The Angle orthodontist最新文献_第6页

Eruptive path of maxillary canines in patients with lateral incisor agenesis: a longitudinal follow-up. 侧切牙缺失患者的上颌犬齿萌出路径：纵向随访。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/031324-211.1

João Gabriel Rando Poiani, Gabriela Utrago, Felícia Miranda, Vinícius Augustus Merino da Silva, Ana Cláudia de Castro Ferreira Conti, Daniela Garib

{"title":"Eruptive path of maxillary canines in patients with lateral incisor agenesis: a longitudinal follow-up.","authors":"João Gabriel Rando Poiani, Gabriela Utrago, Felícia Miranda, Vinícius Augustus Merino da Silva, Ana Cláudia de Castro Ferreira Conti, Daniela Garib","doi":"10.2319/031324-211.1","DOIUrl":"10.2319/031324-211.1","url":null,"abstract":"Objectives: To evaluate the eruptive angle, mesiodistal position and height of permanent maxillary canines in patients with agenesis of the permanent maxillary lateral incisor (AL) from the mixed to the permanent dentition.Materials and methods: The sample was composed of orthodontic records of subjects with and without AL. The agenesis group comprised 11 patients, 7 with bilateral and 4 with unilateral AL (8.6 ± 1.6 years, 4 males, 7 females). The control group comprised 9 patients (8.5 ± 1.0 years, 2 males, 7 females) without AL. Panoramic radiographs were analyzed at three timepoints: inter-transitional period (T1), second transitional period (10.1±0.9 years, T2) and permanent dentition (11.9±1.1 years, T3). The long axis angle of the permanent maxillary canine (α and β), the mesiodistal distance (d) in relation to the central incisor, and the height (H) from the cusp tip of the canine to the occlusal plane were evaluated. Intergroup comparisons were performed with t-tests, Mann-Whitney, and Chi-square tests (P < 0.05).Results: A mesial position of the canine cusp tip relative to the distal of the permanent maxillary central incisor was observed for the agenesis group at T1, T2 and T3. From T1 to T2, the agenesis group showed greater occlusal displacement of the canine tooth germ.Conclusions: In patients with AL, canine tooth germs showed more mesial displacement and erupted a mean of 4.5 mm closer to the maxillary central incisors. Eruption of maxillary canines tended to be accelerated during the late mixed dentition in patients with AL.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662354/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diagnostic performance of ClinCheck, Dolphin Imaging, and 3D Slicer software for Bolton discrepancy analysis. 用于博尔顿差异分析的 ClinCheck、Dolphin Imaging 和 3D Slicer 软件的诊断性能。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/022724-156.1

Thalita Teixeira Santana, Flávio Copello, Guido Artemio Marañón-Vásquez, Lincoln Issamu Nojima, Eduardo Franzotti Sant'Anna

{"title":"Diagnostic performance of ClinCheck, Dolphin Imaging, and 3D Slicer software for Bolton discrepancy analysis.","authors":"Thalita Teixeira Santana, Flávio Copello, Guido Artemio Marañón-Vásquez, Lincoln Issamu Nojima, Eduardo Franzotti Sant'Anna","doi":"10.2319/022724-156.1","DOIUrl":"10.2319/022724-156.1","url":null,"abstract":"Objectives: To evaluate the diagnostic performance of ClinCheck, Dolphin Imaging orthodontic software, and 3D Slicer for the analysis of Bolton discrepancy (BD).Materials and methods: Fifty-five pairs of early-stage digital models of patients treated with Invisalign were printed to measure the BD by manual method with a digital caliper (gold standard). The discrepancy values calculated by ClinCheck were obtained. In addition, the sample STL files were measured using Dolphin Imaging and 3D Slicer software to obtain BD values. To assess reliability, precision, and accuracy of the methods, intraclass correlation coefficients (ICCs), Dahlberg's formula, paired t-tests, and the Bland-Altman method were used, respectively. Repeated-measures analysis of variance with Bonferroni post hoc test was used to assess the difference between groups.Results: The three methods showed reliable measurements (ICC ≥ 0.7), with the values of anterior Bolton slightly higher than overall Bolton. Measurements for the anterior Bolton showed higher precision (Dahlberg's formula 0.65, 0.70, and 0.55) than those for the overall Bolton. For anterior Bolton, only the measurements obtained by ClinCheck and Dolphin Imaging were accurate (P > .05, no proportion bias), while for overall Bolton, all groups had a significant difference. The Bland-Altman plots demonstrated no consistency for anterior Bolton measurements when 3D Slicer was used and for the overall Bolton.Conclusions: ClinCheck and Dolphin Imaging showed accuracy to quantify anterior BD. For the overall Bolton measurements, ClinCheck showed a statistical difference from the manual assessment but without relevant clinical significance.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"51-56"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662356/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In vitro measurement of the initial forces and moments generated for a curve of Spee malocclusion with labial and lingual archwire forms. Spee型唇、舌弓形错牙合曲线初始力和力矩的体外测量。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/050224-349.1

