Dental Press Journal of Orthodontics最新文献

{"title":"Association between tooth agenesis and developmental dental anomalies: an observational study with machine learning analysis.","authors":"Guilherme Henrique Borges, Walbert A Vieira, Isabela Vinhal Henriques, Lígia Machado Silva, Rubens Spin-Neto, Marcos Alan Vieira Bittencourt, Luiz Renato Paranhos","doi":"10.1590/2177-6709.31.3.e2625183.oar","DOIUrl":"10.1590/2177-6709.31.3.e2625183.oar","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the prevalence of tooth agenesis and its association with other developmental dental anomalies in non-syndromic patients. The study also evaluated the applicability of machine learning models to predict the occurrence of agenesis.</p><p><strong>Methods: </strong>This cross-sectional observational study analyzed 4,990 panoramic radiographs from radiology centers in Uberlândia, Minas Gerais/Brazil. It assessed the presence of tooth agenesis and associated anomalies, such as palatal displacement of canines, distoangulation of lower second premolars, tooth transposition, infraocclusion of deciduous molars, mesioangulation of lower second molars, and supernumerary teeth. The tooth agenesis code (TAC) mapped the patterns of occurrence. Fisher's exact test, Student's t-test, and logistic regression were used to analyze the data (p < 0.05). The machine learning models used included Decision Tree, Random Forest, XGBoost, Support Vector Machine, and Deep Learning.</p><p><strong>Results: </strong>Agenesis was found in 6.1% of patients, with a higher prevalence in females (57.6%) and younger individuals (mean age of 16.8 years). Dental transposition (OR: 19.11; p < 0.001), maxillary canine displacement (OR: 2.08; p < 0.001), and deciduous molar infraocclusion (OR: 147.73; p < 0.001) showed a significant association. The Random Forest model showed the best predictive performance, but with clinical limitations.</p><p><strong>Conclusion: </strong>Tooth agenesis is associated with an increased risk of other anomalies, highlighting the importance of early diagnosis and integrated therapeutic approaches.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 3","pages":"e2625183"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13450905/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148725867","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}

{"title":"Comparative evaluation of RANKL and OPG levels in gingival crevicular fluid and saliva during orthodontic treatment using thermoformed and direct-printed aligners.","authors":"Pooja Lakshmanan, Shivakumar Baskaran, Swarna Alamelu, Karthick Baskar","doi":"10.1590/2177-6709.31.3.e2625300.oar","DOIUrl":"10.1590/2177-6709.31.3.e2625300.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Orthodontic tooth movement (OTM) is regulated by alveolar bone remodeling through the receptor activator of nuclear factor kappa-B ligand (RANKL) and osteoprotegerin (OPG) axis. Clear plastic aligners (CPAs), available as thermoformed and direct-printed variants, differ in force delivery and material properties, influencing biomarker responses.</p><p><strong>Objective: </strong>This prospective pilot randomized study compared salivary and gingival crevicular fluid (GCF) levels of RANKL and OPG during treatment with thermoformed and direct-printed aligners, and evaluated correlations between saliva and GCF.</p><p><strong>Material and methods: </strong>Eight healthy adults (18-40 years) requiring orthodontic treatment were randomly assigned to thermoformed or direct-printed aligners. GCF and unstimulated saliva were collected at baseline and at 1, 2, 3, 4, and 6 weeks. RANKL and OPG were quantified using ELISA, and data were analyzed with SPSS v21.0 (IBM, USA).</p><p><strong>Results: </strong>Thermoformed aligners exhibited a peak in GCF RANKL at 3 weeks, followed by a decline at 6 weeks. Direct-printed aligners showed a gradual reduction, with significantly lower RANKL at 4 and 6 weeks (p < 0.05). OPG levels were consistently higher in the direct-printed group across all time points in saliva and GCF (p < 0.05). Salivary OPG strongly correlated with GCF OPG at baseline, 3, and 6 weeks, while RANKL correlations were higher during later treatment phases.</p><p><strong>Conclusion: </strong>Aligner types elicited biomarker responses consistent with bone remodeling. Direct-printed aligners demonstrated a trend toward a more stable, OPG-dominant biological response. These findings should be interpreted cautiously, due to the pilot nature of the study. Saliva correlated with GCF, supporting its use as a non-invasive biomarker source. Larger longitudinal studies are warranted.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 3","pages":"e2625300"},"PeriodicalIF":0.0,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13450903/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148721945","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}

