, there are deformities that require surgical treatment. These include rigid clubfeet, severe forms of pes planovalgus, pes cavus and several more. We retrospectively analysed the pseudarthrosis rate of surgical treatment of foot deformities with transcutaneous K-wire osteosynthesis in neurologically healthy children and adolescents. The aim of the study was to show that the results with K-wires are comparable to those with other osteosynthesis methods in the literature. Methods: A total of 46 paediatric patients aged 6 to 17 years treated between January 2010 and December 2015 met the inclusion criteria. Depending on the diagnosis, different surgical interventions were necessary. In clubfoot and pes planovalgus, representing n = 81, 70% of the whole collective triple arthrodesis with fusion of the talonavicular, calcaneocuboid and subtalar joints or Evans osteotomy was usually performed. Radiographs were taken at least 6 months post-surgery, and bony consolidation of the subtalar, talonavicular (TN), and calcaneocuboidal (CC) joints and the metatarsal I (MT I) osteotomy were assessed. If there was no evidence of fusion at this time, it was considered non-union. Results: In total, 117 arthrodesis procedures with K-wires were performed. Overall, 110 of the arthrodesis (94%) healed, and only 7 joints (6%) showed non-union (subtalar 0%, TN 7.7%, CC 6.5% and MT I 6.7%). All non-unions occurred in subjects with clubfoot deformities. No significant risk factors were observed. Conclusion: This study replicated the good consolidation rates reported in the literature with screws, plates, intramedullary nails or staples in arthrodesis of the adolescent foot in neurologically healthy subjects and confirmed the efficacy of K-wires. The main advantages of transcutaneous K-wire treatment are easy metal removal, lower osteosynthesis material costs and less concomitant damage. Further studies, especially randomised controlled trials, are needed to further investigate this topic. [ABSTRACT FROM AUTHOR]

Objective. Periprosthetic tibial fractures are rare injuries with few studies in the literature. With an increasing number of total knee arthroplasties performed, these injuries are expected to become more common. These fractures are difficult to treat due to complex fracture morphology, high proportions of injuries associated, and the variability of injury patterns. The aim of this work is to report our experience and results in the fixation of Felix type IIIA periprosthetic tibial fractures. Methods. We treated by osteosynthesis three patients who sustained a Felix type IIIA periprosthetic tibial fracture using three different devices. Patients were clinically and radiographically followed up at 1, 3, 6, and 12 months from the surgery. Results. All patients had a good clinical and radiographic outcome with almost complete recovery of joint function. Complete bone healing was radiographically seen on average 6 months after surgery. No signs of infection were observed. Conclusions. Although the incidence of periprosthetic tibial fractures is growing, evidence-based guidelines for their treatment are still lacking. We report our experience in the treatment of these complex fractures, but larger studies in this area are needed to better guide our knowledge and choices of treatment. [ABSTRACT FROM AUTHOR]

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Copyright of Operative Orthopädie und Traumatologie is the property of Springer Nature 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.)