Silas Yeung, Brandon Owen, Giseon Heo, Jason P Carey, Paul W Major, Dan L Romanyk

{"title":"In vitro measurement of the initial forces and moments generated for a curve of Spee malocclusion with labial and lingual archwire forms.","authors":"Silas Yeung, Brandon Owen, Giseon Heo, Jason P Carey, Paul W Major, Dan L Romanyk","doi":"10.2319/050224-349.1","DOIUrl":"10.2319/050224-349.1","url":null,"abstract":"Objectives: To compare the biomechanics of labial and lingual fixed orthodontic treatment options for a simulated curve of Spee malocclusion.Materials and methods: An in vitro electromechanical orthodontic simulator was used to measure the three-dimensional forces and moments on each tooth of a mandibular arch. Labial and lingual brackets, both with 0.018-inch slot sizes, were bonded to mechanical teeth. Three archwire forms were considered: labial straight, lingual straight, and lingual mushroom. The simulator was set in a passive levelled position with 0.016-inch × 0.022-inch stainless steel archwires, then teeth were moved to a curve of Spee maloclussion with the first premolar intruded 1.5 mm and the canine and second premolar intruded 0.75 mm. Two-way mixed multivariate analysis of variance (α = 0.05) was used to compare forces and moments generated among the three archwires.Results: Statistical differences were found in 55 of 63 comparisons of forces and moments between archwire types for each tooth around the arch. The lowest force magnitudes were measured for labial straight archwires at each tooth position. The lateral incisor experienced the largest gingival forces with all archwire forms. The first premolar and first molar experienced labial-lingual crown tipping moments in opposite directions between labial and the two lingual archwire forms.Conclusions: Biomechanical differences between labial, lingual straight, and lingual mushroom treatment modalities for the correction of curve of Spee misalignments were elucidated. Labial straight archwire exerted the lowest force magnitudes overall. For both lingual archwire forms, the labial-lingual inclination of the first premolar could be highly variable during levelling.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"95 1","pages":"35-42"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662361/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Which orthodontic articles are accessed online the most? Exploring article usage metrics along with citations and altmetrics. 哪些正畸文章在网上访问量最大？探索文章的使用指标以及引用和 Altmetrics。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/060124-426.1

Christos Livas, Konstantina Delli

{"title":"Which orthodontic articles are accessed online the most? Exploring article usage metrics along with citations and altmetrics.","authors":"Christos Livas, Konstantina Delli","doi":"10.2319/060124-426.1","DOIUrl":"10.2319/060124-426.1","url":null,"abstract":"Objectives: To investigate the current state of article usage metrics in orthodontics.Materials and methods: Out of all orthodontic journals listed in Journal Citation Reports 2022, the European Journal of Orthodontics and The Angle Orthodontist fulfilled the inclusion criteria. All journal issues published in 2021 were scrutinized for original research articles and systematic reviews/meta-analyses, and the following features were collected: article type, subject, title, number of words and authors, Altmetric Attention Score (AAS), X (formerly Twitter) posts, and Mendeley reads. Article citations, number of publications, and h-index of the last authors were retrieved from Web of Science (WoS).Results: 181 articles were considered eligible. The median number of views and downloads of included articles was 1296 (range: 355-10,233) and 793 (range: 167-3629). Page views, downloads, and total views were significantly correlated with WoS citations (rho > 0.345; P < .001). There was no correlation between usage metrics, AAS, X posts, and Mendeley reads. Number of downloads were significantly higher in studies dealing with new technologies, and where the last author had 1-40 publications or an h-index of 0-30.Conclusions: Page views, downloads, and total views were positively correlated with WoS citations and, therefore, may serve as an early estimate of future citations. Significant variations in article downloads may be expected in relation to article subject, scientific productivity, and impact of the last authors.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"96-103"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662363/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional assessment of the nasopharyngeal airway in Down syndrome during the mixed dentition period: a case-control study. 混合牙期唐氏综合征鼻咽气道的三维评估：病例对照研究。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/022424-142.1

