American Journal of Orthodontics and Dentofacial Orthopedics最新文献

{"title":"Perception thresholds of dental and gingival asymmetries by orthodontists, dentists, and laypeople when observing close-up smile images using eye tracking technology","authors":"Amin Chaptini ,&nbsp;Joseph Ghoubril ,&nbsp;Marianne Moussallem ,&nbsp;Elie Khoury","doi":"10.1016/j.ajodo.2024.09.007","DOIUrl":"10.1016/j.ajodo.2024.09.007","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to investigate the perception thresholds of dental and gingival asymmetries in close-up smile images for orthodontists, dentists, and laypeople.</div></div><div><h3>Methods</h3><div>Seven sets of close-up smile images were created, in which gingival and dental asymmetries were intentionally incorporated using a software-imaging program. The alterations included unilateral changes to the gingival border and incisal edge of the central and lateral incisors and crown width of the lateral incisor. Combination sets of both dental and gingival asymmetries together were also created. Eye-tracking technology was used to assess visual attention by measuring the fixation duration of the area of the alteration of each image by 195 participants in 3 groups: orthodontists, dentists, and laypeople. Statistical analysis was performed using analysis of variance with Bonferroni adjustment for multiple comparisons, to determine the perception thresholds for each group.</div></div><div><h3>Results</h3><div>Orthodontists and dentists perceived asymmetry of the gingival border of the central incisor at threshold levels of 1 mm, whereas laypeople perceived this asymmetry at 1.5 mm. Dentists and orthodontists were more sensitive to alterations in the gingival border of the lateral incisor, with a threshold of 1 mm, compared with laypeople, who had a threshold of 2 mm. Wear on the central incisor was perceptible at 1 mm for all groups, whereas wear on the lateral incisor was perceptible at 0.5 mm for orthodontists and dentists and 1 mm for laypeople. The perception threshold values for lateral width discrepancy were 2 mm for orthodontists, 3 mm for dentists, and 4 mm for laypeople.</div></div><div><h3>Conclusions</h3><div>On the basis of the perception thresholds found in this study, greater visual attention is drawn toward gingival asymmetries located closer to the midline and dental asymmetries that alter the smile arc.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 177-187"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142512417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Where is the center of resistance?","authors":"Naphtali Brezniak","doi":"10.1016/j.ajodo.2024.10.008","DOIUrl":"10.1016/j.ajodo.2024.10.008","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 136-138"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Automatic 3-dimensional quantification of orthodontically induced root resorption in cone-beam computed tomography images based on deep learning","authors":"Qianhan Zheng ,&nbsp;Lei Ma ,&nbsp;Yongjia Wu ,&nbsp;Yu Gao ,&nbsp;Huimin Li ,&nbsp;Jiaqi Lin ,&nbsp;Shuhong Qing ,&nbsp;Dan Long ,&nbsp;Xuepeng Chen ,&nbsp;Weifang Zhang","doi":"10.1016/j.ajodo.2024.09.009","DOIUrl":"10.1016/j.ajodo.2024.09.009","url":null,"abstract":"<div><h3>Introduction</h3><div>Orthodontically induced root resorption (OIRR) is a common and undesirable consequence of orthodontic treatment. Traditionally, studies employ manual methods to conduct 3-dimensional quantitative analysis of OIRR via cone-beam computed tomography (CBCT), which is often subjective and time-consuming. With advancements in computer technology, deep learning-based approaches have gained traction in medical image processing. This study presents a deep learning-based model for the fully automatic extraction of root volume information and the localization of root resorption from CBCT images.</div></div><div><h3>Methods</h3><div>In this cross-sectional, retrospective study, 4534 teeth from 105 patients were used to train and validate an automatic model for OIRR quantification. The protocol encompassed several steps: preprocessing of CBCT images involving automatic tooth segmentation and conversion into point clouds, followed by segmentation of tooth crowns and roots via the Dynamic Graph Convolutional Neural Network. The root volume was subsequently calculated, and OIRR localization was performed. The intraclass correlation coefficient was employed to validate the consistency between the automatic model and manual measurements.</div></div><div><h3>Results</h3><div>The proposed method strongly correlated with manual measurements in terms of root volume and OIRR severity assessment. The intraclass correlation coefficient values for average volume measurements at each tooth position exceeded 0.95 (<em>P</em> &lt;0.001), with the accuracy of different OIRR severity classifications surpassing 0.8.</div></div><div><h3>Conclusions</h3><div>The proposed methodology provides automatic and reliable tools for OIRR assessment, offering potential improvements in orthodontic treatment planning and monitoring.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 188-201"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142584908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treatment motivation, psychosocial impact, and perfectionism in children and adult orthodontic patients: A cross-sectional study","authors":"Huanzhuo Zhao ,&nbsp;Baraa Daraqel ,&nbsp;Man Jiang ,&nbsp;Tianci Zhang ,&nbsp;Xiang Li ,&nbsp;Jicheng Sun ,&nbsp;Leilei Zheng","doi":"10.1016/j.ajodo.2024.09.012","DOIUrl":"10.1016/j.ajodo.2024.09.012","url":null,"abstract":"<div><h3>Introduction</h3><div>With a shift in orthodontics from a more traditional biomedical model toward a more biopsychosocial model, orthodontists must understand their patients’ psychological condition. This study aimed to investigate treatment motivation, psychosocial impact from malocclusion, and perfectionism in children and adult orthodontic patients and to examine the relationships among these various factors.</div></div><div><h3>Methods</h3><div>A total of 193 participants (114 children and 79 adults) were included. All participants completed a treatment motivation questionnaire, Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ), Frost Multidimensional Perfectionism Scale (FMPS), and self-perceived Aesthetic Component of the Index of Orthodontic Treatment Need. Malocclusion severity was assessed using the Dental Health Component of the Index of Orthodontic Treatment Need by 1 orthodontist.