{"title":"Force systems and the function of attachments in aligner biomechanics: an analytical approach.","authors":"Wendel Shibasaki, Wislei de Oliveira","doi":"10.1590/2177-6709.31.2.e26spe2","DOIUrl":"10.1590/2177-6709.31.2.e26spe2","url":null,"abstract":"<p><strong>Introduction: </strong>The growing adoption of aligners contrasts with the lack of clear foundation in the literature regarding their activation methods. Studies often focus on effectiveness or estimated forces, lacking rational standardization and frequently presenting results that conflict with clinical practice.</p><p><strong>Objective: </strong>This article analyzes the theoretical inconsistencies about how aligners work and proposes an alternative analytical approach to understand the force system they generate. It also explores how the use of attachments can modulate the direction of these forces to enable specific orthodontic movements.</p><p><strong>Methods: </strong>To assess aligner activation, a two-dimensional model representing a maxillary central incisor was developed. This model, using palatal tipping and extrusion movements, enabled analysis of the aligner's activation mechanism and the influence of attachments on force redistribution.</p><p><strong>Results: </strong>The analysis showed consistency with previous studies, providing a rational explanation for aligner activation in these movements. Attachments proved essential in modifying force distribution, enabling displacements beyond the buccolingual axis.</p><p><strong>Conclusions: </strong>In their current configuration, aligners predominantly generate normal buccal and lingual compressive forces through flexion, lacking intrinsic capacity to produce orthodontically useful forces such as traction, torsion, or shearing in the buccal and lingual planes. However, the strategic use of attachments allows interception of the aligner's deactivation and redirection of a fraction of the original forces, making other types of orthodontic movements feasible. This highlights the need for a rigorous biomechanical approach for each necessary movement for each tooth, to optimize aligner efficiency in clinical treatments.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e26spe2"},"PeriodicalIF":0.0,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13316881/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148309858","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}

{"title":"Adolescents' self-recognition of their facial profile: associations with wellbeing, self-esteem and sociodemographic factors.","authors":"Cristiane Braga Machado-Silva, Saul Martins Paiva, Jéssica Madeira Bittencourt, Leniana Santos Neves, Cristiane Baccin Bendo","doi":"10.1590/2177-6709.31.2.e2625306.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625306.oar","url":null,"abstract":"<p><strong>Objective: </strong>To examine the accuracy of adolescents' self-recognition based on their facial profiles and determine the influence of sociodemographic characteristics and perceived well-being and self-esteem on this ability.</p><p><strong>Methods: </strong>A cross-sectional study was conducted with 158 adolescents (10-19 years old) who were either students or patients at the School of Dentistry, Federal University of Minas Gerais, Brazil. The facial profile of adolescent was photographed and included on a template of ten profile photographs, being nine standardized photographs and one was the participant's own photograph. The adolescent was asked to recognize her/his own profile among these ten photographs. Perceived self-esteem was measured by the Brazilian version of the Rosenberg Self-Esteem Scale. A questionnaire addressed sociodemographic characteristics, with one item assessing whether the adolescent's wellbeing was affected by her/his oral condition. Adjusted Poisson regression was performed (p<0.05).</p><p><strong>Results: </strong>Adolescents 17 to 19 years of age were 1.78 times more likely to recognize their own facial profile, compared to adolescents 10 to 13 years of age (95%CI:1.31-2.43). Adolescents' perception that their general wellbeing was impacted by their oral conditions were less likely to recognize their own facial profile compared to those whose did not perceive this impact (PR = 0.72; 95% CI: 0.55-0.94).</p><p><strong>Conclusions: </strong>Older adolescents were more likely to recognize their own facial profile, while those reporting that oral health concerns affected their well-being showed poorer recognition ability. Engaging adolescents in decisions and considering their perceptions enhances satisfaction, adherence, and treatment outcomes.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625306"},"PeriodicalIF":0.0,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13316879/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148309919","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}

