American Journal of Orthodontics and Dentofacial Orthopedics最新文献

{"title":"Author’s response","authors":"Noriaki Yoshida","doi":"10.1016/j.ajodo.2024.10.009","DOIUrl":"10.1016/j.ajodo.2024.10.009","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 138-139"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043033","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 time to change the orthodontic biomechanics is now","authors":"Naphtali Brezniak","doi":"10.1016/j.ajodo.2024.09.015","DOIUrl":"10.1016/j.ajodo.2024.09.015","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 139-140"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043087","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":"Transverse dentoalveolar development in Chinese children and adolescents: A cross-sectional study using revised Andrews’ Element III analysis","authors":"Jie Shen ,&nbsp;Zhongyu Liu ,&nbsp;Jing Shuai ,&nbsp;Yijia Yin ,&nbsp;Zheng Wang ,&nbsp;Wanghui Ding ,&nbsp;Chun-Hsi Chung ,&nbsp;Qianming Chen ,&nbsp;Xuefeng Zhao","doi":"10.1016/j.ajodo.2024.08.015","DOIUrl":"10.1016/j.ajodo.2024.08.015","url":null,"abstract":"<div><h3>Introduction</h3><div>This study investigated the prevalence of maxillary transverse deficiency (MTD) in Chinese children and adolescents using revised Andrews’ Element III analysis and studied transverse developmental characteristics of the maxillomandibular complex.</div></div><div><h3>Methods</h3><div>Plaster or digital casts of 794 participants aged 7-18 years were evaluated. MTD was diagnosed when the maxilla-mandible width difference, represented by the decompensated maxillary and mandibular first molars, exceeded 4 mm.</div></div><div><h3>Results</h3><div>The average prevalence of MTD among patients aged 7-18 years was 31.1%. Patients with MTD exhibited narrower maxillary and/or wider mandibular arches. Strikingly, 32.3% of participants with posterior crossbite because of local crowding or mandibular deviation were not diagnosed with MTD. Dental compensation, such as a greater buccolingual inclination of the first molars, was common in patients with MTD. Transverse growth of the maxillomandibular complex was completed by 17 years old, with the maxilla undergoing greater transverse growth than the mandible. The physiological buccolingual inclination of first molars was observed in patients without MTD. The 95% reference value of the palatal arch width was 31.9-42.3 mm.</div></div><div><h3>Conclusions</h3><div>The prevalence of MTD is 31.1% among Chinese children and adolescents. However, it is often camouflaged by dental compensation and sagittal discrepancy. The etiology of MTD is uncoordinated width in the maxillomandibular complex, which is not solely attributed to a narrow maxilla but also to an excessively wide mandible. To enhance diagnostic accuracy, individualized measurements of the maxillomandibular complex and a revised dental decompensation formula, rather than posterior crossbite alone, are recommended for transverse diagnosis. A potential presence of MTD is indicated when the palatal arch width is &lt;31.9 mm.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 144-153"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142512418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of luteolin on orthodontic tooth movement and relapse","authors":"Wenkai Huang,&nbsp;Haopeng Wu,&nbsp;Bowen Zheng,&nbsp;Yi Liu","doi":"10.1016/j.ajodo.2024.09.011","DOIUrl":"10.1016/j.ajodo.2024.09.011","url":null,"abstract":"<div><h3>Introduction</h3><div>Luteolin is a natural flavonoid compound that widely exists in human food. Studies have demonstrated luteolin has powerful anti-inflammatory properties and can affect bone remodeling in an inflammatory environment. This study aimed to investigate the effect of luteolin on orthodontic tooth movement (OTM) and relapse after OTM.</div></div><div><h3>Methods</h3><div>Male Sprague Dawley rats were randomly divided into 3 groups (n = 8): OTM, 50 mg/kg/d luteolin, and 100 mg/kg/d luteolin. Then, 50 g of orthodontic force was applied to all animals. A saline solution or corresponding concentration of luteolin was given orally. For the OTM experiment, after 14 days of force application, rats were killed, the maxilla was dissected, and then microcomputed tomography, histologic staining, and western blotting were performed. For the relapse experiment, the spring was removed, and a silicone impression was made to record the relapse status.</div></div><div><h3>Results</h3><div>Compared with the OTM alone group, systemic administration of luteolin inhibited OTM and tooth relapse (<em>P</em> &lt;0.05). Increased bone volume, reduced osteoclast activity, and a decrease in osteoclastogenesis-related protein expression were observed in luteolin-treated groups. These effects may be attributed to the inhibition of the nuclear factor-kappa B pathway.</div></div><div><h3>Conclusions</h3><div>Luteolin can significantly inhibit OTM and relapse after OTM. Thus, luteolin is a prospective candidate for enhancing tooth anchorage and preventing relapse in orthodontic treatment.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 232-241"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142584910","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 cone-beam computed tomography study of deformational plagiocephaly and its influence on condylar position and menton deviation in subjects with Class I skeletal pattern","authors":"He-Kyong Kang ,&nbsp;Jasmine Cheema ,&nbsp;Richard Kaczynski ,&nbsp;Valmy Pangrazio-Kulbersh","doi":"10.1016/j.ajodo.2024.09.010","DOIUrl":"10.1016/j.ajodo.2024.09.010","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to explore the distribution of deformational plagiocephaly in subjects with Class I skeletal pattern and the relationships of cranial vault asymmetry with menton deviation, condylar anteroposterior (AP) position and condylar angulation using cone-beam computed tomography images.</div></div><div><h3>Methods</h3><div>Approximately 135 pretreatment records of patients with skeletal Class I growth patterns from the University of Detroit Mercy were examined using Anatomage Invivo6 software. The midsagittal plane constructed by nasion, incisive foramen, and basion was used to evaluate the asymmetry of the cranium vault, condyles, and menton deviation. For each patient, the radiographic cranial vault asymmetry (RCVA) was calculated and compared against condylar and chin measurements: the horizontal condylar angle, AP positions of the condyles, and menton deviation.