Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie最新文献

{"title":"Where stress maps fail clinicians: bridging the translational gap in in-silico root resorption models.","authors":"Pantip Chitpitaklert, Schawanya K Rattanapitoon, Nav La, Nathkapach K Rattanapitoon","doi":"10.1007/s00056-025-00636-4","DOIUrl":"10.1007/s00056-025-00636-4","url":null,"abstract":"","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":"334-335"},"PeriodicalIF":1.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147445982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reply to: Where stress maps fail clinicians: bridging the translational gap in in silico root resorption models.","authors":"Alessandra Rodrigues Fonseca Tavares, Marco Aurelio de Carvalho, Priscilla Cardoso Lazari-Carvalho, Lucas Rodrigues de Araújo Estrela, Brunno Santos de Freitas Silva, Altair Antoninha Del Bel Cury, Cyntia Rodrigues Araújo Estrela","doi":"10.1007/s00056-026-00651-z","DOIUrl":"10.1007/s00056-026-00651-z","url":null,"abstract":"","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":"336-337"},"PeriodicalIF":1.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147445956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reply to: 'Letter to editor regarding \"Role of muscle-related genes in sleep bruxism\"'.","authors":"João Armando Brancher, Katia Raquel Weber, Juliana Feltrin-Souza, Marcia Regina Pincerati, Erika Calvano, Graziela De Luca Canto","doi":"10.1007/s00056-026-00665-7","DOIUrl":"https://doi.org/10.1007/s00056-026-00665-7","url":null,"abstract":"","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147789597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Letter to editor regarding \"Role of muscle-related genes in sleep bruxism\".","authors":"Jiayi Chen","doi":"10.1007/s00056-026-00646-w","DOIUrl":"https://doi.org/10.1007/s00056-026-00646-w","url":null,"abstract":"","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147789602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impression precision after hydrogen peroxide sterilization of scanner sleeves.","authors":"Berza Yilmaz, Meric Arslan, Damla Nur Kayasaroglu, Elif Dilara Arslan, Ezgi Sunal Aktürk","doi":"10.1007/s00056-026-00657-7","DOIUrl":"https://doi.org/10.1007/s00056-026-00657-7","url":null,"abstract":"<p><strong>Introduction: </strong>The iTero Element (Align Technologies, San Jose, CA, USA) is a widely used intraoral scanning device, and its protective sleeves for the scanning head are provided for single use. This condition puts the clinical management budget under financial strain and creates a disadvantage for managing environmental waste. The objective of our research was to assess how repeated sterilization of disposable scan head covers with hydrogen peroxide affected the precision of digital impressions.</p><p><strong>Methods: </strong>Intraoral scans were carried out using the iTero Element 5D scanner on 26 patients. Hydrogen peroxide was used to sterilize the sleeves for 45 min at 45 °C. The sterilization procedure was repeated between the second, third, and fourth intraoral scans. Each tooth was given a score based on the color change between the first and fourth scans, which were superimposed using the iTero TimeLapse technology. The OrthoCAD® software (Align Technologies) was also used to measure the intercanine, interpremolar, and intermolar distances, as well as the mesiodistal dimensions of all the teeth between the first molars.</p><p><strong>Results: </strong>No statistically significant difference was found between the mesiodistal dimensions of the teeth and the intercanine, interpremolar, and intermolar distances between the 1st and 4th scans. There was no correlation between the mean differences of the mesiodistal dimensions of the teeth obtained with the 1st and 4th scans and TimeLapse scores.</p><p><strong>Conclusion: </strong>After sterilization with hydrogen peroxide, the repeatability of digital measurements of the protective sleeves of the intraoral scanner was not adversely affected, and their clinical performance was maintained.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147729928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional volumetric comparison of tongue, oral cavity proper, and pharyngeal airway in individuals with different sagittal skeletal patterns : A retrospective CBCT-based study.","authors":"Kevser Di̇nç, Derya İçöz","doi":"10.1007/s00056-026-00655-9","DOIUrl":"https://doi.org/10.1007/s00056-026-00655-9","url":null,"abstract":"<p><strong>Objectives: </strong>The aim of this study is to assess tongue volume (TV), oral cavity proper volume (OCPV), oral cavity volume (OCV), the TV/OCV ratio, pharyngeal airway volume (PAV), nasopharyngeal airway volume (NPAV), and oropharyngeal airway volume (OPAV) in individuals with different sagittal skeletal patterns using cone-beam computed tomography (CBCT), and to explore the interrelationships among these parameters. In addition, this study aimed to enhance the understanding of functional craniofacial anatomy and to support comprehensive planning in both orthodontic and orthognathic treatments.</p><p><strong>Methods: </strong>In all, CBCT images of 165 individuals (88 females, 77 males) were retrospectively selected. The mean age was 21.6 ± 4.5 years (range 17-36 years). The individuals were classified into class I, II, and III based on the sagittal skeletal pattern using the ANB angle. The SNA and SNB angles were also measured. To ensure measurement standardization, all CBCT images were reoriented and resampled to a uniform voxel size of 0.32 mm³ using the \"Resample scalar volume\" module. Measurements of TV, OCPV, OCV, PAV, NPAV, and OPAV were determined using a semi-automatic segmentation method in the 3D Slicer 5.2.2 software (Surgical Planning Lab, Harvard Medical School, Boston, MA, USA), with different thresholds for air (-1000 to -500) and tongue (-500 to +250). Manual corrections and Gaussian smoothing (1 mm) were applied for tongue segmentation. Group comparisons were made with the Kruskal-Wallis test, followed by post hoc pairwise analysis for significant differences. Spearman's correlation analysis was used to examine relationships between parameters, and the Mann-Whitney U test assessed gender differences (p < 0.05).