Korean Journal of Orthodontics最新文献_第4页

Characterization of facial asymmetry phenotypes in adult patients with skeletal Class III malocclusion using three-dimensional computed tomography and cluster analysis. 使用三维计算机断层扫描和聚类分析成人骨骼III类错颌畸形患者面部不对称表型的特征。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.85

Sang-Woon Ha, Su-Jung Kim, Jin-Young Choi, Seung-Hak Baek

{"title":"Characterization of facial asymmetry phenotypes in adult patients with skeletal Class III malocclusion using three-dimensional computed tomography and cluster analysis.","authors":"Sang-Woon Ha, Su-Jung Kim, Jin-Young Choi, Seung-Hak Baek","doi":"10.4041/kjod.2022.52.2.85","DOIUrl":"https://doi.org/10.4041/kjod.2022.52.2.85","url":null,"abstract":"Objective: To classify facial asymmetry (FA) phenotypes in adult patients with skeletal Class III (C-III) malocclusion.Methods: A total of 120 C-III patients who underwent orthognathic surgery (OGS) and whose three-dimensional computed tomography images were taken one month prior to OGS were evaluated. Thirty hard tissue landmarks were identified. After measurement of 22 variables, including cant (°, mm), shift (mm), and yaw (°) of the maxilla, maxillary dentition (Max-dent), mandibular dentition, mandible, and mandibular border (Man-border) and differences in the frontal ramus angle (FRA, °) and ramus height (RH, mm), K-means cluster analysis was conducted using three variables (cant in the Max-dent [mm] and shift [mm] and yaw [°] in the Man-border). Statistical analyses were conducted to characterize the differences in the FA variables among the clusters.Results: The FA phenotypes were classified into five types: 1) non-asymmetry type (35.8%); 2) maxillary-cant type (14.2%; severe cant of the Max-dent, mild shift of the Man-border); 3) mandibular-shift and yaw type (16.7%; moderate shift and yaw of the Man-border, mild RH-difference); 4) complex type (9.2%; severe cant of the Max-dent, moderate cant, severe shift, and severe yaw of the Man-border, moderate differences in FRA and RH); and 5) maxillary reverse-cant type (24.2%; reverse-cant of the Max-dent). Strategic decompensation by pre-surgical orthodontic treatment and considerations for OGS planning were proposed according to the FA phenotypes.Conclusions: This FA phenotype classification may be an effective tool for differential diagnosis and surgical planning for Class III patients with FA.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"52 2","pages":"85-101"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/bb/31/kjod-52-2-85.PMC8964472.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40317088","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}

引用次数: 4

Use of automated artificial intelligence to predict the need for orthodontic extractions. 使用自动人工智能来预测正畸拔牙的需求。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.102

Alberto Del Real, Octavio Del Real, Sebastian Sardina, Rodrigo Oyonarte

{"title":"Use of automated artificial intelligence to predict the need for orthodontic extractions.","authors":"Alberto Del Real, Octavio Del Real, Sebastian Sardina, Rodrigo Oyonarte","doi":"10.4041/kjod.2022.52.2.102","DOIUrl":"https://doi.org/10.4041/kjod.2022.52.2.102","url":null,"abstract":"Objective: To develop and explore the usefulness of an artificial intelligence system for the prediction of the need for dental extractions during orthodontic treatments based on gender, model variables, and cephalometric records.Methods: The gender, model variables, and radiographic records of 214 patients were obtained from an anonymized data bank containing 314 cases treated by two experienced orthodontists. The data were processed using an automated machine learning software (Auto-WEKA) and used to predict the need for extractions.Results: By generating and comparing several prediction models, an accuracy of 93.9% was achieved for determining whether extraction is required or not based on the model and radiographic data. When only model variables were used, an accuracy of 87.4% was attained, whereas a 72.7% accuracy was achieved if only cephalometric information was used.Conclusions: The use of an automated machine learning system allows the generation of orthodontic extraction prediction models. The accuracy of the optimal extraction prediction models increases with the combination of model and cephalometric data for the analytical process.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"52 2","pages":"102-111"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6d/92/kjod-52-2-102.PMC8964473.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40317089","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}

引用次数: 14

Deep learning for the classification of cervical maturation degree and pubertal growth spurts: A pilot study. 深度学习用于宫颈成熟程度和青春期生长突跃的分类:一项试点研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.112