Hideomi Takizawa, Masahiro Takahashi, Hiroshi Yoshida, Tetsutaro Yamaguchi, Koutaro Maki

{"title":"Three-dimensional assessment of the nasopharyngeal airway in Down syndrome during the mixed dentition period: a case-control study.","authors":"Hideomi Takizawa, Masahiro Takahashi, Hiroshi Yoshida, Tetsutaro Yamaguchi, Koutaro Maki","doi":"10.2319/022424-142.1","DOIUrl":"10.2319/022424-142.1","url":null,"abstract":"Objective: In this retrospective case-control study, we aimed to evaluate the nasopharyngeal airway volume of children with Down syndrome (DS) and compare the results with those of control participants well matched for sex and age.Materials and methods: Fifteen children with DS (mean age = 9.43 ± 0.38 years; 8 boys, 7 girls) and 15 control participants (mean age = 9.51 ± 0.40 years; 8 boys, 7 girls) were enrolled. The nasopharyngeal airway volume and the cross-sectional morphology were measured with cone-beam computed tomography taken for orthodontic treatment. All measurements were assessed by analysis of covariance (ANCOVA) using Bonferroni post hoc pairwise comparison tests. Covariates were body height and body weight, and the ANB angle and the mandibular plane angle. Significance was set at P < .0019.Results: Nasal airway, superior airway, and total airway volumes of DS participants were significantly smaller than those of the control participants in ANCOVA results adjusted for ANB angle and mandibular plane angle (P = .000). In ANCOVA results adjusted for body height and body weight, no statistically significant differences in the volume measurements were found.Conclusion: The results indicate that the nasopharyngeal airway volume differs between children with and without DS and that the airway volume tends to be smaller in DS children than in children without DS.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"78-85"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662362/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142121480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harmonizing soft tissue subnasale and chin position in a forehead-based framework: interracial commonalities and differences between Asian and Caucasian females. 在基于前额的框架中协调鼻下软组织和下巴位置：亚裔女性和高加索女性的种族间共性和差异。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/022524-145.1

Tian Chen, Xianrui Yang, Chaoran Xue, Ding Bai, Hui Xu

{"title":"Harmonizing soft tissue subnasale and chin position in a forehead-based framework: interracial commonalities and differences between Asian and Caucasian females.","authors":"Tian Chen, Xianrui Yang, Chaoran Xue, Ding Bai, Hui Xu","doi":"10.2319/022524-145.1","DOIUrl":"10.2319/022524-145.1","url":null,"abstract":"Objectives: To establish a reference system for assessing the anteroposterior (A-P) position of the subnasal and lower-facial soft tissues for whole facial harmony.Materials and methods: Forty Asian and 40 Caucasian females with attractive profiles were selected as the \"attractive\" samples, with \"ordinary\" samples for comparison. Each profile was analyzed, and comparisons were made to reveal the interracial commonalities and differences. Esthetically essential parameters were established. An averaged attractive profile for each race was created by digital morphing and then modified into 30 variations based on combined variations of the esthetically essential parameters. Assessments were performed to investigate the esthetic ranges.Results: A-P position of the subnasal and lower-facial landmarks harmonized with the forehead for female profile esthetics. In addition to balanced soft tissue subnasale (sSn)- and soft titssue pogonion (Pos)-to-forehead A-P relations, harmonizing lower-facial soft tissues to sSn was indispensable for profile attractiveness. sSn-to-glabella, Pos-to-glabella, and Pos-to-sSn A-P relations were esthetically essential. Perceived by orthodontists, the attractive Asian female profiles had sSn-to-glabella A-P relations ranging from 0.5 mm to 4.5 mm, Pos-to-sSn from -9.0 mm to -5.5 mm, and Pos-to-glabella from -8.5 mm to -1.0 mm. Compared with Asians, the attractive Caucasian female profiles had more anteriorly and widely distributed sSn relative to the forehead, wider ranges of Pos-to-sSn A-P relations, and more prominent chins.Conclusions: A reference system comprising sSn-glabella, Pos-sSn, and Pos-glabella horizontal distances was constructed for facial profile analysis. This system could aid treatment planning for surgical or orthopedic repositioning of the maxilla and chin.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"86-95"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662358/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reliability assessment of craniofacial and airway measurements: a comparative study between multidetector computed tomography and cone-beam computed tomography. 颅面和气道测量的可靠性评估：多载体计算机断层扫描与锥束计算机断层扫描的比较研究。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/022124-131.1

