The Angle orthodontist最新文献_第3页

Synergistic effects of high-frequency vibration and orthodontic force on osteoclast numbers and root resorption in a rat model. 高频振动和正畸力对大鼠模型破骨细胞数量和牙根吸收的协同作用。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-30 DOI: 10.2319/010725-21.1

Luxkamon Luangthamma, Srisurang Suttapreyasri, Peungchaleoy Thammanichanon, Chidchanok Leethanakul

{"title":"Synergistic effects of high-frequency vibration and orthodontic force on osteoclast numbers and root resorption in a rat model.","authors":"Luxkamon Luangthamma, Srisurang Suttapreyasri, Peungchaleoy Thammanichanon, Chidchanok Leethanakul","doi":"10.2319/010725-21.1","DOIUrl":"https://doi.org/10.2319/010725-21.1","url":null,"abstract":"Objective: To evaluate how high-frequency vibration (125 Hz) combined with light or optimal orthodontic forces affects osteoclast numbers and root volume during tooth movement in Wistar rats.Materials and methods: Using a split-mouth design, 96 sites in male Wistar rats were randomly assigned to six groups: control, high-frequency vibration (HFV), light force (LF, 5g), light force with vibration (LF/HFV), optimal force (OF, 10g), and optimal force with vibration (OF/HFV). First maxillary molars were moved mesially using nickel-titanium (NiTi) closed coil springs. Root volume and osteoclast numbers were measured using Micro-CT and histomorphometry at Days 1, 7, 14, and 21.Results: After 21 days, osteoclast numbers increased significantly in HFV (5.25 ± 0.48, P =. 002), LF/HFV (10.00 ± 0.41, P < .0001), OF (13.75 ± 0.48, P <.0001), and OF/HFV (15.25 ± 0.85, P < .0001) groups. Root volume decreased significantly in LF/HFV (7.75 ± 0.18 mm3), OF (6.68 ± 0.24 mm3), and OF/HFV (6.28 ± 0.14 mm3) groups compared to control (all P < .0001). HFV alone increased osteoclast numbers but did not affect root volume. The OF/HFV group showed the highest osteoclast numbers and root volume reduction. Three-way analysis of variance revealed that time, vibration, and force significantly reduced root volume (P < .0001). Notably, the interaction effects on osteoclast numbers were significant in LF group (P < .0001), but not OF group (P = .338).Conclusions: Combined high-frequency vibration and orthodontic forces increased osteoclast numbers and root resorption. Light forces with high-frequency vibration promoted osteoclast formation while minimizing root resorption compared to optimal forces. Additionally, the duration of this combined treatment significantly affected the extent of root resorption.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182309","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-dimensional changes of the mandibular arch after total arch distalization in skeletal Class III malocclusion. ⅲ类骨错颌全弓远端后下颌弓的三维变化。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-28 DOI: 10.2319/010125-2.1

Youi Sreng, Ji-Hyun Lee, Tung Nguyen, Kee-Joon Lee, Kyung-Ho Kim, Chooryung J Chung

{"title":"Three-dimensional changes of the mandibular arch after total arch distalization in skeletal Class III malocclusion.","authors":"Youi Sreng, Ji-Hyun Lee, Tung Nguyen, Kee-Joon Lee, Kyung-Ho Kim, Chooryung J Chung","doi":"10.2319/010125-2.1","DOIUrl":"https://doi.org/10.2319/010125-2.1","url":null,"abstract":"Objectives: To assess three-dimensional (3D) changes in tooth position, arch dimensions, and gingival levels after mandibular total arch distalization in skeletal Class III malocclusion.Materials and methods: Skeletal Class III patients treated with mandibular total arch distalization using interradicular temporary anchorage devices were analyzed using stepwise 3D superimposition and reorientation of serial cone beam computed tomography (CBCT) and digital casts (N = 19). After mandibular regional superimposition of pre- (T0) and post-treatment (T1) CBCTs, the mandibles were segmented and merged with the corresponding digital casts, generating reoriented, superimposed T0 and T1 digital casts. Changes in individual tooth position, arch dimensions, occlusal plane, and clinical crown height (CCH) were measured.Results: Mandibular teeth exhibited posterior movement ranging from 1.74 to 2.50 mm with significant lateral movement of the premolars and increase of inter-premolar width by 2.15-2.66 mm (P < .05). Extrusive movement of the entire dentition excluding the second molar was noted (P < .05), inducing changes of the occlusal plane. The overall changes in CCH were limited to -0.23 to 0.16 mm. CCH significantly increased in the premolars and decreased in the first molar (P < .05).Conclusions: Based on a stepwise digital superimposition, mandibular total arch distalization induced complex 3D changes in the mandibular arch, including distalization, extrusion, and increase of interpremolar width. Gingival margins generally were maintained, though mild-to-moderate recession was suggested in around 20% of the premolars, which may require attention.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182400","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