</div></div><div><h3>Results</h3><div>The Pearson correlation showed no direct correlation between RCVA and the mandibular variables (menton deviation and condylar measurements). The only mandibular variable that showed interaction with RCVA was the AP position discrepancy between the right and left condyles.</div></div><div><h3>Conclusions</h3><div>The severity of cranial vault asymmetry did not correlate to the asymmetry of the horizontal condylar angle, AP condylar position, and chin deviation. A tendency toward a relation between cranial asymmetry and AP positions of right and left condyles was observed.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 202-209"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142632219","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":"Assessment of deep learning technique for fully automated mandibular segmentation","authors":"Ebru Yurdakurban ,&nbsp;Yağızalp Süküt ,&nbsp;Gökhan Serhat Duran","doi":"10.1016/j.ajodo.2024.09.006","DOIUrl":"10.1016/j.ajodo.2024.09.006","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to assess the precision of an open-source, clinician-trained, and user-friendly convolutional neural network-based model for automatically segmenting the mandible.</div></div><div><h3>Methods</h3><div>A total of 55 cone-beam computed tomography scans that met the inclusion criteria were collected and divided into test and training groups. The MONAI (Medical Open Network for Artificial Intelligence) Label active learning tool extension was used to train the automatic model. To assess the model’s performance, 15 cone-beam computed tomography scans from the test group were inputted into the model. The ground truth was obtained from manual segmentation data. Metrics including the Dice similarity coefficient, Hausdorff 95%, precision, recall, and segmentation times were calculated. In addition, surface deviations and volumetric differences between the automated and manual segmentation results were analyzed.</div></div><div><h3>Results</h3><div>The automated model showed a high level of similarity to the manual segmentation results, with a mean Dice similarity coefficient of 0.926 ± 0.014. The Hausdorff distance was 1.358 ± 0.466 mm, whereas the mean recall and precision values were 0.941 ± 0.028 and 0.941 ± 0.022, respectively. There were no statistically significant differences in the arithmetic mean of the surface deviation for the entire mandible and 11 different anatomic regions. In terms of volumetric comparisons, the difference between the 2 groups was 1.62 mm³, which was not statistically significant.</div></div><div><h3>Conclusions</h3><div>The automated model was found to be suitable for clinical use, demonstrating a high degree of agreement with the reference manual method. Clinicians can use open-source software to develop custom automated segmentation models tailored to their specific needs.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 242-249"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143042495","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":"Microcomputed tomography assessment of microleakage and void formation under ceramic adhesive precoated orthodontic brackets","authors":"Artemisa Adıgüzel,&nbsp;Ersin Yıldırım","doi":"10.1016/j.ajodo.2024.09.013","DOIUrl":"10.1016/j.ajodo.2024.09.013","url":null,"abstract":"<div><h3>Introduction</h3><div>This study aimed to evaluate microleakage, voids, and gaps in ceramic adhesive precoated (APC) brackets using microcomputed tomography and investigate their correlation with bond strength.</div></div><div><h3>Methods</h3><div>A total of 52 human premolars were included in this study. The teeth were randomly divided into 4 groups of 13 teeth each. The brackets used in this study were the Clarity Advanced APC Flash-free Ceramic Bracket (3M Unitek, Monrovia, Calif) and the Clarity Advanced Ceramic Bracket (3M Unitek, Monrovia, Calif). The materials used for each group were as follows: (1) 37% phosphoric acid, Transbond XT primer (3M Unitek, Monrovia, Calif), and APC Flash-free Ceramic Bracket; (2) Transbond Plus self-etching primer and APC Flash-free Ceramic Bracket; (3) 37% phosphoric acid, Transbond XT primer, Transbond XT light-cure adhesive, and Clarity Advanced Ceramic Bracket; and (4) Transbond Plus self-etching primer, Transbond XT light-cure adhesive, and Clarity Advanced Ceramic Bracket. The teeth were scanned using microcomputed tomography for microleakage, void, and gap analyses. The bond strength was measured and recorded in megapascals. One-way analysis of variance was used to compare parameters with a normal distribution. The Kruskal-Wallis test was used to compare parameters that did not comply with the normal distribution. The relationships among variables were evaluated using Spearman and Pearson correlation coefficients.</div></div><div><h3>Results</h3><div>There were no statistically significant differences among the groups in terms of gap volume, void volume, and total void and gap volume values (<em>P</em> &gt;0.05). No significant differences were observed in relation to bond strength (<em>P</em> &gt;0.05). The mean bond strength was 20.42, 19.87, 19.28, and 19.47 for groups 1-4, respectively. The Spearman’s correlation analysis results demonstrated that the bond strength was significantly affected by the gap volume and total void and gap volumes. The bond strength increased with reduced total volume of voids and gaps.</div></div><div><h3>Conclusions</h3><div>There was no difference between the APC Flash-free Ceramic Bracket and the Clarity Advance Ceramic Bracket regarding bond strength, void volume, gap volume, and total void and gap volume. The gap volume and total void and gap volumes significantly affected the bond strength. The bond strength increased with decreased total void and gap volumes. The bond strengths of the APC Flash-free Ceramic Brackets were comparable to those of the ceramic brackets bonded using the conventional method.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Pages 221-231"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142711795","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":"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":"The artificial restraint and the center of resistance location","authors":"Naphtali Brezniak","doi":"10.1016/j.ajodo.2024.09.014","DOIUrl":"10.1016/j.ajodo.2024.09.014","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"167 2","pages":"Page 135"},"PeriodicalIF":2.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143043034","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}