International journal of oral and maxillofacial surgery最新文献

Software-assisted bone thickness evaluation in patients with syndromic craniosynostosis undergoing Le Fort III osteotomy: a technical note. 接受 Le Fort III 截骨术的综合颅畸形患者的软件辅助骨厚度评估：技术说明。

International journal of oral and maxillofacial surgery Pub Date : 2024-11-05 DOI: 10.1016/j.ijom.2024.10.012

V Zanchi, Y Volpe, L Genitori, G Spinelli

{"title":"Software-assisted bone thickness evaluation in patients with syndromic craniosynostosis undergoing Le Fort III osteotomy: a technical note.","authors":"V Zanchi, Y Volpe, L Genitori, G Spinelli","doi":"10.1016/j.ijom.2024.10.012","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.012","url":null,"abstract":"The aim of this study was to assess the value of the use of software for the preoperative evaluation of cranial bone thickness in syndromic patients undergoing Le Fort III osteotomy. Four patients were evaluated preoperatively to determine whether they were eligible for distraction osteogenesis. Data from the computed tomography scans was evaluated using advanced reverse engineering tools to determine the temporal bone thickness. Three patients showed adequate values for the positioning of a rigid external distractor device (average thickness values >3.5 mm), while one patient showed insufficient bone thickness (average value <2.5 mm) and therefore underwent midface advancement according to the traditional technique. Adequate midface advancement was obtained in the three patients who underwent distraction osteogenesis. No complications related to the rigid external distractor were observed. A shorter skeletal advancement was obtained in the patient who underwent Le Fort III osteotomy according to the traditional technique. A cerebrospinal fluid fistula was observed after the removal of the plates, requiring surgical repair. Software evaluation of the cranial bone thickness is a useful tool in the surgical planning of Le Fort III osteotomy in patients affected by syndromic craniosynostosis.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592045","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

Safety of vertical osteotomies in segmental Le Fort I procedures: a one-year radiological follow-up study. 节段性 Le Fort I 手术中垂直截骨的安全性：为期一年的放射学随访研究。

International journal of oral and maxillofacial surgery Pub Date : 2024-11-04 DOI: 10.1016/j.ijom.2024.10.013

N Sharba, A Buch, D-M Beek, S E Nørholt, T Xi, K Stokbro

{"title":"Safety of vertical osteotomies in segmental Le Fort I procedures: a one-year radiological follow-up study.","authors":"N Sharba, A Buch, D-M Beek, S E Nørholt, T Xi, K Stokbro","doi":"10.1016/j.ijom.2024.10.013","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.013","url":null,"abstract":"The aim of this study was to evaluate dental and periodontal injuries and radiological bone healing at vertical osteotomies in patients treated with segmental Le Fort I (LFI) osteotomy, using cone beam computed tomography (CBCT) scans. This retrospective study analyzed 105 patients who underwent segmental LFI osteotomy. Vertical osteotomies were performed between the lateral incisor and canine using a bur and osteotome. CBCT scans were taken preoperatively and at 1-week and 1-year follow-ups. Measurements at 1-week included interdental distances, root injuries, and periodontal detachment, while 1-year follow-up assessed endodontic treatment and osteotomy healing. Results showed no damage to the 420 roots at risk, though 38 roots had osteotomy extensions into the periodontal ligament. The mean preoperative minimum distance between roots was significantly different between sites with intact and detached periodontal ligaments (P < 0.001). One tooth required endodontic treatment at 1-year follow-up. Incomplete healing of vertical osteotomies was more frequent in female patients (P = 0.012). The findings suggest that segmental LFI osteotomy is safe when performed with a bur and osteotome, provided a minimum distance of 2.5 mm between roots is maintained.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142585428","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

Nomogram for predicting postoperative temporomandibular joint degeneration after mandibulectomy for oral cavity cancer: a study on patients using CT and MRI data. 预测口腔癌下颌骨切除术后颞下颌关节退化的提名图：利用 CT 和 MRI 数据对患者进行的研究。

International journal of oral and maxillofacial surgery Pub Date : 2024-11-01 DOI: 10.1016/j.ijom.2024.10.010