</p><p><strong>Results: </strong>SNA, SNB, TV, OCV, and NPAV values were significantly higher in males than in the females (p < 0.05). SNB, TV, and OCV were higher in the class III group compared to class II and I (p < 0.05). A strong positive correlation was identified between TV and OCV (r: 0.907; p < 0.001; p < 0.05), while a negative correlation was found between TV and OCPV (r: -0.435; p < 0.001; p < 0.05). In class II patients, the TV and TV/OCV ratio correlated positively with NPAV, while in class III patients, the TV/OCV ratio correlated negatively with PAV and OPAV (p < 0.05). The SNB value showed a positive correlation with TV, OCV, PAV, and OPAV (p < 0.05). Additionally, the SNA value exhibited a positive correlation with TV and a negative correlation with OCPV (p < 0.05).</p><p><strong>Conclusion: </strong>The relationships between the tongue, oral cavity, and upper airway differed by gender, skeletal patterns, and the relative positions of the mandible and maxilla.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147693779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the path for standardizing the assessment of masticatory performance : Evaluation of a new test method and development of support software.","authors":"Jérémy Mouchoux, Anja Quast, Hanna Ackermann, Lisa-Marie Mai, Philipp Meyer-Marcotty, Bernhard Wiechens","doi":"10.1007/s00056-026-00653-x","DOIUrl":"https://doi.org/10.1007/s00056-026-00653-x","url":null,"abstract":"<p><strong>Purpose: </strong>Rehabilitation of compromised masticatory function is a primary goal in orthodontics. Therefore, its assessment is essential for monitoring and validating treatment. However, current methods typically focus on a single feature, such as color homogeneity or texture of the test bolus, thereby, limiting their applicability. This study introduces a new open-source software that facilitates easier comparison of mixing ability metrics and evaluates the feasibility of two novel methods that combine color homogeneity, saturation, brightness, and texture.</p><p><strong>Methods: </strong>Bicolor gum samples were chewed 10, 20, and 30 times by 15 participants with class I normocclusion. The boluses were processed using a standardized protocol and photographed under controlled conditions. The state-of-the-art standard deviation of Hue (SDHue) was compared with two new metrics: the Hue-Saturation-Value (HSV) metric, which combines hue, saturation, and brightness, and the Patch Expected Value (PEV) metric, which associates hue and texture. Their ability to discriminate between chewing trials and their intercorrelations were assessed.</p><p><strong>Results: </strong>All three metrics significantly discriminated between the three chewing conditions. The three metrics were correlated with one another across the entire dataset, with the lowest correlation between SDHue and HSV (r = 0.70). SDHue and PEV showed good to strong correlations across the 10×, 20×, and 30× cycle conditions (r = 0.62, 0.92, and 0.76, respectively).</p><p><strong>Conclusion: </strong>This study presents a reproducible methodology and the corresponding software for the objective assessment of masticatory performance. The combination of texture and color homogeneity appears feasible and promising, though further testing with finer mixing resolutions is needed.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147693741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between incisor irregularity and ectopic position of permanent canines : A 3D model-based cross-sectional study.","authors":"Hilal Tarkan, İbrahim Erhan Gelgör, Damla Dalman Şimşek","doi":"10.1007/s00056-026-00656-8","DOIUrl":"https://doi.org/10.1007/s00056-026-00656-8","url":null,"abstract":"<p><strong>Purpose: </strong>The aim of this study was to investigate whether the severity of incisor irregularity is associated with the buccal, palatal/lingual, or normal positions of fully erupted upper or lower permanent canines in three dimensional (3D) digital models.</p><p><strong>Methods: </strong>This cross-sectional study included 288 individuals aged 13.2-15.3 years with skeletal class I malocclusion. Incisor irregularity was assessed using Little's irregularity index (LII), which quantifies the linear displacement of anterior contact points. Canine eruption positions in the upper and lower jaw were classified as normal, buccal or palatal/lingual. All measurements were performed digitally on calibrated 3D intraoral scans. Associations between canine position, irregularity severity, and gender were analyzed using χ² tests. A priori power analysis was conducted (effect size w = 0.51, α = 0.05, power = 0.95).</p><p><strong>Results: </strong>In the maxilla, normally positioned canines were most frequently associated with 0-3 mm of incisor irregularity (59.6%), and this proportion decreased progressively as irregularity increased. Buccal displacement became more common at higher irregularity levels, particularly ≥ 7 mm. In the mandible, 69.8% of normally positioned canines were also observed in the 0-3 mm group, whereas buccal displacement was mainly associated with 4-6 mm (60%) and 7-9 mm (32%) irregularity; lingual displacement was rare. Although the distribution patterns differed between arches, no significant gender-related differences were identified (p > 0.05).