International journal of oral and maxillofacial surgery最新文献

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Mandibular reconstruction with a custom-made CAD/CAM porous titanium prosthesis in a 10-year-old patient and the long-term prognosis. 一名10岁患者使用特制CAD/CAM多孔钛假体重建下颌骨及远期预后。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-23 DOI: 10.1016/j.ijom.2025.07.005
Y Wang, T Wu, Z Shang, Z Shao
{"title":"Mandibular reconstruction with a custom-made CAD/CAM porous titanium prosthesis in a 10-year-old patient and the long-term prognosis.","authors":"Y Wang, T Wu, Z Shang, Z Shao","doi":"10.1016/j.ijom.2025.07.005","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.07.005","url":null,"abstract":"<p><p>Reconstruction of the mandible in growing patients following mandibulectomy is crucial for minimizing deformities and disabilities. Surgeons have been exploring various methods for mandibular reconstruction in growing patients. This case report describes the use of a custom-made CAD/CAM porous titanium prosthesis for mandibular reconstruction after the resection of ameloblastoma in a growing child, where the condylar process on the affected side was preserved. This approach avoided harvesting from a secondary donor site, such as the fibula or iliac crest. Preoperative virtual surgical planning was utilized to design the mandibular osteotomy and titanium prosthesis placement. The prosthesis featured a lightweight design with cellular lattice structures and was fabricated using 3D printing. The lesion was excised through a segmental mandibulectomy, preserving the neck and head of the condyle. Simultaneous reconstruction with the titanium prosthesis was performed. Postoperative follow-up for 45 months revealed no titanium prosthesis-related complications. The growth of the condyle on the affected side was significant, and the bilateral mandibular rami were nearly symmetrical. The patient's facial appearance was satisfactory. Oral functions, including speech and mastication, were satisfactory, and the occlusion was maintained without interference.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144710397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CAD/CAM manufactured allogeneic bone blocks for three-dimensional ridge augmentation in implant dentistry: a retrospective clinical and radiological analysis. CAD/CAM制造的异体骨块用于种植牙科的三维嵴增强:回顾性临床和放射学分析。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-22 DOI: 10.1016/j.ijom.2025.07.003
O Blume, L Gärtner, M Back, P Poxleitner, O Schubert, S Otto
{"title":"CAD/CAM manufactured allogeneic bone blocks for three-dimensional ridge augmentation in implant dentistry: a retrospective clinical and radiological analysis.","authors":"O Blume, L Gärtner, M Back, P Poxleitner, O Schubert, S Otto","doi":"10.1016/j.ijom.2025.07.003","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.07.003","url":null,"abstract":"<p><p>The edentulous alveolar ridge is a challenge for implant treatment, commonly requiring extensive reconstruction to create an adequate implant site. The aim of this study was to analyse the efficacy of customized cancellous allogeneic bone blocks (CABB) for alveolar ridge augmentation and examine staged implantation in the reconstructed bone. Three-dimensional radiographic images were analysed retrospectively to determine linear bone and volume gain at T1 (postoperative after CABB insertion) and resorption at T2 (after the CABB healing phase). A total 111 implants placed in 66 CABB were investigated retrospectively, and clinical follow-up was performed. At T1, the CABB showed a mean linear bone gain of 6.29 mm horizontally and 6.80 mm vertically, and volume gain of 457 ± 302 mm<sup>3</sup>. Although complications occurred during the healing phase, there was no total bone block loss. At T2, mean bone dimensions were 4.96 mm horizontally and 5.55 mm vertically, and the volume was 326 ± 250 mm<sup>3</sup><sub>,</sub> giving a mean volumetric stability of 71.41% ± 18.00%. Five early implant losses occurred, indicating an implant survival rate of 95.5%. The results suggest that CABB can be used successfully to achieve a reasonable increase in bone dimensions for augmentation of three-dimensional alveolar ridge defects, with a high implant survival rate. However, this procedure is technique-sensitive and strict follow-up is required to allow possible intervention.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144700773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative efficacy of patient-specific and stock implants in temporomandibular joint replacement: a systematic review and meta-analysis. 患者特异性植入物和固定植入物在颞下颌关节置换术中的比较疗效:一项系统回顾和荟萃分析。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-21 DOI: 10.1016/j.ijom.2025.06.021
E-L Nolden, B K G Carvalho, A S Wenning, S Kiss-Dala, P Hegyi, A Bródy, N K Rózsa, D Végh, L Köles, M Vaszilkó