T-Y Tseng, A Y-H Lin, P-Y Chou, C-H Toh, Y-M Wu, C-H Yeh

{"title":"Nomogram for predicting postoperative temporomandibular joint degeneration after mandibulectomy for oral cavity cancer: a study on patients using CT and MRI data.","authors":"T-Y Tseng, A Y-H Lin, P-Y Chou, C-H Toh, Y-M Wu, C-H Yeh","doi":"10.1016/j.ijom.2024.10.010","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.010","url":null,"abstract":"The aim of this study was to develop a model for predicting the risk of postoperative temporomandibular joint osteoarthritis (TMJOA) in patients receiving a segmental or marginal mandibulectomy for oral cavity cancer . A total of 371 patients with buccal or gingival cancer who underwent mandibulectomy were included in this retrospective cohort study. Demographic data, computed tomography, and magnetic resonance images were reviewed. Univariate and multivariate Cox regression analyses were performed to develop a nomogram to predict post-mandibulectomy TMJOA. TMJOA was identified in 81 of the 371 patients at 2 years and 107 at 4 years. The predictors of post-mandibulectomy TMJOA were segmental mandibulectomy (hazard ratio (HR) 2.51, 95% confidence interval (CI) 1.64-3.83, P < 0.001), age ≥ 62.5 years (HR 2.28, 95% CI 1.53-3.40, P < 0.001), BMI < 24.1 kg/m2 (HR 2.13, 95% CI 1.45-3.13, P < 0.001), and American Joint Committee on Cancer stage IVa/IVb (HR 2.21, 95% CI 1.38-3.56, P = 0.001). The nomogram developed in this study exhibited good predictive capacity (area under the curve 0.742, 95% CI 0.679-0.804). The proposed model for predicting post-mandibulectomy TMJOA in patients with buccal or gingival cancer can identify high-risk individuals for early preventive oral rehabilitation.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565363","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

Extended temporomandibular joint prostheses: a retrospective analysis of feasibility, outcomes, and complications. 加长型颞下颌关节假体：对可行性、效果和并发症的回顾性分析。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-31 DOI: 10.1016/j.ijom.2024.10.007

G Gerbino, F Sobrero, R Poelaert, C Borbon, G Ramieri, M Mommaerts

{"title":"Extended temporomandibular joint prostheses: a retrospective analysis of feasibility, outcomes, and complications.","authors":"G Gerbino, F Sobrero, R Poelaert, C Borbon, G Ramieri, M Mommaerts","doi":"10.1016/j.ijom.2024.10.007","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.007","url":null,"abstract":"Prostheses for extended total temporomandibular joint replacement (eTJR) include modifications to the traditional alloplastic fossa-condyle joint that extend to adjacent bone defects. The aim of this retrospective study was to assess the feasibility, postoperative complications, and functional and aesthetic outcomes after eTJR. Patients aged ≥18 years undergoing eTJR between 2013 and 2022 were included. Data recorded were age, sex, comorbidities, indication for eTJR, prosthesis brand, classification, concomitant surgical procedures, postoperative complications, maximum inter-incisal opening (MIO), pain, quality of life (QoL), and aesthetic outcome. Twenty-five patients (mean age 40 years), with a total of 30 joint prostheses, were included. Over a median follow-up of 42 months, there was a significant improvement in MIO in patients with reduced mouth opening at baseline (P = 0.003), as well as in pain (P = 0.007) and QoL (P = 0.004). Both patients and surgeons judged facial appearance as improved or unchanged in 88% of cases. Postoperative complications included permanent trigeminal nerve hypoesthesia (44%), permanent facial nerve dysfunction (35%), infection (8%), salivary leak (4%), and lingual nerve impairment (4%). The findings suggest that eTJR is a safe and effective treatment for temporomandibular joint deficits extending to adjacent structures, yielding satisfactory functional and aesthetic outcomes.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565362","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

Changes in mandibular angle and intergonial width after bilateral sagittal split ramus osteotomy or bimaxillary surgery with/without counterclockwise rotation. 双侧矢状劈裂颌骨截骨术或双颌手术后下颌角和颌间宽的变化（有/无逆时针旋转）。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-26 DOI: 10.1016/j.ijom.2024.09.014

D Bi, H Gao, M Q H Al-Watary, X Sun, Q Zhao, J Li

{"title":"Changes in mandibular angle and intergonial width after bilateral sagittal split ramus osteotomy or bimaxillary surgery with/without counterclockwise rotation.","authors":"D Bi, H Gao, M Q H Al-Watary, X Sun, Q Zhao, J Li","doi":"10.1016/j.ijom.2024.09.014","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.09.014","url":null,"abstract":"The aim of this retrospective study was to evaluate the morphological changes in the mandibular angle area after orthognathic surgery with or without mandibular counterclockwise rotation in Class II deformity patients, and to investigate the associated factors. Computed tomography scans obtained preoperatively (T0), within 1 month postoperatively (T1), and 6 months postoperatively (T2) were collected from 58 patients who underwent either bilateral sagittal split ramus osteotomy (group I), bimaxillary surgery with mandibular counterclockwise rotation (group II), or bimaxillary surgery without mandibular counterclockwise rotation (group III). The intergonial width increased after surgery, by 2.78 ± 2.02 mm in group I, 2.86 ± 2.81 mm in group II, and 2.53 ± 2.42 mm in group III (all P < 0.001). The mandibular angle (MA) increased in group I (ΔMA 4.76 ± 2.79°; P < 0.001) and group III (ΔMA 3.50 ± 2.58°; P < 0.001); however no significant increase was observed in group II. The increase in intergonial width was positively correlated with the lateral displacement of the proximal segment. Counterclockwise rotation of the proximal segment resulted in an increase in MA, while counterclockwise rotation resulted in a reduction in this increasing trend. The results indicate that reducing the displacement and rotation of the proximal segments is key to minimizing changes in the mandibular angle area.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515313","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