{"title":"Influence of incisor display and lower lip height on smile esthetics and perceived age.","authors":"Juliana do Espírito Santo Russo, Rafael Cunha Bittencourt, Daniella Mascarenhas Calixto Barros, Rebeca Passeri de Almeida, Diego Coelho Lorenzoni, Sergio Luiz Mota-Júnior, Claudia Trindade Mattos","doi":"10.1590/2177-6709.31.2.e2625302.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625302.oar","url":null,"abstract":"<p><strong>Objective: </strong>This study investigated the perception of smile attractiveness and age estimation based on different proportions of maxillary and mandibular incisor exposure, combined with changes in lower lip vermilion height.</p><p><strong>Methods: </strong>Smile photographs were digitally modified to create images with varying proportions of incisor exposure (100%, 80%, 60%, 40%, and 20% maxillary incisor exposure) and reduced or unaltered lower lip vermilion height. A total of 162 evaluators, including orthodontists, dentists, and laypersons, rated attractiveness using a 10-point visual analog scale and estimated the apparent age range (<30, 30-50, >50).</p><p><strong>Results: </strong>Maxillary incisor exposure significantly affected smile attractiveness, with higher exposure levels (100% and 80%) receiving higher attractiveness scores across all evaluator groups (p < 0.05). Reduction in lower lip vermilion height did not result in statistically significant differences in attractiveness ratings or age estimation (p > 0.05). Orthodontists assigned significantly lower attractiveness scores than dentists and laypersons (p < 0.05). Increased mandibular incisor exposure was significantly associated with the perception of an older apparent age (p < 0.05). Older laypersons demonstrated greater tolerance toward smiles with increased mandibular incisor exposure (p < 0.05).</p><p><strong>Conclusions: </strong>These findings suggest that the proportion of maxillary and mandibular incisor exposure plays a significant role in the perception of smile attractiveness and age estimation. Furthermore, they highlight the importance of considering individual preferences in dental treatment planning. The results of this study have direct implications for clinical practice in Orthodontics and Esthetic Dentistry, providing valuable guidance for treatment planning and patient communication.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625302"},"PeriodicalIF":0.0,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13316878/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148309897","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}

{"title":"Catastrophizing questionnaire: translation and psychometric validation in Brazilian adult orthodontic patients.","authors":"Tony Vieira Faria, Luiz Gonzaga Gandini, Lucas Arrais Campos","doi":"10.1590/2177-6709.31.2.e2625245.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625245.oar","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to translate, culturally adapt, and estimate the psychometric properties of the Catastrophizing Questionnaire (CQ) for use in Portuguese among orthodontic patients.</p><p><strong>Methods: </strong>The translation process followed international guidelines, including forward and backward translation. Confirmatory factor analysis (CFA) was conducted to assess factorial validity, using indices such as the Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), Root Mean Square Error of Approximation (RMSEA), and Standardized Root Mean Square Residual (SRMR). Convergent validity [Average Variance Extracted (AVE)] and reliability were estimated.</p><p><strong>Results: </strong>A total of 334 Brazilian orthodontic patients (74.6% female, mean age = 30.6 years, standard deviation 12.4) participated in the study. The factor model of the Portuguese version of CQ presented an adequate fit to the data (CFA: CFI = 0.95, TLI = 0.94, RMSEA = 0.07, and SRMR = 0.06). Reliability was acceptable (α and ω ≥ 0.93). Although the AVE was slightly below the recommended threshold (AVE = 0.41), the overall model fit and internal consistency supported the adequacy of convergent validity.</p><p><strong>Conclusion: </strong>The Portuguese CQ showed adequate psychometric properties for assessing catastrophizing in Brazilian adult orthodontic patients. As a pain-independent measure, it enables the early identification of catastrophizing tendencies before appliance placement, supporting a patient-centered approach. By helping clinicians recognize individual psychosocial vulnerabilities, the CQ can guide tailored communication and management strategies aimed at improving the overall treatment experience.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625245"},"PeriodicalIF":0.0,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13316880/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148309874","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}