{"title":"Comparative efficacy of patient-specific and stock implants in temporomandibular joint replacement: a systematic review and meta-analysis.","authors":"E-L Nolden, B K G Carvalho, A S Wenning, S Kiss-Dala, P Hegyi, A Bródy, N K Rózsa, D Végh, L Köles, M Vaszilkó","doi":"10.1016/j.ijom.2025.06.021","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.06.021","url":null,"abstract":"<p><p>Evidence for the superiority of patient-specific implants (PSI) over stock implants in temporomandibular joint (TMJ) replacement remains inconclusive. The objective of this study was to provide guidance for clinical decisions by evaluating whether PSI offer advantages over stock systems in rehabilitation of the TMJ. A systematic search was performed in three databases to identify studies reporting mouth opening, pain, and diet outcomes for PSI and/or stock TMJ implants. Two-arm studies were analysed separately from pooled single- and two-arm studies; studies with comparable follow-up times were compared. Forty-two observational studies involving 2221 patients were included. PSI showed a consistent trend towards greater mouth opening across most follow-up times; however, a significant difference in favour of PSI was only observed in two-arm studies at >12 months (mean difference 5.83 mm; P = 0.025). Pain outcomes were mixed: stock implants favored early pain and late diet change, while PSI favored pain relief at 6-24 months. The findings suggest PSI should be considered for movement restrictions, while stock implants may provide an alternative for pain and dietary needs. Due to the observational nature of the included studies and differences in study populations across arms, the findings should be interpreted with caution.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bony mucoperiosteal flap in bony impacted upper third molar surgery. 骨粘骨膜瓣在骨阻生上第三磨牙手术中的应用。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-19 DOI: 10.1016/j.ijom.2025.07.004
J Qian, J Liang, J Li, W Zhou, L Hu, W Qi
{"title":"Bony mucoperiosteal flap in bony impacted upper third molar surgery.","authors":"J Qian, J Liang, J Li, W Zhou, L Hu, W Qi","doi":"10.1016/j.ijom.2025.07.004","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.07.004","url":null,"abstract":"<p><p>This prospective study introduces a novel maxillary tuberosity bony mucoperiosteal flap technique with repositioning and preservation of the bony tuberosity, for the extraction of bony impacted upper third molars (BIUTMs). Twenty-eight BIUTMs in 24 patients were randomly assigned to two groups according to the strategy for extraction. In the experimental group (Exp, 16 BIUTMs), bone preservation was achieved through a bone-splitting method using piezoelectric surgery (bony mucoperiosteal flap), elevating the overlying bone and connected mucoperiosteum as a single unit. In the control group (Con, 12 BIUTMs), the BIUTMs were extracted after flap elevation and bone removal. The surgical duration, postoperative complications (swelling, trismus, and pain (visual analogue scale (VAS) score and total ibuprofen consumption over 7 days)), infection, and sinus perforation were evaluated. Patients in Exp showed a greater total ibuprofen consumption than the Con patients (P = 0.009). Despite marginally longer surgical durations in the Exp (P = 0.075), there was no difference in postoperative pain (VAS), swelling, or trismus between the groups. Intraoperative sinus perforation and postoperative infection were not observed in either group. In conclusion, this study introduces a novel surgical approach for extracting BIUTMs. Long-term follow-up is necessary to evaluate the sustained impact on bone preservation.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144677059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-dimensionally printed subperiosteal implants for maxillectomy reconstruction: report of nine cases. 三维打印骨膜下种植体用于上颌切除术重建:附9例报告。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-18 DOI: 10.1016/j.ijom.2025.07.001
G De Riu, M Y Mommaerts, D Soma, A Biglio, M Roy, S Troise, A Maniaci, J R Lechien, L A Vaira
{"title":"Three-dimensionally printed subperiosteal implants for maxillectomy reconstruction: report of nine cases.","authors":"G De Riu, M Y Mommaerts, D Soma, A Biglio, M Roy, S Troise, A Maniaci, J R Lechien, L A Vaira","doi":"10.1016/j.ijom.2025.07.001","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.07.001","url":null,"abstract":"<p><p>This study was performed to investigate the use of additively manufactured custom-made subperiosteal implants in primary maxillary reconstruction. A retrospective analysis was performed of nine patients who underwent primary reconstruction of the maxilla with these implants between May 2021 and June 2023. The study focused on evaluating the feasibility, effectiveness, and short- to medium-term outcomes, including potential complications. All patients underwent simultaneous implant placement during the same surgery for tumour resection and flap reconstruction and were then monitored for a minimum of 6 months. The first results indicate that these implants are both feasible and effective in achieving stable and functional outcomes, particularly for patients who cannot undergo traditional bone reconstruction. Complication rates were low, with only one case of flap necrosis unrelated to the implant. Additionally, the implants remained stable with no signs of infection or mobility. The main limitations of the study are the small cohort size and short follow-up period. Therefore, these findings must be considered preliminary, and further studies with larger sample sizes and longer-term follow-up are required to confirm the results.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Muscle involvement in Behçet's syndrome: a case report. behaperet综合征肌肉受累1例报告。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-16 DOI: 10.1016/j.ijom.2025.07.002
