The Angle orthodontist最新文献

Postsurgical stability in mandibular prognathism patients undergoing a surgery-first approach: influence of postoperative orthodontic approach using clear aligners vs fixed appliances. 采用手术先入路的下颌前突患者的术后稳定性：使用透明矫正器与固定矫治器的术后正畸入路的影响

IF 3.2

The Angle orthodontist Pub Date : 2025-10-03 DOI: 10.2319/022125-151.1

Kyungmin Clara Lee

{"title":"Postsurgical stability in mandibular prognathism patients undergoing a surgery-first approach: influence of postoperative orthodontic approach using clear aligners vs fixed appliances.","authors":"Kyungmin Clara Lee","doi":"10.2319/022125-151.1","DOIUrl":"https://doi.org/10.2319/022125-151.1","url":null,"abstract":"Objectives: To compare the effect of postsurgical orthodontic treatment between using clear aligners (CA) or fixed appliances (FA) on the postsurgical stability of patients with mandibular prognathism in the surgery-first approach (SFA).Materials and methods: This retrospective study included 54 patients with mandibular prognathism who underwent surgical orthodontic treatment with isolated mandibular setback surgery. The patients were divided into two groups according to the mechanics of postsurgical orthodontic treatment: the CA group included 27 patients treated with clear aligners, and the FA group included 27 patients treated with brackets during postoperative orthodontic treatment. Cone beam computed tomography scans were taken before, immediately after, and at 3, 6, and 12 months postsurgery to assess mandibular relapse. The measurements of postsurgical mandibular relapse including horizontal and vertical positions were compared according to the treatment progress and groups.Results: Total postsurgical mandibular relapse at pogonion was 3.2 mm in the CA group and 2.2 mm in the FA group. Relapse was higher at 3 months postsurgery in both groups, with an average forward movement of 1.4 mm in the CA group and 1.7 mm in the FA group. Relapse in the CA group showed no significant changes over time, indicating persistence beyond the initial period. In contrast, the FA group showed a significant reduction in relapse by 3 months. Overall, the CA group tended to have greater and more persistent relapse than the FA group.Conclusions: Careful consideration of skeletal relapse is needed in the postsurgical management of patients treated with clear aligners in SFA treatment.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145215102","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

The impact of orthodontic traction on outcomes in impacted canine management: a quantitative analysis. 正畸牵引对阻生犬治疗结果的影响：定量分析。

IF 3.2

The Angle orthodontist Pub Date : 2025-10-01 DOI: 10.2319/032125-227.1

Hilal Tarkan, Oruç Ömer Gürbüz

{"title":"The impact of orthodontic traction on outcomes in impacted canine management: a quantitative analysis.","authors":"Hilal Tarkan, Oruç Ömer Gürbüz","doi":"10.2319/032125-227.1","DOIUrl":"https://doi.org/10.2319/032125-227.1","url":null,"abstract":"Objective: To evaluate the effects of orthodontic traction of impacted maxillary canines on treatment duration, alveolar bone levels, white spot lesions (WSLs), root resorption, and the need for auxiliary appliances.Materials and methods: In this retrospective study, 116 patients were divided into two groups: 58 with unilaterally impacted maxillary canines and 58 controls without impaction. All patients received nonextraction treatment using labial fixed appliances. Pretreatment and posttreatment panoramic radiographs, intraoral photographs, and intraoral scans were analyzed. The collected data were used to compare the groups across five clinical parameters. Statistical analyses included the Mann-Whitney U-test, Wilcoxon signed-rank test, χ2 test, and Cochran's Q test, with significance set at P < .05.Results: The impaction group had significantly longer treatment duration (mean = 2.64 ± 0.99 years) than controls (mean = 1.85 ± 0.60 years). Alveolar bone loss was significantly greater in teeth adjacent to the impacted canine and between the impacted and nonimpacted sides within the impaction group (P < .05). WSL incidence was higher in the impaction group, especially in posterior teeth (P = .0034). Root resorption patterns differed by region: maxillary incisors were more affected in the impaction group, whereas mandibular posterior teeth showed more resorption in controls. The use of auxiliary appliances was significantly greater in the impaction group.Conclusions: Impacted canine treatment is associated with increased treatment time, greater alveolar bone loss, higher risk of WSLs, and distinct root resorption patterns. These findings highlight the importance of individualized treatment planning, careful biomechanical control, and preventive strategies in managing impacted canines.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145202640","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