Outcomes of implants placed in sites of previously failed implants: a systematic review and meta-analysis. 在先前失败的植入部位植入种植体的效果：系统回顾和荟萃分析。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-25 DOI: 10.1016/j.ijom.2024.10.006

B Gareb, A Vissink, H Terheyden, H J A Meijer, G M Raghoebar

{"title":"Outcomes of implants placed in sites of previously failed implants: a systematic review and meta-analysis.","authors":"B Gareb, A Vissink, H Terheyden, H J A Meijer, G M Raghoebar","doi":"10.1016/j.ijom.2024.10.006","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.006","url":null,"abstract":"The survival rate of implants placed at sites of previous failures including the best treatment strategies remain unclear. This systematic review was performed to assess implant survival and peri-implant health for such cases, including subgroup analyses of immediate versus delayed implant placement and augmentation. Four electronic databases were searched. Meta-analyses including subgroup analyses were performed (PROSPERO CRD42024548610). Out of 1798 records identified, 24 studies were included. The 1-year implant survival rate after replacement was 96.7% (95% confidence interval (CI) 92.8-99.3%), with no significant difference between immediate and delayed placement (P = 0.31) or immediate and delayed augmentation (P = 0.85). Immediate augmentation showed higher overall implant survival (97.6%, 95% CI 93.4-99.9%) compared to delayed augmentation (91.7%, 95% CI 83.4-97.5%), although not statistically significant (P = 0.26). Peri-implant health outcomes, including marginal bone loss, were similar across subgroups. Second implant replacements had lower survival rates than first replacements. Replacement of the failed implant is an appealing treatment option for failed implants, although the implant survival is lower compared to initially placed implants. Immediate implant placement can be done if sufficient bone is present. If insufficient bone remains after removal, immediate augmentation followed by delayed implant placement is recommended.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142570827","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 influencing labial bone resorption after implant insertion with simultaneous guided bone regeneration: retrospective cone beam computed tomography study. 种植体植入后唇骨吸收的影响因素与同步引导骨再生：锥形束计算机断层扫描回顾性研究。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-23 DOI: 10.1016/j.ijom.2024.10.008

Y Ouqi, J Wang, X Yang, Y Man

{"title":"Factors influencing labial bone resorption after implant insertion with simultaneous guided bone regeneration: retrospective cone beam computed tomography study.","authors":"Y Ouqi, J Wang, X Yang, Y Man","doi":"10.1016/j.ijom.2024.10.008","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.008","url":null,"abstract":"This retrospective study examined factors influencing labial bone resorption in the anterior maxilla 6 months after implant insertion with simultaneous guided bone regeneration. Involving 79 patients (118 implants), the study measured labial horizontal bone width and vertical dimensions using cone beam computed tomography scans taken immediately after surgery and at 6 months. A generalized linear mixed model analyzed potential influencing factors: age, sex, implant site, timing of placement, buccal bone width at the implant platform level post-surgery, implant connection, and bone defect morphology. Significant bone resorption was noted at 6 months. The statistical analysis revealed that buccal bone width at the implant platform, implant connection, and bone defect morphology significantly impacted labial bone resorption, while patient age, sex, timing of placement, and implant site did not. Implants with a buccal bone width ≥2 mm showed significantly less labial horizontal and vertical bone resorption (horizontal P < 0.001, vertical P = 0.001), and healing abutments reduced resorption compared to cover screws (horizontal P = 0.002, vertical P = 0.034). More significant vertical resorption occurred in non-contained bone defects after guided bone regeneration (P = 0.040).","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515316","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

Current classifications of midface resections: scoping review and proposal of a new classification. 当前的面中部切除术分类：范围审查和新分类建议。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-22 DOI: 10.1016/j.ijom.2024.10.003

