Korean Journal of Orthodontics最新文献

{"title":"READER'S FORUM.","authors":"Jiayi Chen","doi":"10.4041/kjod56.0002RF","DOIUrl":"10.4041/kjod56.0002RF","url":null,"abstract":"","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"89-91"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021315/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of changes in oral and dental health and deleterious oral habits after adenoidectomy or adenotonsillectomy in children.","authors":"Eda Arat Maden, Gizem Yoğurucu Değerli, Senem Kurt Dizdar, Suat Turgut","doi":"10.4041/kjod25.182","DOIUrl":"10.4041/kjod25.182","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to evaluate changes in oral health status and related oral habits in children undergoing adenoidectomy or adenotonsillectomy, focusing on dental indices and mouth breathing-associated symptoms.</p><p><strong>Methods: </strong>This prospective observational study included 52 children (mean age: 7.4 ± 2.1 years) who underwent adenoidectomy or adenotonsillectomy. Clinical evaluations included decayed, missing, and filled teeth for primary dentition/decayed, missing, and filled teeth for permanent dentition (dmft/DMFT) scores, plaque index (Silness and Löe), gingival index (Löe and Silness), and unstimulated salivary flow rate. Parents completed structured questionnaires assessing their children's medical and dental history, oral health-related behaviors, and symptoms. Oral health-related quality of life was evaluated using the Early Childhood Oral Health Impact Scale.</p><p><strong>Results: </strong>Statistically significant improvements were found in salivary flow rate (from 0.43 ± 0.21 mL/min to 0.75 ± 0.19 mL/min), plaque index (1.58 ± 0.48 to 1.06 ± 0.33), and gingival index (1.28 ± 0.55 to 0.70 ± 0.39) (all <i>P</i> = 0.001). Several mouth breathing-related symptoms, such as snoring, dry mouth, daytime sleepiness, and halitosis, also showed a significant postoperative reduction (<i>P</i> < 0.05).</p><p><strong>Conclusions: </strong>Adenoidectomy or adenotonsillectomy significantly improved periodontal parameters and reduced mouth breathing-associated symptoms in children. These findings highlight the importance of interdisciplinary management involving otolaryngologists, pediatric dentists, and orthodontists.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"127-141"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021317/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy of clear functional orthodontic appliances versus traditional functional appliances in the treatment of Class II malocclusion: A systematic review and meta-analysis.","authors":"Byung-Joo Sohn, Yoo-Kyung Han, Na Jin Kim, Jun-Beom Park, Sung-Seo Mo","doi":"10.4041/kjod25.197","DOIUrl":"10.4041/kjod25.197","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to conduct a comprehensive meta-analysis of the cephalometric and dental repositioning outcomes in patients with skeletal Class II malocclusion treated with either traditional functional appliances or clear aligners with mandibular advancement.</p><p><strong>Methods: </strong>A systematic literature search was performed using four major electronic databases: PubMed, Embase, the Cochrane Library, and Web of Science. Two independent reviewers selected studies based on the Population, Intervention, Comparison, Outcome, and Study design (PICOS) framework. Eligible studies were screened according to the predefined inclusion and exclusion criteria, and relevant data were extracted.</p><p><strong>Results: </strong>After a multi-stage screening and selection process, five studies were included. Skeletal and dental parameters were analyzed to compare the treatment outcomes. For the SNA angle, the standardized mean difference (SMD) was 0.54 (95% confidence interval [CI]: -0.28 to 1.36; <i>P</i> = 0.1943); for the SNB angle, the SMD was 0.29 (95% CI: -0.34 to 0.93; <i>P</i> = 0.3607); and for the ANB angle, the SMD was 0.33 (95% CI: -0.43 to 1.09; <i>P</i> = 0.3970). The two treatment modalities showed no significant difference in the change in maxillary incisor angulation. Similarly, changes in the mandibular incisor angle and mandibular length did not differ significantly between the two treatment modalities.