</div></div><div><h3>Results</h3><div>Statistically significant differences were found between children and adults regarding motivation concerning function, PIDAQ total, as well as subscores except for dental self-confidence (<em>P</em> &lt;0.01) and subscores of FMPS, such as concerns over mistakes and parental expectations (<em>P</em> &lt;0.05). The multiple regression analysis demonstrated a direct relationship between PIDAQ and age, gender, total FMPS, self-perceived Aesthetic Component of the Index of Orthodontic Treatment Need, and motivation (<em>P</em> &lt;0.01).</div></div><div><h3>Conclusions</h3><div>Adults anticipate greater improvement in oral function and experience greater negative psychosocial impact from malocclusion compared with children. Orthodontic patients with higher age, being female, high level of perfectionism, or negative self-perception of dental esthetics are associated with greater negative psychosocial impact from malocclusion. In addition, patients experiencing a greater negative psychosocial impact tend to have a strong motivation for orthodontic treatment.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 210-220.e2"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142683323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating anchorage and torque control in adolescent patients with Class II Division 1 malocclusion among 3 appliances","authors":"Huanhuan Chen ,&nbsp;Guangying Song ,&nbsp;Yi Fan ,&nbsp;Jiuhui Jiang ,&nbsp;Ruoping Jiang ,&nbsp;Xiaoyun Zhang ,&nbsp;Gui Chen ,&nbsp;Hong Su ,&nbsp;Tianyi Wang ,&nbsp;Bing Han ,&nbsp;Tianmin Xu","doi":"10.1016/j.ajodo.2024.09.005","DOIUrl":"10.1016/j.ajodo.2024.09.005","url":null,"abstract":"<div><h3>Introduction</h3><div>The objective of this study was to compare the differences in anchorage and torque control among the Tweed edgewise, Roth, and physiological anchorage Spee-wire systems (PASS) appliances (Zhejiang Xinya Technology Co, Ltd, Hangzhou, China).</div></div><div><h3>Methods</h3><div>A sample of 90 adolescent patients with Angle Class II Division 1 malocclusion (30 Tweed edgewise appliances, 30 Roth appliances, and 30 PASS appliances) with maximum anchorage requirements in the maxilla were collected for this study. The pretreatment baseline levels of the 3 groups were compared initially, and then the differences between the 3 appliances in anchorage and torque control were analyzed after superimposing the pretreatment and posttreatment lateral cephalograms and maxillary 3-dimensional (3D) digital models, respectively.</div></div><div><h3>Results</h3><div>There was no statistical difference in the pretreatment baseline levels of 3 groups, including gender, age, sagittal skeletal types (ANB), vertical skeletal types (SN-GoGn), anchorage requirements, and occlusal plane inclination (SN-OP). After superimposing the pretreatment and posttreatment lateral cephalograms and 3D digital models, respectively, no statistical differences were observed between the measurement results obtained from lateral cephalograms and 3D digital models. Among the measurement variables assessed in this study, statistical differences were observed in the mesial displacement of maxillary first molars, the incisor retraction, and the torque variation of maxillary central incisors among the 3 groups. Specifically, the Tweed group exhibited lower mesial displacement of maxillary first molars compared with the PASS and Roth groups. Furthermore, the Tweed group exhibited the greatest amount of incisor retraction and torque variation of maxillary central incisors, followed by the Roth group and then the PASS group. The remaining measurement variables for the 3 groups showed no statistical differences, including vertical variation of maxillary first molars and central incisors, torque variation of maxillary first molars and canines, mesiodistal inclination variation of maxillary first molars and canines, width variation between maxillary first molars, and width variation between maxillary canines.</div></div><div><h3>Conclusions</h3><div>Compared with contemporary preadjusted straight wire appliances, the Tweed edgewise appliance has superiority in molar anchorage control. In contrast, compared with the Roth appliances, the PASS appliances without any auxiliary anchorage devices could make full use of physiological anchorage to achieve adequate control of molar anchorage. Clinical orthodontists may need to pay extra attention to physiological anchorage. The difference in torque control varies depending on the respective characteristics of bracket designs.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 166-176"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142479950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"February 2025","authors":"Dr Allen H. Moffitt (CE Editor)","doi":"10.1016/j.ajodo.2024.12.003","DOIUrl":"10.1016/j.ajodo.2024.12.003","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 253.e1-253.e2"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Directory: AAO Officers and Organizations","authors":"","doi":"10.1016/S0889-5406(24)00540-7","DOIUrl":"10.1016/S0889-5406(24)00540-7","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Page 254"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143156433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"When nondisclosure meets nondisparagement","authors":"Laurance Jerrold","doi":"10.1016/j.ajodo.2024.11.002","DOIUrl":"10.1016/j.ajodo.2024.11.002","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 250-252"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All eyes are on us","authors":"Peter M. Greco","doi":"10.1016/j.ajodo.2024.11.001","DOIUrl":"10.1016/j.ajodo.2024.11.001","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 142-143"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143042351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Author’s response","authors":"Alessandro Bruni","doi":"10.1016/j.ajodo.2024.10.006","DOIUrl":"10.1016/j.ajodo.2024.10.006","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 135-136"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143042750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}