Hossein Mohammad-Rahimi, Saeed Reza Motamadian, Mohadeseh Nadimi, Sahel Hassanzadeh-Samani, Mohammad A S Minabi, Erfan Mahmoudinia, Victor Y Lee, Mohammad Hossein Rohban

{"title":"Deep learning for the classification of cervical maturation degree and pubertal growth spurts: A pilot study.","authors":"Hossein Mohammad-Rahimi, Saeed Reza Motamadian, Mohadeseh Nadimi, Sahel Hassanzadeh-Samani, Mohammad A S Minabi, Erfan Mahmoudinia, Victor Y Lee, Mohammad Hossein Rohban","doi":"10.4041/kjod.2022.52.2.112","DOIUrl":"https://doi.org/10.4041/kjod.2022.52.2.112","url":null,"abstract":"Objective: This study aimed to present and evaluate a new deep learning model for determining cervical vertebral maturation (CVM) degree and growth spurts by analyzing lateral cephalometric radiographs.Methods: The study sample included 890 cephalograms. The images were classified into six cervical stages independently by two orthodontists. The images were also categorized into three degrees on the basis of the growth spurt: pre-pubertal, growth spurt, and post-pubertal. Subsequently, the samples were fed to a transfer learning model implemented using the Python programming language and PyTorch library. In the last step, the test set of cephalograms was randomly coded and provided to two new orthodontists in order to compare their diagnosis to the artificial intelligence (AI) model's performance using weighted kappa and Cohen's kappa statistical analyses.Results: The model's validation and test accuracy for the six-class CVM diagnosis were 62.63% and 61.62%, respectively. Moreover, the model's validation and test accuracy for the three-class classification were 75.76% and 82.83%, respectively. Furthermore, substantial agreements were observed between the two orthodontists as well as one of them and the AI model.Conclusions: The newly developed AI model had reasonable accuracy in detecting the CVM stage and high reliability in detecting the pubertal stage. However, its accuracy was still less than that of human observers. With further improvements in data quality, this model should be able to provide practical assistance to practicing dentists in the future.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"52 2","pages":"112-122"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/5a/2f/kjod-52-2-112.PMC8964471.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40317090","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}

引用次数: 15

READER'S FORUM. 读者的论坛。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.83

Yoonkyo Oh

引用次数: 0

Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study. 中国女性上颌切牙位置与牙骨和软组织形态的关系:一项回顾性研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.150

Xueman Zhou, Yingcheng Zheng, Zhenzhen Zhang, Zihan Zhang, Lina Wu, Jiaqi Liu, Wenke Yang, Jun Wang

{"title":"Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study.","authors":"Xueman Zhou, Yingcheng Zheng, Zhenzhen Zhang, Zihan Zhang, Lina Wu, Jiaqi Liu, Wenke Yang, Jun Wang","doi":"10.4041/kjod.2022.52.2.150","DOIUrl":"https://doi.org/10.4041/kjod.2022.52.2.150","url":null,"abstract":"Objective: To provide reliable prediction models based on dentoskeletal and soft tissue variables for customizing maxillary incisor positions and to optimize digitalized orthodontic treatment planning.Methods: This study included 244 Chinese women (age, 18-40 years old) with esthetic profiles after orthodontic treatment with fixed appliances (133 in group I: 1° ≤ The angle between the nasion [N]-A point [A] plane and the N-B point [B] plane [ANB] ≤ 4°; 111 in group II: 4° < ANB ≤ 7°). Dental, skeletal, and soft tissue measurements were performed on lateral cephalograms of the participants. Correlation and multiple linear regression analyses were used to determine the influence of dentoskeletal and soft tissue variables on maxillary incisor position.Results: The ideal anteroposterior position of the maxillary incisor varied between sagittal skeletal patterns. The position of the maxillary incisor correlated with the sagittal discrepancy between the maxilla and the mandible (ANB), protrusion of the midface, nasal tip projection, development of the chin, and inclination of both the maxillary and mandibular incisors. Distance from the maxillary central incisor to nasion-pogonion plane predicted using multiple linear regression analysis was accurate and could be a practical measurement in orthodontic treatment planning.Conclusions: Instead of using an average value or norm, orthodontists should customize a patient's ideal maxillary incisor position using dentoskeletal and soft tissue evaluations.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"52 2","pages":"150-160"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/bc/56/kjod-52-2-150.PMC8964466.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40318083","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}

引用次数: 1

Remote digital monitoring during the retention phase of orthodontic treatment: A prospective feasibility study. 正畸治疗保持期的远程数字监控：前瞻性可行性研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2022-03-25 DOI: 10.4041/kjod.2022.52.2.123