Jui-Sheng Sun, Min-Chih Hung, Chi-Yeh Hsieh, Shih-Ying Lin, Han-Cheng Tai, Jenny Zwei-Chieng Chang

{"title":"Reliability assessment of craniofacial and airway measurements: a comparative study between multidetector computed tomography and cone-beam computed tomography.","authors":"Jui-Sheng Sun, Min-Chih Hung, Chi-Yeh Hsieh, Shih-Ying Lin, Han-Cheng Tai, Jenny Zwei-Chieng Chang","doi":"10.2319/022124-131.1","DOIUrl":"10.2319/022124-131.1","url":null,"abstract":"Objectives: To compare the intra- and inter-examiner reliability of multidetector computed tomography (MDCT) and cone-beam computed tomography (CBCT) using Amira and Dolphin software analyses for craniofacial/airway measurements by six examiners.Materials and methods: Five adults and one dry skull with CBCT and MDCT scan files were duplicated and randomly numbered. Six orthodontic residents imported these files into two software programs, oriented the images, set thresholds, and performed 26 measurements. Intra- and inter-examiner reliabilities were determined by using intraclass correlation coefficient (ICC) and presented with scatterplots.Results: Variables including anterior nasal width, posterior nasal width, frontomaxillary suture right-to-left, inner nasal contour point right-to-left, and minimum cross-sectional area in the oropharynx showed \"moderate\" to \"substantial\" intra- or inter-examiner agreement. Amira provided relatively reliable airway assessment, while Dolphin showed standard deviations 10 to 30 times larger for volumetric airway measurements. MDCT scans significantly reduced airway volume/area measurements compared to CBCT, except for intraoral airway volume.Conclusions: Unreliable skeletal measurements and low reliability of Dolphin for airway analysis discourage using CT to quantitatively correlate changes in craniofacial structures with airway dimensions.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"57-77"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662359/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An in vitro study of a combined patient-specific device for safe and accurate insertion of infrazygomatic crest miniscrews. 用于安全、准确插入颧骨下微型螺钉的患者专用组合装置的体外研究。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/022624-147.1

Bingran Du, Xiaoyi Wang, Jun Wang, Mohan Ji, Qin Yi, Jiang Jiang, Jinchuan Tan, Jianyi Li

{"title":"An in vitro study of a combined patient-specific device for safe and accurate insertion of infrazygomatic crest miniscrews.","authors":"Bingran Du, Xiaoyi Wang, Jun Wang, Mohan Ji, Qin Yi, Jiang Jiang, Jinchuan Tan, Jianyi Li","doi":"10.2319/022624-147.1","DOIUrl":"10.2319/022624-147.1","url":null,"abstract":"Objectives: To develop and assess the efficacy of a novel combined patient-specific device (CPSD) for the accurate and safe insertion of infrazygomatic crest miniscrews in orthodontic procedures.Materials and methods: Twenty-eight miniscrews were placed in the infrazygomatic crest region of 28 cadaver maxillae using the direct manual method (n = 14) or the CPSD (n = 14) based on preset trajectories. The CPSD, designed based on the integration model, included a positioning guide, an insertion guide, and a depth-limiting groove. Deviations in the insertion site, tip location, insertion angle, and biting depth between the preset and real insertion trajectories were calculated to evaluate the accuracy of miniscrew insertion. Classification frequencies of root proximity, sinus penetration depth, and biting depth of the miniscrew after insertion were also calculated to evaluate the safety of miniscrew insertion.Results: Regarding evaluation of accuracy, significant differences were observed in the deviation values of the insertion site, tip location, insertion angle, and biting depth between the CPSD and freehand groups (P = .001, P < .001, P < .001, P = .039, respectively). Regarding evaluation of safety, a significant difference was observed in the classification frequencies of root proximity between the two groups (P = .016).Conclusions: Compared with manual insertion, CPSD could be a preferred method for safe and accurate insertion of infrazygomatic crest miniscrews for orthodontists.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"43-50"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662357/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison between effects of reverse curve of Spee nickel titanium archwire and stainless steel archwires with and without torque on the lower incisors in deep overbite treatment: a randomized control study. 在深咬合治疗中，斯佩镍钛弓丝反向曲线和不锈钢弓丝带扭矩与不带扭矩对下切牙影响的比较：随机对照研究。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/051524-376.1