Comparison between two bone anchored force systems for correction of skeletal Class II malocclusion in growing patients: a randomized controlled clinical trial, part 1: short-term skeletal changes. 两种骨锚定力系统矫正生长患者骨骼II类错的比较：一项随机对照临床试验，第1部分：短期骨骼变化

IF 3.2

The Angle orthodontist Pub Date : 2025-07-28 DOI: 10.2319/111324-934.1

Yasmine M Mahmoud, Sherief H Abdel-Haffiez, Eiman S Marzouk, Adham A El Ashwah, Hanan A Ismail

{"title":"Comparison between two bone anchored force systems for correction of skeletal Class II malocclusion in growing patients: a randomized controlled clinical trial, part 1: short-term skeletal changes.","authors":"Yasmine M Mahmoud, Sherief H Abdel-Haffiez, Eiman S Marzouk, Adham A El Ashwah, Hanan A Ismail","doi":"10.2319/111324-934.1","DOIUrl":"https://doi.org/10.2319/111324-934.1","url":null,"abstract":"Objectives: To compare the treatment effects of pushing or pulling force mechanics applied to bimaxillary miniplates with those of deferred treatment control patients to evaluate mandibular skeletal growth changes in growing patients with skeletal Class II malocclusion due to mandibular deficiency.Materials and methods: Thirty-nine patients (24 males, 15 females; mean age = 11.59 ± 0.56 years) were equally and randomly assigned to one of three groups: Group A, skeletally anchored fixed-functional appliance (pushing mechanics); Group B, skeletally anchored Class II spring (pulling mechanics); and Group C, deferred treatment skeletal Class II control patients. Pretreatment and posttreatment cone-beam computed tomography scans were used for assessment of measurements (time interval: 11.52 ± 0.32, 11.53 ± 0.31, and 9.63 ± 0.22 months for groups A, B, and C, respectively).Results: Relative to the control group, both intervention groups showed significant increases in effective mandibular length (Co-Gn), with mean differences of 5.08 ± 2.25 mm in Group A, and 3.83 ± 2.79 mm in Group B. A significant improvement in the sagittal relationship was observed in both groups, with reductions in ANB angle by 4.31° in Group A, and 5.5° in Group B. The mandibular plane angle was increased significantly in Group B by 1.83 ± 0.72°.Conclusion: Mandibular growth was enhanced using either pushing or pulling skeletally anchored force mechanics. The use of pulling force mechanics, specifically, was associated with increases in lower facial height.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182381","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 evaluation of accuracy between dynamic navigation and freehand method during orthodontic implant placement: a split-mouth study. 动态导航与徒手方法在正畸种植体植入中的准确性比较评价：一项裂口研究。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-24 DOI: 10.2319/100424-812.1

Mohammed Farheen, Manda Anoosha, Mantena Satyanarayana Raju, C V Padmapriya, Datla Praveen Kumar Varma, Velagala Sai Keerthi

{"title":"Comparative evaluation of accuracy between dynamic navigation and freehand method during orthodontic implant placement: a split-mouth study.","authors":"Mohammed Farheen, Manda Anoosha, Mantena Satyanarayana Raju, C V Padmapriya, Datla Praveen Kumar Varma, Velagala Sai Keerthi","doi":"10.2319/100424-812.1","DOIUrl":"https://doi.org/10.2319/100424-812.1","url":null,"abstract":"Objectives: To assess and compare the accuracy of infrazygomatic crest screws (IZC) placed with and without a dynamic navigation system.Materials and methods: Preoperative cone-beam computed tomography (CBCT) and intraoral scan of the maxillary arch were obtained for 12 patients requiring therapeutic first premolar extraction after leveling and alignment. Virtual planning of the final IZC screw position on both sides was done using Evalunav software. Maxillary left and right arches for each patient were randomized into experimental and control sides. A 12 × 2 mm dimension IZC screw was positioned with and without use of a dynamic navigation system randomly on either side. A postoperative CBCT was taken immediately to assess the final screw position. Preoperative and postoperative CBCTs were compared for deviation in the entry point, apical point, and angular point for experimental and control sides. Mean value deviations obtained were subjected to statistical analysis using SPSS 20.0 to describe the data.Results: Paired t-tests were used to analyze the comparisons. Dynamic navigation showed a statistically significant difference in entry point and angular point compared to the freehand approach during implant placement.Conclusions: IZC screws implanted with the dynamic navigation system offered better control with less deviation and greater accuracy in all three planes of space. However, further studies are necessary to determine the stability and anchor value of implants placed with a dynamic navigation system.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182375","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