Soft adhesives may cause more iatrogenic damage than hard adhesives during cleanup following bracket removal. 在托架移除后的清理过程中，软粘接剂可能比硬粘接剂造成更多的医源性损伤。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-29 DOI: 10.2319/032125-230.1

Thomas H Butler, Paxton A Nimrod, Daranee Tantbirojn, Ayman Al Dayeh, Wanda I Claro, Antheunis Versluis

{"title":"Soft adhesives may cause more iatrogenic damage than hard adhesives during cleanup following bracket removal.","authors":"Thomas H Butler, Paxton A Nimrod, Daranee Tantbirojn, Ayman Al Dayeh, Wanda I Claro, Antheunis Versluis","doi":"10.2319/032125-230.1","DOIUrl":"https://doi.org/10.2319/032125-230.1","url":null,"abstract":"Objectives: To determine if adhesive remnants and enamel loss after debonding and cleanup with a finishing bur were affected by hardness properties of the adhesive resins.Materials and methods: Stainless steel orthodontic brackets (American Orthodontics, Mini Master series) were bonded on facial surfaces of extracted premolars using a relatively soft bioactive resin (ACTIVA BioACTIVE-Restorative, Pulpdent) or harder traditional adhesive (Transbond XT, 3M; N = 20/group). Bracketed teeth underwent 5000 thermocycles before brackets were debonded. Debonding surfaces were examined qualitatively and categorized by three examiners. Remaining adhesive was removed with a carbide finishing bur. Teeth were scanned with an optical scanner before brackets were bonded (baseline), after debonding, and after cleanup. Surface changes (mean thickness or depth, affected surface area, and volume) were calculated quantitatively after aligning scans to the baseline. Differences between the two groups were analyzed statistically with Mann-Whitney U-test or pairwise comparison at a significance level of 0.05.Results: Qualitative examination of debonded surfaces did not show a significant difference (P = .7949) in adhesive remnants between groups, which was confirmed by quantitative evaluation (P > .05). After cleanup, enamel loss was significantly higher in the softer bioactive resin group (mean depth = 91 ± 16 µm, area = 24.48 ± 9.88 mm2) than the harder traditional adhesive (mean depth = 66 ± 9 µm, area = 6.34 ± 4.41 mm2; P < .0001).Conclusions: The likelihood of adhesive remnants after debonding a bracket bonded with the bioactive resin was similar to traditional adhesive. However, enamel loss from cleaning up with a finishing bur was higher for the softer bioactive resin.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194315","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 the predictive performance of artificial intelligence for craniofacial growth. 影响人工智能对颅面生长预测性能的因素。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-29 DOI: 10.2319/031025-197.1

Naeun Kwon, Jong-Hak Kim, Heeyeon Suh, Heesoo Oh, Shin-Jae Lee

{"title":"Factors influencing the predictive performance of artificial intelligence for craniofacial growth.","authors":"Naeun Kwon, Jong-Hak Kim, Heeyeon Suh, Heesoo Oh, Shin-Jae Lee","doi":"10.2319/031025-197.1","DOIUrl":"https://doi.org/10.2319/031025-197.1","url":null,"abstract":"Objectives: To evaluate factors influencing the prediction error of artificial intelligence (AI) that predict craniofacial growth and to identify an optimal AI training condition to improve the predictive performance of the AI model.Materials and methods: Original growth data were collected from the Mathews longitudinal serial growth study. From the original data consisting of 1257 datasets from 33 growing children of northern European descent, 60 data subsets were generated using random resampling procedures to include 12, 18, and 24 subjects, with data sizes of 100, 200, 300, 400, and 500 datasets. The resampling procedures were repeated four times. Each subset was used to train and create a total of 60 AI models. The prediction accuracy of these models was evaluated using growth prediction errors at the lower lip landmark, labrale inferius, as a benchmark indicator. The prediction errors of the 60 AI models were analyzed according to the number of subjects and data sizes.Results: Prediction error decreased as the data size increased. However, increasing the number of subjects within the growth data led to higher prediction errors. Notably, the increase in prediction error caused by adding more subjects was more substantial than the improvement achieved by increasing the data size.Conclusions: The findings suggest that developing highly accurate AI-based craniofacial growth prediction models remains a significant challenge, even with extensive datasets.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145194275","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 analysis of artificial intelligence chatbots in orthodontic emergency scenarios: ChatGPT-3.5, ChatGPT-4.0, Copilot, and Gemini. 人工智能聊天机器人ChatGPT-3.5、ChatGPT-4.0、Copilot和Gemini在正畸急救场景中的对比分析