Farah Shakhtour, Kazem Al-Nimri

{"title":"Comparison between effects of reverse curve of Spee nickel titanium archwire and stainless steel archwires with and without torque on the lower incisors in deep overbite treatment: a randomized control study.","authors":"Farah Shakhtour, Kazem Al-Nimri","doi":"10.2319/051524-376.1","DOIUrl":"10.2319/051524-376.1","url":null,"abstract":"Objectives: To compare the effect between three different reverse curve of Spee (RCOS) archwires: 0.016 × 0.022-inch Nickel-Titanium and 0.019 × 0.025-inch stainless steel (SS) with and without crown labial torque (CLT) on lower incisors during deep overbite treatment.Materials and methods: Eighty subjects with deep overbite were randomly divided into three groups: the first group (mean age: 20.5 years) received SS RCOS with CLT, the second group (mean age: 19.4 years) was treated with 0.019 × 0.025-inch SS RCOS with zero CLT, the third group (mean age: 18.2 years) was treated with rocking-chair nickel-titanium (NiTi) 0.016 × 0.022-inch with RCOS. Two lateral cephalometric images were taken for each patient, one after alignment and the second after deep bite correction. These images were superimposed using the corpus axis to study the lower incisor horizontal and vertical changes.Results: The lower incisor angular change was significantly smaller in Group II (-0.3°) compared to Group I (4.8°) and Group III (6.0°, P ≤ .001). Lower incisor anterior movement was reduced in Group II compared to Group I (P = .014) and Group III (P = .008). Group III showed significantly more downward movement of the lower Incisors (P ≤ .001). The three groups showed comparable amounts of true intrusion (1 mm, P = .536).Conclusions: 0.016 × 0.022-inch NiTi and 0.019 × 0.025-inch SS with crown labial torque RCOS archwires resulted in similar proclination and forward movement of the lower incisors. Removal of anterior crown labial torque from the 0.019 × 0.025-inch SS RCOS archwire prevents lower incisor proclination and forward movement.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"27-34"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662366/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficacy of planned moderate to severe torque changes in mandibular central incisors with an initial series of Invisalign aligners: a retrospective cohort study. 下颌中切牙中度至重度扭力改变计划与初始系列隐适美矫正器的功效：一项回顾性队列研究。

The Angle orthodontist Pub Date : 2025-01-01 DOI: 10.2319/061724-473.1

Nancy Rajan, Tony Weir, Maurice J Meade

{"title":"Efficacy of planned moderate to severe torque changes in mandibular central incisors with an initial series of Invisalign aligners: a retrospective cohort study.","authors":"Nancy Rajan, Tony Weir, Maurice J Meade","doi":"10.2319/061724-473.1","DOIUrl":"10.2319/061724-473.1","url":null,"abstract":"Objectives: To determine whether the achieved mandibular central incisor lingual root torque (LRT) changes matched the planned changes after treatment with an initial series of Invisalign aligners when ≥10° of torque change was planned.Materials and methods: A sample of adult patients who underwent treatment with the Invisalign appliance between 2013 and 2021 were evaluated. The pretreatment, planned, and achieved posttreatment digital models were measured using Geomagic Control X metrology software. The effect of age, number of prescribed aligners, sex, the presence of power ridges (PRs), and differing weekly wear protocols (WPs) in relation to the achieved LRT changes were determined.Results: Seventy mandibular central incisors from 35 patients satisfied inclusion criteria. The accuracy of the achieved lower incisor LRT compared with that planned was 58.2%. Underexpression of planned torque changes was observed in most incisors (N = 66; 94.3%), with a clinically significant shortfall (≥5°) observed in 68.6% (N = 42) teeth. Patient age, sex, the WP, or the presence of PRs did not influence the differences between planned and achieved outcomes (P > .05). The prescribed number of aligners was influential in the difference between the planned and achieved torque outcomes (P < .01).Conclusions: Underexpression of mandibular central incisor root torque was observed in most incisors in patients when ≥10° change in LRT was planned. Lower incisor LRT was not significantly affected by the presence of PRs or differences in WPs.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":"12-18"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11662367/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142309553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0