Nonsurgical treatment of severe vertical maxillary excess with short roots, thin bone, and a low maxillary sinus floor. 非手术治疗上颌根短、骨薄、上颌窦底低的严重上颌垂直赘肉。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-18 DOI: 10.2319/112224-958.1

Bin Li, Fei Huang, Peiqi Wang, Chaoran Xue, Xianglong Han, Ding Bai, Hui Xu

{"title":"Nonsurgical treatment of severe vertical maxillary excess with short roots, thin bone, and a low maxillary sinus floor.","authors":"Bin Li, Fei Huang, Peiqi Wang, Chaoran Xue, Xianglong Han, Ding Bai, Hui Xu","doi":"10.2319/112224-958.1","DOIUrl":"https://doi.org/10.2319/112224-958.1","url":null,"abstract":"Severe vertical maxillary excess (VME) is a skeletal abnormality that typically requires orthognathic surgery for correction. Nonsurgical orthodontic treatment has been a fascinating but challenging alternative, especially when adverse anatomic factors hamper or pose risks for intrusive tooth movement. Despite well-documented efficiency of temporary anchorage device (TAD)-aided nonsurgical treatment for VME, evidence is scarce regarding the treatment efficacy and safety for cases with adverse anatomic traits. In this case report, we present nonsurgical treatment of a patient with severe VME, maxillary protrusion, and retrognathism. Additional challenges included compromised periodontal health, low maxillary sinus floor, short roots with axes deviating from the center of basal bone, and thin labial cortical bone with partial deficiencies. With anchorage from a transpalatal arch (TPA) and TADs and elaborate biomechanical control strategies, significant maxillary full-arch intrusion and anterior retraction with adequate root torque control were achieved, resulting in counterclockwise mandibular rotation and notable profile improvement. One-year follow-up showed stable treatment results. This case provided evidence on how balance may be achieved between treatment efficacy and anatomical limitations using biomechanical control strategies.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182483","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

Bullying in schoolchildren and its relationship to malocclusion accounting for demographic and psychosocial factors: a cross-sectional study of 10- to 14-year-olds in the United Kingdom. 学童恃强凌弱及其与人口统计学和社会心理因素错牙合的关系：一项针对英国10至14岁儿童的横断面研究。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-15 DOI: 10.2319/122724-1064.1

Andrew DiBiase, Zaffie Cox, Michaela Rea, James Cane, Lindsey Cameron, Adam Rutland

{"title":"Bullying in schoolchildren and its relationship to malocclusion accounting for demographic and psychosocial factors: a cross-sectional study of 10- to 14-year-olds in the United Kingdom.","authors":"Andrew DiBiase, Zaffie Cox, Michaela Rea, James Cane, Lindsey Cameron, Adam Rutland","doi":"10.2319/122724-1064.1","DOIUrl":"https://doi.org/10.2319/122724-1064.1","url":null,"abstract":"Objectives: To investigate the prevalence of bullying in schoolchildren and its relationship with malocclusion, accounting for demographic and psychosocial factors.Materials and methods: This was a cross-sectional study on 10-14-year-old schoolchildren in the United Kingdom. Clinical examination was undertaken measuring Index of Orthodontic Treatment Need (IOTN), overjet, overbite, and crowding or spacing. Questionnaires were used to measure bullying, oral health-related quality of life (OHRQoL), self-esteem (SE), loneliness, and behavioral and emotional difficulties.Results: Of 698 participants, 68 reported being bullied (9.7%). No difference was found in prevalence for gender, ethnicity, or age. Increased prevalence was found in participants with overjet > 6 mm (P = .02) and great need for treatment (IOTN Dental Health Component 5 P < .001, Aesthetic Component 9-10 P = .008). Bullied participants reported lower OHRQoL (P < .001) and SE (P < .001) and higher levels of loneliness (P < .001), emotional symptoms (P < .001), conduct problems (P = .002), and peer problems (P < .001). Multivariate analysis showed that being bullied was related to higher levels of loneliness (P = .007), poor peer relations (P < .001), and increased overjet (P = .032).Conclusions: Accounting for psychosocial factors, risk of being a victim of bullying was related to malocclusion, specifically an increased overjet.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182361","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