</p><p><strong>Conclusions: </strong>Treatment outcomes showed no clinically significant differences between clear aligners with mandibular advancement and traditional functional appliances. This meta-analysis suggests that clear aligners with mandibular advancement may serve as alternatives for the treatment of skeletal Class II malocclusion, although high-quality randomized controlled trials are needed to confirm these preliminary findings.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"167-180"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021320/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can wear time, material composition, and manufacturing processes affect microplastic release from clear orthodontic aligners? A multidisciplinary <i>in vitro</i> study.","authors":"Giulia Orilisi, Flavia Vitiello, Valentina Notarstefano, Chiara Santoni, Vincenzo Tosco, Sabina Saccomanno, Giuseppe Marzo, Elisabetta Giorgini, Giovanna Orsini, Vincenzo Quinzi","doi":"10.4041/kjod25.296","DOIUrl":"10.4041/kjod25.296","url":null,"abstract":"<p><strong>Objective: </strong>Plastics are widely used, including in medical applications. In dentistry, clear aligners (CAs) offer an alternative to fixed appliances, but their potential microplastics (MP) release raises health concerns. This study aims to investigate the detachment of MPs from CAs by analyzing the correlations between wearing time, manufacturing methods, and material composition.</p><p><strong>Methods: </strong>The following CAs were tested: Alleo (AL), F22 Aligner (F22), FlexiLigner (FL), Graphy (GP), Invisalign (INV), KeySplint (KS), Lineo (LIN), LuxCreo (LC), Spark (SP), and SureSmile (SS). One pair of CAs per group was immersed in artificial saliva, and the solution was stirred for 5 hours per day for 7 (T1) or 14 (T2) days to simulate mechanical friction. Saliva samples were subsequently vacuum-filtered through 1.6-μm pore-size membranes. Attenuated total reflectance-Fourier transform infrared spectroscopy was used to characterize the CA materials, and Raman microspectroscopy and scanning electron microscopy were used to assess the chemical composition, number, size, and shape of the MPs. The experiment was conducted in triplicate.</p><p><strong>Results: </strong>The release of MPs increased significantly from T1 to T2 (<i>P</i> < 0.05), especially those with a diameter < 5 μm. The mean size of the MPs did not significantly differ at either time point. MP release was associated with material composition at T1 and T2 (<i>P</i> < 0.0001). No significant correlation was observed with the manufacturing process, although GP, KS, and LC, which are three-dimensionally printed (3D-printed) CAs, released more uniform and spherical MPs.</p><p><strong>Conclusions: </strong>Replacing CAs after 7 days may help limit MP release, particularly smaller fragments; however, the clinical significance of this finding remains unclear and requires further in vivo investigation.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"92-103"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021316/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the biomechanical properties of CAD/CAM individualized lingual retainers: An <i>in vitro</i> study.","authors":"Cita Nottmeier, Talisa Schwieder, Gina Marie Georgi, Carmen Schmid-Hermann, Bärbel Kahl-Nieke, Daniel Seiler, Christoph Bourauel, Till Koehne","doi":"10.4041/kjod25.114","DOIUrl":"10.4041/kjod25.114","url":null,"abstract":"<p><strong>Objective: </strong>This study examined the biomechanical properties of computer-aided design/computer-aided manufacturing (CAD/CAM) retainers made of titanium and nickel-titanium (NiTi).</p><p><strong>Methods: </strong>Four retainer types were tested: (1) twisted steel, (2) NiTi, (3) cut titanium, and (4) printed titanium. Longitudinal wires were manufactured (2-4) and subjected to a three-point bending test (3PBT). In a biomechanical bending test (BMT), retainers were designed from patient scans and applied to models in an Orthodontic Measurement and Simulation System, with the maxillary central incisor and mandibular central incisor loaded with deflections of ±0.2 mm and rotation of ±1°.