M Y Mommaerts, J A Sanz, J L Cebrián-Carretero, D Dadjam

{"title":"Current classifications of midface resections: scoping review and proposal of a new classification.","authors":"M Y Mommaerts, J A Sanz, J L Cebrián-Carretero, D Dadjam","doi":"10.1016/j.ijom.2024.10.003","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.003","url":null,"abstract":"Midface resection is a surgical procedure with varying degrees of complexity, ranging from partial upper jaw removal to exposure of the dura mater after resection. Existing classifications for the resulting midfacial defects are inconsistent and have issues regarding terminology, therefore a consensus is needed. The aim of this review was to analyse the previously published classifications, identify defining parameters, determine their strengths and weaknesses, and propose a universal classification for midfacial defects with the goal of being sufficiently detailed yet easily applied in clinical practice. A scoping review was conducted according to the PRISMA guidelines using the PubMed, Embase, and Wiley Online Library electronic resources. Analysis of the various midfacial resection classifications identified in the search revealed common parameters including anatomical landmarks, the walls removed, and the presence of oroantral communication, as well as an accompanying algorithm and options for reconstruction. The articles with the most detailed descriptions were noted. A new classification is proposed that includes elements of the three most detailed existing classifications, incorporating the vertical and horizontal extents of the defect, but with more specific details concerning severity and aimed at greater practical clinical utility.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515314","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

Effect of intraoral photobiomodulation therapy on pain perception associated with local anaesthesia infiltration: a systematic review and meta-analysis of randomized controlled trials. 口腔内光生物调节疗法对局部麻醉浸润相关痛觉的影响：随机对照试验的系统回顾和荟萃分析。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-21 DOI: 10.1016/j.ijom.2024.10.005

G Ye, Y Ying, B Shen, J Liu, J Lu

{"title":"Effect of intraoral photobiomodulation therapy on pain perception associated with local anaesthesia infiltration: a systematic review and meta-analysis of randomized controlled trials.","authors":"G Ye, Y Ying, B Shen, J Liu, J Lu","doi":"10.1016/j.ijom.2024.10.005","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.10.005","url":null,"abstract":"Local anaesthetic injections, commonly used in dentistry and oral surgery, often cause discomfort. This review aimed to examine the impact of intraoral photobiomodulation therapy (PBMT) on pain associated with local anaesthesia. Up to March 2024, two independent reviewers searched four databases, ultimately screening 17 randomized controlled trials for meta-analysis using Stata 17.0. The results indicate that intraoral PBMT application significantly reduces the perception of pain associated with local anaesthetic injections (standardized mean difference (SMD) -0.89, 95% confidence interval (CI) -1.27 to -0.52; P < 0.001). This analgesic effect remained consistent irrespective of concurrent topical anaesthetics, and PBMT was efficacious in paediatric (SMD -0.53, 95% CI -0.89 to -0.17; P = 0.004) and adult (SMD -1.46, 95% CI -2.32 to -0.61; P = 0.001) populations. Subgroup analysis provided very low to low-quality evidence that using a wavelength between 900 nm and 980 nm (SMD -0.87, 95% CI -1.36 to -0.39; P < 0.001) and an irradiation time of 13-40 s (SMD -0.94, 95% CI -1.35 to -0.53; P < 0.001) are associated with significant pain reduction. The use of PBMT could aid in reducing pain perception for patients during dental injections, encouraging earlier presentation for dental consultations.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515315","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

Angled channel retractor for sagittal split ramus osteotomy. 用于矢状劈裂臼齿截骨术的斜通道牵引器。

International journal of oral and maxillofacial surgery Pub Date : 2024-10-16 DOI: 10.1016/j.ijom.2024.09.009

T Watanabe, R Uozumi, A Yamazaki, K Nakao

{"title":"Angled channel retractor for sagittal split ramus osteotomy.","authors":"T Watanabe, R Uozumi, A Yamazaki, K Nakao","doi":"10.1016/j.ijom.2024.09.009","DOIUrl":"https://doi.org/10.1016/j.ijom.2024.09.009","url":null,"abstract":"Protecting the adjacent soft tissues using a channel retractor prevents complications, such as excessive bleeding, during sagittal split ramus osteotomy. However, the saucer-shaped blade of the conventional channel retractor fits poorly into the posterior border of the mandibular ramus during medial osteotomy, which is typically performed parallel to the occlusal plane. Therefore, a novel channel retractor was developed with an adjusted blade bending angle, based on cephalometric data. The lateral cephalograms of 339 Japanese patients with jaw deformities were collected. Cephalometric landmarks were identified based on the definitions of the Downs-Northwestern analysis, and the acute angle between the occlusal and ramus planes was calculated. Based on the consistent mean and median occlusal ramus angles obtained, the blade was bent at 70° in the sagittal plane to fabricate the angled channel retractor. The engagement at the posterior border of the mandibular ramus during medial osteotomy enhances its stability. Furthermore, owing to the bending direction, the angled channel retractor used for medial osteotomy on one side can be used as a channel retractor for lateral osteotomy on the other side. The proposed angled channel retractor offers both stability and versatility for osteotomy manoeuvres.","PeriodicalId":94053,"journal":{"name":"International journal of oral and maxillofacial surgery","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142484191","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