American Journal of Orthodontics and Dentofacial Orthopedics最新文献

{"title":"Computed tomographic assessment of orbital and maxillary dysmorphology in craniofacial microsomia.","authors":"Sarbin Ranjitkar, Jenny Tan, Livana Hamad, Suzanne Edwards, Mustafa Mian, Sarah Constantine, Craig Dreyer, Peter J Anderson","doi":"10.1016/j.ajodo.2025.02.002","DOIUrl":"https://doi.org/10.1016/j.ajodo.2025.02.002","url":null,"abstract":"<p><strong>Introduction: </strong>Mandibular dysmorphology is well-documented in craniofacial microsomia (CFM), but data on midface abnormalities remain limited. This study aimed to compare orbital and maxillary dimensions between the affected and unaffected sides in patients with CFM.</p><p><strong>Methods: </strong>The retrospective cross-sectional study conducted in South Australia comprised 31 patients with CFM and 31 age- and sex-matched control patients (median age 13.2 years; range 0.3-48.4 years; 80.6% children and 19.4% adults; 51.6% males and 48.4% females). Computed tomography reconstructions were assessed bilaterally for 4 orbital and 6 maxillary dimensions in mild, moderate, and severe subgroups, as well as in the control group. Linear mixed-effects models, adjusted for age and sex, were performed to assess whether there were significant differences in the measured dimensions between the sides and groups.</p><p><strong>Results: </strong>Midface asymmetries in patients with CFM were generally commensurate with their severity. In moderate CFM, the affected side showed hypoplastic orbits and maxillae compared with the unaffected side (orbital height: -4.9%; P = 0.018; maxillary middle height: -10.3%; P <0.001). In severe CFM, the reduced maxillary middle height on the affected side (-18.5%; P <0.001) was compensated by increases in the orbital height (+7.0%) and maxillary depth (+6.8%; P = 0.014) (all data adjusted for covariates).</p><p><strong>Conclusions: </strong>CFM is a bilateral condition characterized by orbital and maxillary asymmetries, primarily because of hypoplasia but occasionally involving hyperplasia on the affected side. In severe CFM, compensatory increases in maxillary depth and orbital height often offset midmaxillary height deficiencies.</p>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143634614","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":"A longitudinal study of intermaxillary and intraarch relationships from mixed to permanent dentition: A 4-year follow-up.","authors":"Diego Patrik Alves Carneiro, Caroline Nogueira Moraes, Carolina Carmo de Menezes, Marcelo de Castro Meneghim, Silvia A S Vedovello","doi":"10.1016/j.ajodo.2025.02.006","DOIUrl":"10.1016/j.ajodo.2025.02.006","url":null,"abstract":"<p><strong>Introduction: </strong>This longitudinal study assessed the intermaxillary and intraarch relationships from mixed to permanent dentitions during a 4-year follow-up.</p><p><strong>Methods: </strong>The sample comprised 352 children evaluated for crowding, midline maxillary diastema, anterior spacing, overjet, overbite, and sagittal and transverse relationships in mixed (T1) and permanent (T2) dentition. Data between different time points were compared using McNemar and Bowker symmetry tests, with a significance level of 5%.</p><p><strong>Results: </strong>Of the 352 children evaluated over a 4-year follow-up period, significant changes were observed in the intraarch and intermaxillary relationships from T1 to T2. The intraarch relationship showed significant decreases in crowding (61.3%), maxillary midline diastema (74.3%), and anterior spacing (82.2%) (P <0.0001). Regarding the intermaxillary relationship, statistically significant changes were observed in the overjet (P = 0.003), overbite (P = 0.004), and anteroposterior (P <0.0001) and transverse relationships (P <0.0001). In addition, 43.1% of children had increased overjet at T1 and normal overjet at T2, 29.3% of children with a Class II relationship at T1 and Class I relationship at T2, 70.5% of children with posterior crossbite and normal transverse relationship at T2, and 73.9% of children with anterior open bite and normal overbite at T1 and average overbite at T2.</p><p><strong>Conclusions: </strong>Significant favorable changes in intraarch relationships were observed during the transition from mixed to permanent dentition. Children also show changes in intermaxillary relationships, with a potential improvement in occlusion of the permanent dentition.