</p><p><strong>Results: </strong>The 3PBT showed that NiTi wires exhibited a characteristic hysteresis loop, whereas the cut and printed titanium wires had different flow and yield strengths. The BMT forces during intrusive and extrusive movements were measured, and the findings revealed that in the maxilla, all CAD/CAM materials showed significant differences from the twisted steel, with NiTi differing from the cut and printed titanium. In the mandible, the forces were generally higher, with significant differences observed at 0.1-mm extrusion and 0.2-mm deflection. In addition, significant differences were observed in the mesial and distal deflections, particularly in the mandible, where the cut titanium generated the lowest forces. Twisted steel exhibited the lowest torque, whereas cut titanium exhibited the highest torque.</p><p><strong>Conclusions: </strong>CAD/CAM retainers differ significantly from conventional twisted steel retainers, with notable differences between NiTi and titanium retainers, especially in the maxilla. However, these differences may be negligible in the mandible due to the shorter interdental distance.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"104-116"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021321/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary changes in patients with clear aligners compared with fixed orthodontic appliances during the early stages of orthodontic treatment: A systematic review.","authors":"Robert Iacobelli, Diana Tucker De Sanctis, Luay Jabr, Dimitris Michelogiannakis, Linda Sangalli","doi":"10.4041/kjod25.271","DOIUrl":"10.4041/kjod25.271","url":null,"abstract":"<p><strong>Objective: </strong>This systematic review evaluated dietary changes during the first 6 months of orthodontic treatment between multibracket fixed appliances and clear aligners.</p><p><strong>Methods: </strong>Five databases (PubMed, Web of Science, Cochrane's Database of Systematic Reviews, EMBASE, Scopus) were searched through January 2025 for longitudinal studies on healthy participants undergoing non-extractive orthodontic treatment with multibracket fixed appliances or clear aligners, assessing dietary changes. Data on diet change were extracted at baseline, 24 hours, 1 week, 2 weeks, 1-2 months, and 3-6 months, and descriptively compared with pain outcomes. Quality assessment was performed using Risk-of-Bias-2.0 and ROBINS-I; overall certainty of evidence was evaluated with GRADE.</p><p><strong>Results: </strong>The search retrieved 180 studies; 56 were screened, and 22 full-text articles were reviewed. Nine studies (671 participants, 58.9% females) were included. Despite no significant baseline differences between groups, 24 hours after appliance placement, all studies indicated significantly greater diet-related limitations in the multibracket group than in the aligner group, with differences of 0.1-0.9 points on a 0-10 scale. Trends persisted at 1 week (differences 0.7-1.8 points), 2 weeks (0.8-1.9 points), 1-2 months (0.1-2.0 points), and 3-6 months (0.8-3.0 points). Across timepoints, comparisons of pain intensity and dietary changes did not reveal consistent patterns.</p><p><strong>Conclusions: </strong>During the first 6 months, multibracket appliances may affect diet more negatively than clear aligners and this pattern does not seem to be explained by differences in pain. Given the low-to-moderate certainty of evidence and indirect diet assessment using items from broader oral health-related quality of life instruments, these results should be interpreted with caution.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 2","pages":"142-166"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021319/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tricortical versus bicortical anchorage in a double-screw tandem skeletal expander and a single-screw maxillary anchorage rapid palatal expander: A finite element analysis.","authors":"Luca Brucculeri, Federica Pellitteri, Alfredo Salvatore Monterossi, Emanuele Paoletto, Giuliano Maino, Luca Lombardo","doi":"10.4041/kjod23.270","DOIUrl":"10.4041/kjod23.270","url":null,"abstract":"<p><strong>Objective: </strong>This study aims to employ finite element method (FEM) analysis to compare the differences between bicortical and tricortical anchorage of the posterior miniscrews in a single-screw miniscrew-assisted rapid palatal expansion (MARPE) and a double-screw tandem skeletal expander (TSE) under open and closed suture conditions.