Accuracy of a dynamic guided surgery system for orthodontic miniscrew placement: an experimental in vitro study. 一个动态引导手术系统的准确性正畸微型支架安置：一项实验性体外研究。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-14 DOI: 10.2319/021425-137.1

Tania Moya-Martínez, Rui Figueiredo, Adrià Jorba-García, Jose Javier Bara-Casaus, Fernando Rojas-Vizcaya, Cristina de-la-Rosa-Gay, Alba Sánchez-Torres, Eduard Valmaseda-Castellón

{"title":"Accuracy of a dynamic guided surgery system for orthodontic miniscrew placement: an experimental in vitro study.","authors":"Tania Moya-Martínez, Rui Figueiredo, Adrià Jorba-García, Jose Javier Bara-Casaus, Fernando Rojas-Vizcaya, Cristina de-la-Rosa-Gay, Alba Sánchez-Torres, Eduard Valmaseda-Castellón","doi":"10.2319/021425-137.1","DOIUrl":"https://doi.org/10.2319/021425-137.1","url":null,"abstract":"Objectives: To compare the accuracy and time required for orthodontic miniscrew placement using a dynamic computer-assisted surgery (d-CAS) system vs the conventional freehand (FH) approach. The effect of side, location, and operator experience was also evaluated.Materials and methods: A randomized, in vitro experimental study was conducted using 10 maxillary resin models. After virtual planning, 40 miniscrews were randomly placed by one experienced and one novice operator. Twenty miniscrews were placed using a d-CAS system (test group) and 20 using the conventional FH method (control group). Preoperative and postoperative cone beam computed tomography scans were superimposed to measure deviations between the planned and final miniscrew position, and placement time was recorded.Results: The d-CAS group showed less deviation at the entry point (95% confidence interval [CI] = 1.79 mm to 0.16 mm; P = .019) and less angle deviation (95% CI = 8.5° to 1.7°; P = .004). No significant differences were observed in other variables. Both operators achieved similar accuracy. Placement time was significantly longer in the d-CAS group, with a mean difference of 6.3 minutes (P < .001).Conclusions: Dynamic computer-assisted surgery improves the accuracy of orthodontic miniscrew placement vs the traditional FH method. However, d-CAS takes significantly longer. Clinician experience does not seem to significantly affect accuracy.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182398","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

External apical root resorption assessment revisited: a scoping review. 重新评估外根尖吸收：范围审查。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-11 DOI: 10.2319/091024-744.1

Paula Iber-Diaz, Raquel Senen-Carramolino, Andrea Otero-Pregigueiro, Juan Carlos Palma-Fernandez, Alejandro Iglesias-Linares

{"title":"External apical root resorption assessment revisited: a scoping review.","authors":"Paula Iber-Diaz, Raquel Senen-Carramolino, Andrea Otero-Pregigueiro, Juan Carlos Palma-Fernandez, Alejandro Iglesias-Linares","doi":"10.2319/091024-744.1","DOIUrl":"https://doi.org/10.2319/091024-744.1","url":null,"abstract":"Objectives: To provide a comprehensive critique of the diagnosis of root resorption using panoramic and periapical radiography, including discussion of the various methods of measurement, severity spectrum, and to shed light on a significant factor predisposing to resorption: treatment duration.Materials and methods: The articles reviewed involved human subjects undergoing buccal fixed orthodontic treatment, diagnosed by panoramic or intraoral radiographs at the beginning and end of treatment. Treatment duration and external apical root resorption (EARR) had to be recorded to be included in the study. Relevant sources were searched using various platforms including PubMed, Scopus, and WoS. All sources of evidence, regardless of language, were included in the study.Results: The search strategy yielded 704 studies; screening by title and abstract yielded 389 articles for full-text review. Forty studies were finally included and categorized according to the type of radiograph used to diagnose EARR: authors of 18 studies used panoramic radiographs, and authors of 22 studies used intraoral radiographs.Conclusions: In this study, we revealed a lack of agreement among authors concerning the diagnosis and measurement methods of external apical root resorption, resulting in inconsistencies in the results. Additionally, patient- and treatment-related factors, including treatment duration, were found to be inconsistently associated with the development of EARR. Standardization of diagnostic protocols and refinement of measurement techniques are essential to improve the accuracy of orthodontic care.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182469","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