</p>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143606795","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":"Effects of traditional Chinese medicine pyritum on orthodontic tooth movement in rats.","authors":"Zhuoying Zhang, Jingwei Wang, Chuanqi Hua, Yanpeng Zhang, Wanyu Xi, Ruofang Zhang","doi":"10.1016/j.ajodo.2025.02.003","DOIUrl":"https://doi.org/10.1016/j.ajodo.2025.02.003","url":null,"abstract":"<p><strong>Introduction: </strong>The objective of this study was to investigate the effects of pyritum on tooth movement.</p><p><strong>Methods: </strong>Thirty 9-week-old male Sprague Dawley rats were divided into 3 groups: control group, tooth movement + saline (TM+S) group, and tooth movement + pyritum (TM+P) group. The OTM model was established in both the TM+S group and the TM+P group. TM+P group received a local injection of pyritum decoction, whereas the other 2 groups received normal saline. Tooth movement distance was measured after 7 and 14 days. Histologic stains included hematoxylin and eosin staining for tissue morphology, tartrate-resistant acid phosphatase staining for osteoclasts, and immunohistochemistry for receptor activator of nuclear factor kappa β ligand (RANKL), osteoprotegerin (OPG), runt-related protein 2, and 5-bromo-2'-dexoyuridine.</p><p><strong>Results: </strong>At day 14, local injection of pyritum significantly (P <0.05) slowed down tooth movement, with the number of osteoclasts in the TM+P group significantly (P <0.05) reduced than that in the TM+S group. Runt-related protein 2 demonstrated higher expression in the TM+P group than in the TM+S group on both pressure and tension sides (P <0.05). The number of 5-bromo-2'-dexoyuridine-positive cells on the tension side in the TM+P group was significantly (P <0.05) higher than that in the TM+S group. RANKL expression on the pressure side in the TM+P group was significantly (P <0.05) lower than that in the TM+S group, whereas OPG expression exhibited an opposite trend. On days 7 and 14, the RANKL/OPG ratio in the TM+P group was significantly (P <0.05) lower than that in the TM+S group.</p><p><strong>Conclusions: </strong>The study indicated that pyritum was capable of slowing down the speed of tooth movement while potentially promoting bone formation and inhibiting bone resorption.</p>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143587955","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":"Infraoccluded first permanent molars and their association with facial and skeletal development.","authors":"Zehava Geller Fishman, Avi Leibovich, Heli Rushinek, Roberta Lione, Paola Cozza, Adrian Becker, Stella Chaushu","doi":"10.1016/j.ajodo.2025.02.004","DOIUrl":"https://doi.org/10.1016/j.ajodo.2025.02.004","url":null,"abstract":"<p><strong>Introduction: </strong>Permanent molar infraocclusion, usually caused by ankylosis, has been scarcely studied. Unilateral first molar infraocclusion (UFMI) restricts alveolar bone development locally, leading to asymmetrical dental arches and occlusion. This study investigates whether its effect extends beyond dental structures to affect facial and skeletal asymmetries.</p><p><strong>Methods: </strong>A retrospective analysis was conducted on consecutively recruited patients with UFMI in comparison with age- and gender-matched controls. The percentage of patients with occlusal cant (OC), chin deviation (CD), and the mean vertical asymmetry index (VAI), rami length difference ratios (RLD), and condyle length difference ratios were evaluated. For clinical significance, the percentage of patients with VAI and RLD values >3% was compared. The effect of age and jaw were studied.</p><p><strong>Results: </strong>The UFMI group consisted of 29 patients, 16 males and 13 females, mean age of 13.4 ± 3.8 years. Patients with UFMI displayed significantly more CD and OC and higher VAI and RLD ratios vs the controls (59.0% vs 14.0%, 38.0% vs 7.0%, 3.2% vs 1.0%, and 4.0% vs 2.0%, respectively). VAI >3% was found in 34.5% of patients with UFMI and none of the controls (P <0.001). RLD ratios >3% were found in 51.7% of UFMI vs 24% controls (P = 0.030). CD and OC prevalence significantly increased with age in the UFMI group. Maxillary UFMI influenced more than mandibular UFMI.