</p><p><strong>Methods: </strong>A cone beam computed tomography of the human skull of a 21.5-year-old female was utilized as a model for creating a FEM analysis. Simulations involved the insertion of four palatal miniscrews: two anterior ones with bicortical anchorage and two posterior ones (one with bicortical and another with tricortical anchorage), under open and closed suture conditions in a single-screw MARPE and double-screw TSE, resulting in a total of eight different simulation configurations. Evaluation parameters include total deformation (mm), Von Mises stress (MPa), and strain for each miniscrew body.</p><p><strong>Results: </strong>Tricortical anchorage of the posterior miniscrews provides greater anchorage, higher stress, and deformation on the anterior miniscrews in single-screw MARPE. Tricortical anchorage combined with a double-screw TSE promotes a more even distribution of force and stress on miniscrews under open suture conditions, leading to a parallel midpalatal suture opening along its entire length and height.</p><p><strong>Conclusions: </strong>FEM analysis revealed favorable midpalatal suture opening with equal force distribution and less stress when posterior tricortical anchorage in conjunction with double-screw TSE is applied.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":" ","pages":"117-126"},"PeriodicalIF":2.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13021318/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141762456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incisor extrusion with or without molar intrusion for the correction of anterior open bite with clear aligners and comparison of outcomes with fixed appliances incorporating temporary anchorage devices: A systematic review and meta-analysis.","authors":"Thanit Charoenrat, Phuntin Uengkajornkul, Chidsanu Changsiripun","doi":"10.4041/kjod25.064","DOIUrl":"10.4041/kjod25.064","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed (1) to compare the effects of clear aligner treatment (CAT) and fixed appliances incorporating temporary anchorage devices (FATADs) on overbite and the vertical position of anterior and posterior teeth in open bite patients; (2) to assess the impact of CAT on increasing overbite and vertical tooth movement; and (3) to evaluate post-treatment stability.</p><p><strong>Methods: </strong>Electronic searches of Medline, Scopus, Cochrane Central, Embase, and the Virtual Health Library network portal, and manual searches were conducted up to April 2025. Human studies evaluating CAT for open bite correction and reporting pre- and post-treatment overbite (primary outcome) and vertical incisor and molar positions (secondary outcomes), with or without comparison to FATADs, were included. Study quality was assessed using design-appropriate tools.</p><p><strong>Results: </strong>Of 1,610 identified studies, 10 met the inclusion criteria (four non-randomized controlled trials and six before-and-after studies). CAT increased overbite by 2.77 mm, mainly through upper (0.87 mm) and lower (1.06 mm) incisor extrusion, without significant molar intrusion. Compared with CAT, FATADs achieved greater overbite correction and upper molar intrusion (1.64 mm and 1.88 mm, respectively). CAT showed greater lower incisor extrusion (2.35 mm), with no significant difference in upper incisor position. During retention, CAT maintained stability, with no significant changes in overbite (0.02 mm) or vertical tooth positions.</p><p><strong>Conclusions: </strong>CAT effectively increases overbite mainly through incisor extrusion but is less effective than FATADs for open bite correction via molar intrusion. The vertical position of the teeth remained stable during the retention period.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 1","pages":"69-86"},"PeriodicalIF":2.3,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12851824/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dental Crowding Categorization Network (DCC-Net): Explainable deep learning system for automatic categorization of dental crowding on intraoral photographs.","authors":"Raokaijuan Wang, Yangjie Deng, Fangyuan Cheng, Jiayu Zhang, Chengmin Fan, Ruijie Fu, Juan Li, Fulin Jiang","doi":"10.4041/kjod25.078","DOIUrl":"10.4041/kjod25.078","url":null,"abstract":"<p><strong>Objective: </strong>Since categorization of dental crowding is a crucial parameter in orthodontic diagnosis and tooth-extraction decisions, we aimed to develop an automatic system to categorize crowding levels on intraoral photographs without space analysis.