{"title":"Pediatric validation of an AI-assisted smartphone application (WebCeph) for cephalometric analysis: reliability, reproducibility and time-efficiency assessment.","authors":"Rohan Shinde, Dinesh Rao, Sunil Panwar, Manan Phalke","doi":"10.1590/2177-6709.31.2.e2625274.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625274.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Although AI-assisted cephalometric applications are widely used, most validation studies involve adult radiographs. Pediatric craniofacial landmarks show greater variability due to growth, which may influence automated landmark accuracy. Therefore, pediatric-specific validation of AI-based smartphone cephalometry is essential.</p><p><strong>Objective: </strong>This study evaluated the reliability, reproducibility, and time-efficiency of an AI-assisted smartphone application (WebCeph) compared with manual cephalometric tracing in children.</p><p><strong>Methods: </strong>A retrospective cross-sectional study was conducted on 51 lateral cephalograms of children aged 7-12 years. Manual tracings were performed by a calibrated examiner, and digital tracings were obtained using the WebCeph Android application. Linear and angular measurements were recorded for both methods. Intra-examiner reliability was assessed using intraclass correlation coefficients (ICC). Agreement between methods was evaluated using paired t-tests and Cohen's d. Tracing time was documented, and normality was confirmed using the Shapiro-Wilk test.</p><p><strong>Results: </strong>Both methods demonstrated high reliability. Most parameters showed no significant differences, although a few (SNA, ANB, L1-MP) showed statistically significant but clinically negligible discrepancies. ICC values indicated excellent agreement. WebCeph significantly reduced analysis time (9.4 ± 1.82 minutes), compared with manual tracing (19.4 ± 2.65 minutes).</p><p><strong>Conclusion: </strong>The WebCeph AI-assisted smartphone application provides reliable and clinically comparable cephalometric measurements to manual tracing in pediatric patients, with substantial time savings. It may serve as an efficient adjunct to routine pediatric orthodontic diagnostics, with consideration for growth-related landmark variability.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625274"},"PeriodicalIF":0.0,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13185514/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147976233","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}

{"title":"When does Orthodontics make a difference? Threshold effects in attractiveness perception and hiring intentions.","authors":"Gil Guilherme Gasparello, Otso Tirkkonen, Sergio Luiz Mota-Júnior, Caroline Souza Dos Santos, Felipe Calgaro Martins, Victoria Machado Pereira, Matheus Melo Pithon, Orlando Motohiro Tanaka","doi":"10.1590/2177-6709.31.2.e2625314.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625314.oar","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the impact of orthodontic treatment on perceived smile attractiveness and hiring decisions in a Brazilian adult population.</p><p><strong>Methods: </strong>A cross-sectional observational study was conducted with 288 adult participants recruited via an online survey. Three clinical cases were selected, and standardized pre- and post-treatment smile photographs were shown in randomized order. Participants rated attractiveness on a 0-100 Visual Analog Scale (VAS) and indicated hiring intention (\"yes,\" \"no,\" or \"can't tell\"). Descriptive statistics, Mann-Whitney U tests, chi-square tests, and logistic mixed-effects regression models were used for data analysis.</p><p><strong>Results: </strong>Post-treatment images showed significantly higher attractiveness ratings, compared with pre-treatment images (mean VAS: 54.2 vs. 36.4; p < 0.001). Hiring likelihood also increased after orthodontic treatment (44.0% vs. 27.9%; p < 0.001). Affirmative hiring decisions were consistently associated with higher attractiveness scores. In multivariable analysis, attractiveness was a significant independent predictor of hiring intention, while the interaction between VAS and treatment status was not significant (p = 0.201). Individual-level assessments demonstrated that many participants initially classified as non-hireable were reevaluated positively after treatment.</p><p><strong>Conclusions: </strong>Orthodontic treatment significantly improved smile attractiveness and increased hiring likelihood. Dental alignment alone was sufficient to shift social judgments, although overall facial esthetics also contributed. The identified attractiveness threshold marked the point at which orthodontic improvement began to influence employability perceptions. These findings highlight the psychosocial relevance of orthodontics beyond functional benefits.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625314"},"PeriodicalIF":0.0,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13185512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147976257","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}