</p><p><strong>Conclusions: </strong>UFMI is linked to significant facial and skeletal asymmetry, particularly in older age groups. These findings highlight the potential relevance of early diagnosis and intervention to mitigate potential long-term influence on facial growth and development.</p>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143587959","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":"Artificial intelligence-assisted identification and assessment of mandibular asymmetry on panoramic radiography.","authors":"Wanting Qu, Zelin Qiu, Kwong Chuen Lam, Koshla Guna Sakaran, Hao Chen, Yifan Lin","doi":"10.1016/j.ajodo.2025.01.018","DOIUrl":"https://doi.org/10.1016/j.ajodo.2025.01.018","url":null,"abstract":"<p><strong>Introduction: </strong>Mandibular symmetry is crucial in orthodontic diagnosis and treatment planning. This study aimed to establish an artificial intelligence (AI) method to automatically and accurately identify mandibular landmarks and assess asymmetry via orthopantomography (OPG) radiographs.</p><p><strong>Methods: </strong>A total of 1038 OPG radiographs (451 mixed and 587 permanent dentitions) were collected and annotated to develop the AI model for identifying mandibular landmarks. First, the mesiodistal widths of the bilateral mandibular first molars were compared to categorize images as horizontally distorted or nondistorted. Next, the efficacy and robustness of the model were assessed through landmark identification, measurement, and asymmetry diagnostics accuracy using successful detection rates and interclass correlation coefficient.</p><p><strong>Results: </strong>The AI model achieved an average landmark detection error of 0.86 ± 0.95 mm, with 0.97 ± 0.99 mm for bony landmarks and 0.54 ± 0.84 mm for dental landmarks. The successful detection rates at 1, 2, and 3 mm were 75.33%, 93.11%, and 96.72%, respectively. The accuracy exhibits region-specific variations: vertical errors were larger in condylar landmarks, whereas horizontal errors were more pronounced in the mandibular gonial angle (P <0.05). The AI and manual methods show high consistency in all measurements (interclass correlation coefficient >0.983). Condyle landmarks were more accurate in permanent dentition, whereas mandibular angle landmarks were more precise in mixed dentition (P <0.05). Furthermore, the model achieved 82.52% and 75.24% diagnostic accuracy when using gonial angle and total ramal height.</p><p><strong>Conclusions: </strong>The AI model accurately identifies anatomic landmarks and assesses mandibular asymmetry in OPG radiographs, demonstrating generalizability and robustness across different dentitions and showcasing potential as a promising diagnostic tool in clinical practice.</p>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568793","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":"March 2025","authors":"Dr Allen H. Moffitt (CE Editor)","doi":"10.1016/j.ajodo.2025.01.004","DOIUrl":"10.1016/j.ajodo.2025.01.004","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 3","pages":"Pages 375.e1-375.e2"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478975","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":"The art of communication","authors":"Peter M. Greco","doi":"10.1016/j.ajodo.2024.12.002","DOIUrl":"10.1016/j.ajodo.2024.12.002","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 3","pages":"Page 255"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478979","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(25)00034-4","DOIUrl":"10.1016/S0889-5406(25)00034-4","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 3","pages":"Page 376"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478976","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":"Referral liability? Perhaps, perhaps not","authors":"Laurance Jerrold","doi":"10.1016/j.ajodo.2024.12.001","DOIUrl":"10.1016/j.ajodo.2024.12.001","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 3","pages":"Pages 371-374"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478974","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":"Information for readers","authors":"","doi":"10.1016/S0889-5406(25)00027-7","DOIUrl":"10.1016/S0889-5406(25)00027-7","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 3","pages":"Page A9"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478978","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}