M Ma, F Fang, L Zhao, J Jin, Y Cheng
{"title":"Muscle involvement in Behçet's syndrome: a case report.","authors":"M Ma, F Fang, L Zhao, J Jin, Y Cheng","doi":"10.1016/j.ijom.2025.07.002","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.07.002","url":null,"abstract":"<p><p>Behçet's syndrome, a systemic vasculitis of unknown aetiology, is classically characterized by recurrent aphthous ulcers, genital ulcers, uveitis, and cutaneous lesions. Myositis in Behçet's syndrome is rare. A unique case of Behçet's syndrome with gastrocnemius and tongue myositis as the presenting manifestations is presented here. The patient was admitted with fever, recurrent aphthous ulcers, and swelling and pain of the tongue and legs. Phlebitis of the deep-tissue vessels was seen in the tongue biopsy. A gastrocnemius muscle biopsy showed obvious muscle fibre degeneration, accompanied by swelling of the vascular endothelial cells with abundant lymphocytic infiltration. After treatment with prednisone and thalidomide, the swelling of the tongue and legs was reduced. Therefore, in the case of recurrent oral ulcers accompanied by fever and muscle lesions, even in the absence of clinical findings such as genital ulcers or ophthalmitis, it is necessary to be alert to the possibility of Behçet's syndrome.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144661417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Robotic-controlled laser osteotome versus manually controlled osteotomy for interdental osteotomies: a cadaveric study. 机器人控制的激光截骨术与人工控制的牙间截骨术:一项尸体研究。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-14 DOI: 10.1016/j.ijom.2025.06.019
N Larsen, J Buhl, J Wolff, T K Pedersen, T Baad-Hansen, S E Nørholt
{"title":"Robotic-controlled laser osteotome versus manually controlled osteotomy for interdental osteotomies: a cadaveric study.","authors":"N Larsen, J Buhl, J Wolff, T K Pedersen, T Baad-Hansen, S E Nørholt","doi":"10.1016/j.ijom.2025.06.019","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.06.019","url":null,"abstract":"<p><p>The purpose of this study was to explore the use of a cold ablation robot-guided laser osteotome (CARLO) to improve the accuracy of interdental osteotomies in orthognathic surgery. It was hypothesized that integrating CARLO during virtual preoperative planning and execution could enhance the accuracy and reproducibility of interdental osteotomies, thereby addressing challenges associated with maxillary segmentation. Ten fresh frozen human cadaveric heads were utilized to virtually plan interdental osteotomies between the lateral incisors and canines bilaterally. After surgical planning, the osteotomy on one side (randomized) was performed by CARLO, while the osteotomy on the other side was performed by one of two experienced maxillofacial surgeons using a piezoelectric saw. No significant difference in the axial distance deviations or coronal angular deviations between the virtual surgical plan and the surgical outcome were observed between the two methods. However, CARLO demonstrated significantly superior accuracy in maintaining the planned axial angulation (P = 0.025). Nonetheless, some deviations occurred, potentially due to calibration issues, suggesting further refinement is needed to reliably influence clinical practice. Collaborative approaches integrating robotics and surgeon intervention may optimize outcomes. These findings indicate that with further advancements, robot-assisted surgery could play a key role in improving accuracy in maxillofacial surgery.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144644396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine learning approach using radiomics features to distinguish odontogenic cysts and tumours. 使用放射组学特征的机器学习方法来区分牙源性囊肿和肿瘤。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-04 DOI: 10.1016/j.ijom.2025.06.020
H Muraoka, T Kaneda, K Ito, K Otsuka, S Tokunaga