</p><p><strong>Conclusion: </strong>The severity of incisor irregularity is significantly associated with ectopic canine eruption, especially when irregularity exceeds 4 mm. Early diagnosis and monitoring of anterior irregularities of more than 4 mm may require specific clinical monitoring and timing of orthodontic assessment.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147635130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the association between skeletal malocclusions and dental maturity in German children and adolescents : A retrospective cross-sectional study.","authors":"Paula Krohn, Christian Kirschneck, Allan Abuabara, Nikolaos Daratsianos, Peter Proff, Cristiano Miranda de Araújo, Gabriela Fonseca de Souza, Flares Baratto-Filho, Svenja Beisel-Memmert, Erika Calvano Küchler","doi":"10.1007/s00056-026-00654-w","DOIUrl":"10.1007/s00056-026-00654-w","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the association between skeletal malocclusions and dental maturity in a German population.</p><p><strong>Methods: </strong>A retrospective cross-sectional study was conducted with 542 patients (274 males, 268 females) aged 6-16 years from Germany. Skeletal sagittal malocclusions were classified as class I, II, or III according to the ANB, and vertical growth patterns of the mandible were determined using the Articulare-Gonion-Menton angle. Dental maturity was estimated using the Demirjian method on panoramic radiographs, and the deviation between dental age and chronological age (delta) was calculated.</p><p><strong>Results: </strong>Among the sample, 43.9% presented skeletal class I, 41.5% class II, and 14.6% class III malocclusions. In our study population, mandibular vertical growth patterns were distributed as 53.5% normodivergent, 43.4% hyperdivergent (vertical), and 3.1% hypodivergent (horizontal). The mean chronological age was 11.6 years, while the mean dental age was 11.7 years, with an average delta of 0.08 (standard deviation = 1.2) years. No significant correlations were found between dental age deviation and the chosen cephalometric variables (p > 0.05). No significant associations were found between dental age deviation and sagittal and vertical malocclusions (p > 0.05).</p><p><strong>Conclusion: </strong>Skeletal malocclusions were not associated with deviations in dental maturity in this German sample. These findings indicate that dental development occurs independently of skeletal discrepancies, supporting the reliability of the Demirjian method across clinical and research contexts.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147492080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Upper arch expansion and spontaneous upper first molar distorotation with Ni-Ti leaf springs and rapid maxillary expander compared to clear aligners : A randomized controlled trial.","authors":"Alessandro Ugolini, Alessandro Bruni, Andrea Abate, Cinzia Maspero, Francesca Silvestrini-Biavati, Valentina Lanteri","doi":"10.1007/s00056-026-00649-7","DOIUrl":"https://doi.org/10.1007/s00056-026-00649-7","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to compare the distorotation of the upper first molars (U6) and the expansion of the upper dental arch achieved using clear aligners (CA), Leaf Expander® (LE; Leone, Sesto Fiorentino, Italy), and rapid maxillary expander (RME), all anchored to the second primary molars.</p><p><strong>Materials and methods: </strong>The research was structured as a superiority randomized controlled trial conducted in two academic medical centers in Italy. Participants included children in growth phase presenting transverse maxillary deficiency with intermolar width less than 30 mm, early mixed dentition with fully erupted upper first molars, and a cervical vertebral maturation stage (CVMS) 1 or 2, without systemic diseases or syndromes. Subjects were randomly assigned to one of the three treatment groups: CA, LE, or RME. The main variable measured was the distorotation of U6, with secondary variables including the width between canines, first molars, and second primary molars.</p><p><strong>Results: </strong>In all, 60 subjects were randomized equally into the three groups. Average treatment time was 8 ± 3 months for the LE group and 9 ± 1 months for the RME group (p = 0.089). Mean treatment time for the CA group was 15 months with a standard deviation of 2 months. A significant difference was observed in the number of clinical visits: 6 ± 2 for LE and 8 ± 1 for RME (p < 0.001). The RME group completed the active treatment phase in 10 ± 2 days, which was notably shorter than the 3.5 ± 0.71 months required for the LE group (p < 0.001). Analysis of variance (ANOVA) revealed statistically significant differences among the groups in terms of U6 distorotation (p < 0.05), whereas no significant differences were found for the expansion of the upper arch. Overall molar distorotation was highest in the LE group (11.73°), surpassing the RME group (6.22°), and was similar to the result observed in the CA group (11.89°).</p><p><strong>Conclusion: </strong>Both CA and maxillary expanders fixed to upper primary molars produced comparable levels of dentoalveolar expansion. The spontaneous distorotation of the U6 obtained with LE was similar to the planned distorotation achieved with CA and significantly higher than that observed with RME.</p>","PeriodicalId":54776,"journal":{"name":"Journal of Orofacial Orthopedics-Fortschritte Der Kieferorthopadie","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147445970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}