Recovery bone formation over radiographic lingual bone dehiscence after mandibular molar distalization with microimplants. 下颌磨牙微种植体远端化后舌骨裂的影像学恢复骨形成。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-10 DOI: 10.2319/011625-58.1

Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park

{"title":"Recovery bone formation over radiographic lingual bone dehiscence after mandibular molar distalization with microimplants.","authors":"Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park","doi":"10.2319/011625-58.1","DOIUrl":"https://doi.org/10.2319/011625-58.1","url":null,"abstract":"Objectives: To assess mandibular lingual bone thickness changes after molar distalization with microimplants and during retention.Materials and methods: Twenty-one patients (10 men, 11 women; mean age: 20.5 ± 4.9 years) who underwent mandibular molar distalization with microimplants were included. Cone-beam computed tomography images at pretreatment (T0), posttreatment (T1), and retention (T2) were used to measure posterior space available and lingual bone thickness distal to the mandibular second molar at 0-, 2-, 4-, and 6-mm levels apical to the root furcation. Repeated measures analysis of variance with Bonferroni correction was applied to compare T0, T1, and T2 measurements. Pearson's correlation analysis assessed the relationship between lingual bone thickness change and other variables.Results: The mandibular second molar moved distally by 3.0 mm at crown level, and 1.2-1.8 mm at root level, after treatment. Posterior space available decreased significantly with root-cortex contact or radiographic lingual bone dehiscence observed at 6-mm root level. After retention, reduced cortical bone thickness increased significantly; however, T2 lingual bone thickness was less than T0. Although the decrease in lingual bone thickness at 6-mm root level correlated with crown and root distal movement after treatment, the increase in bone thickness during retention was not associated with tooth movement, patient age, or retention duration.Conclusions: Mandibular lingual bone thickness noticeably decreased after molar distalization with microimplants. After retention, significant bone recovery formation was observed at the thinned lingual cortex or radiographic bone dehiscence.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182498","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

Transverse decompensation in surgery-first approach vs conventional orthognathic surgery in mandibular prognathism patients. 手术先入路与传统正颌手术治疗下颌前突患者的横向失代偿。

IF 3.2

The Angle orthodontist Pub Date : 2025-07-03 DOI: 10.2319/120724-1003.1

KyungMin Clara Lee, Huiming Xu, Hyun-Ju Jeon

{"title":"Transverse decompensation in surgery-first approach vs conventional orthognathic surgery in mandibular prognathism patients.","authors":"KyungMin Clara Lee, Huiming Xu, Hyun-Ju Jeon","doi":"10.2319/120724-1003.1","DOIUrl":"https://doi.org/10.2319/120724-1003.1","url":null,"abstract":"Objectives: To investigate transverse treatment outcomes in patients with skeletal Class III malocclusion treated with a surgery-first orthognathic approach (SFA) vs conventional orthognathic surgery (COS).Materials and methods: This retrospective cohort study included 128 patients, divided into four groups of 32 based on the inclusion of presurgical treatment and extraction of the maxillary premolars: (1) COS with extraction, (2) COS without extraction, (3) SFA with extraction, and (4) SFA without extraction. CBCT scans were taken before and after treatment, with an additional scan after presurgical orthodontic treatment for the COS group only. The primary outcome variable was transverse decompensation, assessed through changes in maxillary and mandibular molar inclination and intermolar width. Predictor variables included treatment approach (SFA vs COS) and extraction status (extraction vs nonextraction). Transverse measurements were compared among the four groups throughout the treatment process.Results: Maxillary molar inclination relative to the occlusal plane increased after treatment, whereas the mandibular molar inclination decreased after treatment, indicating transverse decompensation in the COS and SFA groups, and the extraction and nonextraction groups. There were no statistically significant differences in transverse changes between the COS and SFA groups.Conclusions: Although the difference in transverse decompensation between the COS and SFA groups was not statistically significant, clinicians may still need to consider careful management of transverse decompensation during postsurgical treatment, particularly in SFA cases.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182395","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