</p><p><strong>Methods: </strong>The Dental Crowding Categorization Network (DCC-Net), consisting of segmentation, extraction, and categorization modules, was proposed and optimized by extracting regions of interest and crown centroids. A multicenter dataset including 1,351 maxillary and 1,253 mandibular intraoral photographs was divided in an 8:2 ratio for model training and internal testing, and an additional 100 photographs were collected for external testing. The ground truth was obtained through measurements by experienced orthodontists using intraoral scanning data. The accuracy, precision, recall, and F1-score of the categorization module were calculated, and heatmaps were obtained for model interpretation. Furthermore, a clinical evaluation was performed to compare the diagnostic accuracy of junior orthodontists with and without the assistance of DCC-Net.</p><p><strong>Results: </strong>For the maxilla, the categorization accuracy, precision, recall, and F1-score were 0.7232, 0.7447, 0.6793, and 0.6962, respectively, whereas the corresponding values for categorization in the mandible were 0.7352, 0.7506, 0.6723, and 0.7019, respectively. The heatmaps indicated that DCC-Net could identify the dental arches and regions showing malocclusion. In the clinical evaluation, the diagnostic accuracy of junior orthodontists improved with DCC-Net's assistance, increasing by 9.18% for the maxilla and 12.75% for the mandible.</p><p><strong>Conclusions: </strong>DCC-Net achieved accurate categorization of dental crowding on intraoral photographs. Its rapid predictions may offer insights for guiding tooth extraction in orthodontic treatment, providing valuable reference data for inexperienced orthodontists and improving doctor-patient communication.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 1","pages":"57-68"},"PeriodicalIF":2.3,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12849715/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of skeletal and dentoalveolar effects of tooth-and-bone-borne and bone-borne miniscrew-assisted rapid palatal expansion in young adults.","authors":"Seungmin Ryu, Eun-Hack Andrew Choi, Jing Liu, Sung-Hwan Choi, Hyung-Seog Yu, Jung-Yul Cha","doi":"10.4041/kjod25.055","DOIUrl":"10.4041/kjod25.055","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the frequency of midpalatal suture separation with tooth-and-bone-borne (TBB) and bone-borne (BB) miniscrew-assisted rapid palatal expansion and to compare their skeletal and dentoalveolar effects in young adults.</p><p><strong>Methods: </strong>This retrospective study included 34 patients (14 male and 20 female) who underwent palatal expansion divided into two groups: TBB group (n = 15; mean age, 22.3 years) and BB group (n = 19; mean age, 21.7 years). Cone-beam computed tomography images were acquired before treatment (T0) and after a 3-month consolidation period (T1). The primary outcomes were the frequency of midpalatal suture separation (%) and skeletal and dentoalveolar changes after expansion. The secondary outcome was the dental expansion ratio (%).</p><p><strong>Results: </strong>Midpalatal suture separation was observed in 73.3% (11/15) and 73.7% (14/19) of patients in the TBB and BB groups, respectively. Both groups showed comparable increases in skeletal measurements. However, the TBB group demonstrated greater dentoalveolar expansion than the BB group. In addition, the TBB group exhibited greater dental inclination and a greater reduction in the buccal alveolar bone thickness than the BB group. Furthermore, the dental expansion ratio was significantly higher in the TBB group (65.0%) than in the BB group (35.7%, <i>P</i> < 0.001).</p><p><strong>Conclusions: </strong>Both TBB and BB achieved successful midpalatal suture separation in young adults, with success rates of 73.3% and 73.7%, respectively. Moreover, skeletal expansion outcomes were comparable between the groups. However, dental expansion was greater in the TBB group than in the BB group, with a greater increase in dental inclination.</p>","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"56 1","pages":"11-20"},"PeriodicalIF":2.3,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12849718/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146031498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}