IF 3.2

The Angle orthodontist Pub Date : 2025-09-26 DOI: 10.2319/021825-146.1

Buket Erdem, Mustafa Özcan, Çağla Şar

{"title":"Comparative analysis of artificial intelligence chatbots in orthodontic emergency scenarios: ChatGPT-3.5, ChatGPT-4.0, Copilot, and Gemini.","authors":"Buket Erdem, Mustafa Özcan, Çağla Şar","doi":"10.2319/021825-146.1","DOIUrl":"https://doi.org/10.2319/021825-146.1","url":null,"abstract":"Objectives: To evaluate and compare the accuracy of four AI chatbots, ChatGPT-3.5, ChatGPT-4.0, Copilot, and Gemini, in response to orthodontic emergency scenarios.Materials and methods: Forty frequently asked questions related to orthodontic emergencies were posed to the chatbots. These questions were categorized as fixed orthodontic treatment, clear aligner treatment, eating and oral hygiene, pain and discomfort, general concerns, retention, and sports and travel. The responses were evaluated by three orthodontic experts using a five-point Likert scale, and statistical analysis was conducted to assess variations in accuracy across chatbots.Results: Statistical analysis revealed significant differences among the chatbots. Gemini and ChatGPT-4.0 demonstrated the highest accuracy in response to orthodontic emergencies, followed by Copilot, whereas ChatGPT-3.5 had the lowest accuracy scores. Additionally, the \"Fixed Orthodontic Treatment\" category showed a statistically significant difference (P = .043), with Gemini outperforming the other chatbots in this category. However, no statistically significant differences were found in other categories.Conclusions: AI chatbots show potential in providing immediate assistance for orthodontic emergencies, but their accuracy varies across different models and question categories.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180848","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

Skeletal and nasal airflow changes in late adolescents and young adults after RPE vs MARPE: a randomized clinical trial. RPE vs MARPE后晚期青少年和年轻人骨骼和鼻腔气流变化：一项随机临床试验

IF 3.2

The Angle orthodontist Pub Date : 2025-09-26 DOI: 10.2319/121224-1020.1

Isil Aras, David Cruz Walma, Oscar Olavarria, Eman Othman, Sercan Akyalcin

{"title":"Skeletal and nasal airflow changes in late adolescents and young adults after RPE vs MARPE: a randomized clinical trial.","authors":"Isil Aras, David Cruz Walma, Oscar Olavarria, Eman Othman, Sercan Akyalcin","doi":"10.2319/121224-1020.1","DOIUrl":"https://doi.org/10.2319/121224-1020.1","url":null,"abstract":"Objectives: To compare differential changes in nasal patency and dentoskeletal morphology after rapid palatal expansion (RPE) vs hybrid miniscrew-assisted rapid maxillary expansion (MARPE).Materials and methods: Thirty patients presenting with bilateral crossbite were randomized into RPE or hybrid MARPE treatment groups. MARPE patients were treated using the two-point hyrax appliance and RPE patients were treated using the conventional hyrax appliance. Nasal patency was evaluated using rhinomanometry and dentoskeletal changes were evaluated using cone beam computed tomography images.Results: The success of suture opening was 46.6% and 60% in the RPE (mean age: 17.36 ± 1.80) and MARPE groups (mean age: 18.52 ± 1.80), respectively. The MARPE group showed significantly increased nasal airflow and decreased nasal resistance during inspiration and expiration compared to the RPE group after 4 months of treatment. The RPE group demonstrated nonsignificant changes in the same parameters after 4 months. Although significant differences between groups were observed in nasal flow during inspiration and expiration for both nostrils, intergroup differences in nasal resistance were not significant (P > .05). The MARPE group exhibited greater expansion in nasal, maxillary basal, and alveolar widths compared to the RPE group. A more pronounced decrease in buccal bone thickness was observed in the RPE group. The buccal inclination of the first premolars and molars significantly increased in both groups.Conclusions: Although similar success rates for sutural opening were observed between MARPE and RPE, MARPE facilitated more pronounced changes in nasal patency and skeletal maxillary expansion compared to conventional RPE.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180781","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