{"title":"Machine learning approach using radiomics features to distinguish odontogenic cysts and tumours.","authors":"H Muraoka, T Kaneda, K Ito, K Otsuka, S Tokunaga","doi":"10.1016/j.ijom.2025.06.020","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.06.020","url":null,"abstract":"<p><p>Although most odontogenic lesions in the jaw are benign, treatment varies widely depending on the nature of the lesion. This study was performed to assess the ability of a machine learning (ML) model using computed tomography (CT) and magnetic resonance imaging (MRI) radiomic features to classify odontogenic cysts and tumours. CT and MRI data from patients with odontogenic lesions including dentigerous cysts, odontogenic keratocysts, and ameloblastomas were analysed. Manual segmentation of the CT image and the apparent diffusion coefficient (ADC) map from diffusion-weighted MRI was performed to extract radiomic features. The extracted radiomic features were split into training (70%) and test (30%) sets. The random forest model was adjusted or optimized using 5-fold stratified cross-validation within the training set and assessed on a separate hold-out test set. Analysis of the CT-based ML model showed cross-validation accuracy of 0.59 and 0.60 for the training set and test set, respectively, with precision, recall, and F1 score all being 0.57. Analysis of the ADC-based ML model showed cross-validation accuracy of 0.90 and 0.94 for the training set and test set, respectively; the precision, recall, and F1 score were all 0.87. ML models, particularly when using MRI radiological features, can effectively classify odontogenic lesions.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Factors related to the effectiveness of decompression in unicystic ameloblastoma: a retrospective study. 影响单囊性成釉细胞瘤减压效果的因素:一项回顾性研究。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-04 DOI: 10.1016/j.ijom.2025.06.018
N Vachiradecha, S Themkumkwun, N Sirintawat, N Srimaneekarn, S Pornprasertsuk-Damrongsri, A Hayter
{"title":"Factors related to the effectiveness of decompression in unicystic ameloblastoma: a retrospective study.","authors":"N Vachiradecha, S Themkumkwun, N Sirintawat, N Srimaneekarn, S Pornprasertsuk-Damrongsri, A Hayter","doi":"10.1016/j.ijom.2025.06.018","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.06.018","url":null,"abstract":"<p><p>The aim of this study was to identify factors that predict the outcome of decompression for unicystic ameloblastoma (UA) in the mandible. This was a single-center, retrospective, cross-sectional study of 40 patients with mandibular UA who underwent decompression as the primary treatment. Pre- and post-decompression panoramic radiographs were reviewed to evaluate the lesion area and calculate the percentage reduction. Other parameters were recorded from the charts, including clinical, radiographic and histopathology reports. Decompression reduced the lesion size by a mean 41.4%. The patients were classified according to the effectiveness of decompression (effective defined as ≥30% reduction): 27 patients were included in the effective group and 13 in the ineffective group. The average rate of reduction was 0.17% per day. An absence of bone perforation (P = 0.043) and larger initial lesion size (P = 0.034) were significantly associated with effective decompression. There was a significant association between the initial size and the reduction rate (increased reduction rate for initial size ≥10 cm<sup>2</sup>; P = 0.019). A significant linear relationship between the duration of decompression and the percentage reduction was observed (P = 0.025). These results demonstrate that UA can be treated initially with decompression, followed by other definitive treatments.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In vivo wear behavior and chemical alterations in a cohort of total temporomandibular joint replacements from a single design. 单一设计的全颞下颌关节置换队列的体内磨损行为和化学变化。
International journal of oral and maxillofacial surgery Pub Date : 2025-07-04 DOI: 10.1016/j.ijom.2025.06.017
C Yuh, M Q Neto, D J Hall, K Cordero, L G Mercuri, R Pourzal
{"title":"In vivo wear behavior and chemical alterations in a cohort of total temporomandibular joint replacements from a single design.","authors":"C Yuh, M Q Neto, D J Hall, K Cordero, L G Mercuri, R Pourzal","doi":"10.1016/j.ijom.2025.06.017","DOIUrl":"https://doi.org/10.1016/j.ijom.2025.06.017","url":null,"abstract":"<p><p>Total temporomandibular joint (TMJ) replacement (TMJR) is a salvage management option for end-stage TMJ pathologies. This study assessed implant damage generated in vivo of 25 surgically-retrieved TMJR prostheses. Surface damage features on mandibular ramus condylar heads and fossae were recorded using a stereomicroscope. Laser scanning confocal microscopy was used to measure roughness parameters on the mandibular ramus condylar heads and linear wear penetration on the fossae. Polyethylene oxidation index (OI) through the fossa component thickness were assessed using infrared spectroscopy. Mild wear was observed in both the TMJR mandibular ramus condylar heads and fossae. Wear features on the fossae included polishing, protuberances characteristic of striated patterns, and fine scratches. The mean ± standard deviation maximum linear wear was 87.35 ± 110.17 µm. Wear and time in situ were linearly correlated, with an estimated wear rate of 0.71 µm/month. Samples with wear scars had higher OIs within the wear scar subsurface, with OI increasing with longer time in situ. This study is novel in reporting a wear rate in TMJR polyethylene bearings. As TMJR is increasing as a management option for end-stage TMJ pathologies, knowledge of wear mechanisms associated with implant design/material is essential to ensure implant safety and effectiveness.</p>","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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