{"title":"Accuracy of cephalometric landmark identification on artificial intelligence-based software: a comparative study.","authors":"İpek Şavkan, Sara Nur Özçankaya, Öykü Naz Turan","doi":"10.1590/2177-6709.31.2.e2625144.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625144.oar","url":null,"abstract":"<p><strong>Introduction: </strong>Cephalometry has long been a cornerstone of orthodontic diagnosis and treatment planning. While traditionally performed manually, cephalometric analysis has increasingly shifted toward semi-automated or fully automated computer-based software, due to advances in technology.</p><p><strong>Objective: </strong>This study aims to evaluate and compare the accuracy of anatomical landmarks identified manually by orthodontists using digital tools versus those identified automatically by various artificial intelligence (AI)-based cephalometric software.</p><p><strong>Methods: </strong>A total of 25 lateral cephalometric radiographs were selected for analysis. Manual landmark identification was independently performed by two orthodontists using the digital cephalometric software NemoCeph. These were compared to the automatic landmark identifications generated by two AI-based programs: CephNinja and WebCeph™. A total of 17 anatomical landmarks, 15 hard tissue and 2 soft tissue points, were evaluated. The 17 cephalometric landmarks selected in this study are among the most commonly used and reliably identifiable reference points in the literature. To facilitate direct visual comparison, landmark positions derived from all three methods were overlaid using semi-transparent image layers. One-way ANOVA and intraclass correlation coefficient (ICC) tests were conducted to assess inter-method differences. The threshold for statistical significance was set at p < 0.05 and p < 0.01.</p><p><strong>Results: </strong>Statistically significant differences were observed at the porion, basion, gonion, and the apexes of the upper and lower incisors (p < 0.05). Compared to the manual tracings in NemoCeph, AI-based software generally placed these landmarks in more distal and superior positions. Among the AI tools, CephNinja showed greater similarity to NemoCeph for the gonion and basion points, while WebCeph™ was closer at the incisor apexes.</p><p><strong>Conclusion: </strong>Although AI-based cephalometric software offers rapid and reproducible assessments, certain anatomical landmarks - particularly porion, basion, gonion, and the apexes of the upper and lower incisors - demonstrate statistically significant positional discrepancies, compared to manual tracings. Clinicians should be cautious when relying exclusively on automated analyses for diagnostic or treatment planning purposes, since AI struggles with certain landmarks, due to algorithmic limitations.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625144"},"PeriodicalIF":0.0,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13185511/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147976248","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}

{"title":"The effect of using dental loupes on the accuracy of aligner attachments and flash adhesive area after bonding.","authors":"Servet Erbaş, Ezgi Atik","doi":"10.1590/2177-6709.31.2.e2625190.oar","DOIUrl":"10.1590/2177-6709.31.2.e2625190.oar","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to assess whether the use of dental loupes improves the accuracy of aligner attachments and reduces the amount of composite flash after bonding.</p><p><strong>Methods: </strong>Six epoxy resin-printed models (n=14 teeth per model) were created to produce upper arches. All attachments were bonded with G-ænial Posterior composite using the same aligner template, and the protocols differed regarding the use of a dental loupe. The attachments were bonded using the dental magnifying loupe at 2.5X magnification in the \"with loupe\" Group 1 (n=42 teeth), and with the naked eye in the \"without loupe\" Group 2 (n=42 teeth). All bonded attachments were scanned and compared to those of a reference model using Geomagic Control X software to assess accuracy, with a focus on the highest deviations (defects and excesses) between the reference attachment and the results from different bonding protocols. The amounts of flash adhesive were also measured. Independent Samples T-test and Mann-Whitney U test were used. The significance level was set at 0.05.</p><p><strong>Results: </strong>The maximum deviation in excess was 0.46 mm (0.2-1.21) in Group 2, which was higher than the value in Group 1 (0.38 mm, 0.18-0.79) (p=0.048). Regarding the flash adhesive area, the \"without loupe\" group showed a significantly higher value (42.01±10.32 mm²) compared to the \"with loupe\" group (31.79±5.38 mm²) (p<0.001).</p><p><strong>Conclusions: </strong>Using a magnifying dental loupe revealed significantly lower values in both the flash adhesive area around the attachment and the maximum vertical excess on the attachment surface. Clinicians are advised to use dental loupes during bonding attachments.</p>","PeriodicalId":38720,"journal":{"name":"Dental Press Journal of Orthodontics","volume":"31 2","pages":"e2625190"},"PeriodicalIF":0.0,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13185513/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147976213","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}