Clear aligners for Class II correction in growing patients: elastics vs mandibular advancement. 生长患者II类矫正的清晰对准器：弹性与下颌前移。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-25 DOI: 10.2319/032825-251.1

Esha Patel, Stacey Moon, Heeyeon Suh, James Chen, Sandra Khong Tai, Heesoo Oh

{"title":"Clear aligners for Class II correction in growing patients: elastics vs mandibular advancement.","authors":"Esha Patel, Stacey Moon, Heeyeon Suh, James Chen, Sandra Khong Tai, Heesoo Oh","doi":"10.2319/032825-251.1","DOIUrl":"https://doi.org/10.2319/032825-251.1","url":null,"abstract":"Objectives: To evaluate the skeletal and dental effects of Class II correction in growing patients using clear aligners, with either elastics or mandibular advancement (MA).Materials and methods: The study included 66 growing Class II patients: 45 patients treated with clear aligners (20 using Class II elastics and 25 with MA) and 21 untreated controls observed over a comparable time period. Nine cephalometric and three study cast measurements were evaluated initially (T1) and the end of treatment (T2) to assess skeletal and dental changes.Results: The control group maintained a Class II molar relationship and overjet, whereas both treatment groups corrected to Class I. In the MA group, statistically significant skeletal changes from T1 to T2 were observed, including reduction in SNA (-1.09°) and ANB (-1.69°), in addition to dentoalveolar Class II correction. The elastic group showed no statistically significant changes in SNA and ANB compared to the control group. Linear regression revealed 5.28° of lower incisor proclination with Class II elastics, whereas lower incisor inclination was maintained with MA treatment.Conclusions: Clear aligner treatment with Class II elastics and MA were effective for correcting Class II malocclusion in growing patients that would have otherwise been maintained without intervention. Although Class II correction was mainly due to dentoalveolar changes, a skeletal component was observed with MA treatment.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180786","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

Orthodontic management of a patient with an impacted maxillary canine associated with severe palatal root dilaceration of the adjacent first premolar. 上颌犬牙阻生伴相邻第一前磨牙严重腭根扩张患者的正畸治疗。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-12 DOI: 10.2319/030925-196.1

Luana Karine Amaro Silva, Roberto Prado, Teresa Miranda, Felipe de Assis Ribeiro Carvalho, Rhita Cristina Cunha Almeida

{"title":"Orthodontic management of a patient with an impacted maxillary canine associated with severe palatal root dilaceration of the adjacent first premolar.","authors":"Luana Karine Amaro Silva, Roberto Prado, Teresa Miranda, Felipe de Assis Ribeiro Carvalho, Rhita Cristina Cunha Almeida","doi":"10.2319/030925-196.1","DOIUrl":"https://doi.org/10.2319/030925-196.1","url":null,"abstract":"The incidence of maxillary canine impaction is estimated at approximately 1.7% of the population and is multifactorial in etiology. Several case reports suggest a potential relationship between canine impaction and root dilaceration of the adjacent premolar, indicating mechanical interference due to their proximity. In such cases, when avoiding tooth extractions is desired, it is crucial to consider specific clinical approaches to prevent contact with the dilacerated root during traction. This case report describes traction of an impacted maxillary canine in a female patient resulting from severe palatal root dilaceration of the adjacent first premolar. The canine was surgically exposed and traction was initiated after endodontic therapy and root sectioning of the affected premolar. After 24 months of orthodontic treatment, the results were satisfactory, with adequate gingival contour, 2 mm overjet and overbite, and a Class I relationship of canines and molars. No apparent root resorption was observed, and bone structure was preserved. A multidisciplinary approach is fundamental for the success of treatment in such cases, enabling achievement of a functionally and esthetically stable occlusion while avoiding tooth extractions.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180832","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 of treatment stability among maxillary round multi-strand wire, chairside rectangular chain and vacuum formed retainers: a randomized clinical trial. 上颌圆形多股铁丝、椅边矩形链和真空成形固位器治疗稳定性的比较：随机临床试验。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-08 DOI: 10.2319/022025-150.1

Khatib N Al-Hudaid, Kazem S Al-Nimri, Samer M Al-Qaqaa

{"title":"Comparison of treatment stability among maxillary round multi-strand wire, chairside rectangular chain and vacuum formed retainers: a randomized clinical trial.","authors":"Khatib N Al-Hudaid, Kazem S Al-Nimri, Samer M Al-Qaqaa","doi":"10.2319/022025-150.1","DOIUrl":"https://doi.org/10.2319/022025-150.1","url":null,"abstract":"Objectives: To compare the effect of three different maxillary retainers: round multi-strand stainless steel (SS), rectangular white gold-plated SS, and vacuum-formed (VF) retainers on treatment stability, retainer integrity, and gingival health over 12 months.Materials and methods: Seventy subjects who finished fixed orthodontic treatment and required orthodontic retainers in the upper arch were randomly divided into three groups. The first group (mean age: 21.0 years) received bonded three multi-strand round (0.0175-inch) SS retainer, the second group (mean age: 20.4 years) received bonded rectangular (0.038 × 0.016-inch) white gold-plated SS retainer, the third group (mean age: 20.0 years) received removable VF retainer. Bonded retainers were extended from lateral to lateral incisor while VF retainer was extended to the most distal molar. After 1 year, all subjects were recalled. The primary outcome was to assess relapse in upper labial segment alignment. The secondary outcome was to evaluate the plaque index (PI) and gingival index (GI) of the upper labial segment teeth and retainer failure rate.Results: There was no statistical difference in the average irregularity index (IRI), PI, and GI among the three groups (P = .667, P = .781, P = .487, respectively). Retainer failure rate was significantly higher in Group III (60.9%) compared to Group I (20.8%) and Group II (34.8%, P = .017).Conclusions: After 1 year, anterior tooth alignment stability and gingival health parameters were not different between bonded and VF retainers. However, the VF retainer exhibited a higher failure rate compared to bonded retainers.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180811","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

Relationship between buccal osteotomy angulation and asymmetric expansion in surgically assisted rapid palatal expansion: a finite element analysis. 口腔截骨成角与手术辅助快速腭扩张不对称扩张的关系：有限元分析。

IF 3.2

The Angle orthodontist Pub Date : 2025-09-04 DOI: 10.2319/012125-73.1

Jia-Hong Lin, Guan-Lin Wu, Chun-Kai Chiu, Steven Wang, Normand Boucher, Chun-Hsi Chung, Sylvain Chamberland, David R Musich, Anh D Le, Chenshuang Li

{"title":"Relationship between buccal osteotomy angulation and asymmetric expansion in surgically assisted rapid palatal expansion: a finite element analysis.","authors":"Jia-Hong Lin, Guan-Lin Wu, Chun-Kai Chiu, Steven Wang, Normand Boucher, Chun-Hsi Chung, Sylvain Chamberland, David R Musich, Anh D Le, Chenshuang Li","doi":"10.2319/012125-73.1","DOIUrl":"https://doi.org/10.2319/012125-73.1","url":null,"abstract":"Objectives: To investigate the effects of buccal osteotomy angulation on surgically assisted rapid palatal expansion (SARPE) patterns.Materials and methods: A finite element analysis (FEA) model of the maxilla with Haas expander was constructed from a cone beam computed tomography (CBCT) image using Mimics, Geomagic, and solidWorks software. One-mm-thick buccal osteotomies were created with different combinations of 0°, 10°, 20°, and 30° from the horizontal plane to simulate differences in bilateral osteotomy angulation. Springs were placed at the buccal osteotomy gaps to mimic the strain of the bone callus. After applying 150 Newton of expansion force at the level of the expander jackscrew in each FEA scenario, the expansion pattern of the hemimaxillae was evaluated in Ansys software.Results: Scenarios with 20° (0-20°; 10-30°) and 30° (0-30°) differences resulted in significant transverse asymmetric expansion. Among the groups with 10° difference, 0-10° resulted in relatively parallel expansion, while 10-20° and 20-30° experienced V-shaped expansion with more anterior widening.Conclusions: A larger difference between the angulations of the left and right buccal osteotomies resulted in increased asymmetry in both the transverse and vertical dimensions after expansion.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145180853","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