Linda Sangalli, Fabio Savoldi, Domenico Dalessandri, Luca Visconti, Francesca Massetti, Stefano Bonetti

{"title":"Remote digital monitoring during the retention phase of orthodontic treatment: A prospective feasibility study.","authors":"Linda Sangalli, Fabio Savoldi, Domenico Dalessandri, Luca Visconti, Francesca Massetti, Stefano Bonetti","doi":"10.4041/kjod.2022.52.2.123","DOIUrl":"10.4041/kjod.2022.52.2.123","url":null,"abstract":"Objective: To evaluate if a remote digital monitoring system added at the end of orthodontic treatment could positively influence the retention phase by reducing the occurrence of misfit of removable appliances, number of emergency appointments (EA), and orthodontic relapse.Methods: Twenty-seven patients who completed active orthodontic treatment were divided into the study and control groups. In addition to the standard chairside follow-up appointments at month 1 (T1), month 3 (T2), month 6 (T3), the study group patients were monitored using Dental Monitoring® with monthly intra-oral scans. Occurrence of misfit of removable retainers, number of EAs, and intercanine width change were recorded for both groups. Differences in EAs and retainer fit were assessed using the chi-square test. Intra-group and inter-group differences in the intercanine width were assessed with Friedman test and Mann-Whitney U test, respectively (α = 0.05).Results: The study group showed a significantly lower occurrence of misfit of removable retainers (p = 0.027) compared to the control group. No significant inter- and intra-group difference was found in the EAs and intercanine width change at each time-point.Conclusions: Integrating remote monitoring systems, such as Dental Monitoring®, to the retention phase of the orthodontic treatment may lower the occurrence of misfit of removable retainers. However, a small sample size and a short observation period limit the strength of this evidence. These preliminary results tentatively suggest that remote monitoring technologies may be beneficial, especially during the COVID-19 pandemic, when the regularity of in-office visits might be disrupted.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"52 2","pages":"123-130"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/8a/d8/kjod-52-2-123.PMC8964474.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40318080","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}

引用次数: 0

Full-arch accuracy of five intraoral scanners: In vivo analysis of trueness and precision. 五种口腔内扫描器的全弓精度:真实度和精度的体内分析。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2021-03-25 DOI: 10.4041/kjod.2021.51.2.95

Miran Kwon, Youngmok Cho, Dong-Wook Kim, MyungSu Kim, Yoon-Ji Kim, Minho Chang

{"title":"Full-arch accuracy of five intraoral scanners: In vivo analysis of trueness and precision.","authors":"Miran Kwon, Youngmok Cho, Dong-Wook Kim, MyungSu Kim, Yoon-Ji Kim, Minho Chang","doi":"10.4041/kjod.2021.51.2.95","DOIUrl":"https://doi.org/10.4041/kjod.2021.51.2.95","url":null,"abstract":"Objective: To evaluate the trueness and precision of full-arch scans acquired using five intraoral scanners and investigate the factors associated with the dimensional accuracy of the intraoral scan data.Methods: Nine adult participants (mean age, 34.3 ± 8.3 years) were recruited. Four zirconium spheres (Ø 6 mm) were bonded to the canines and the molars. Following acquisition of reference scans using an industrial-grade scanner, five intraoral scanners, namely i500, CS3600, Trios 3, iTero, and CEREC Omnicam, were used to scan the arches. Linear distances between the four reference spheres were automatically calculated, and linear mixed model analysis was performed to compare the trueness and precision of the intraoral scan data among the different scanners.Results: The absolute mean trueness and precision values for all intraoral scanners were 76.6 ± 79.3 and 56.6 ± 52.4 μm, respectively. The type of scanner and the measured linear distances had significant effects on the accuracy of the intraoral scan data. With regard to trueness, errors in the intermolar dimension and the distance from the canine to the contralateral molar were greater with Omnicam than with the other scanners. With regard to precision, the error in the linear distance from the canine to the molar in the same quadrant was greater with Omnicam and CS3600 than with the other scanners.Conclusions: The dimensional accuracy of intraoral scan data may differ significantly according to the type of scanner, with the amount of error in terms of trueness being clinically significant.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"51 2","pages":"95-104"},"PeriodicalIF":1.9,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c5/1b/kjod-51-2-95.PMC7940805.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25443850","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}

引用次数: 19

Effect of micro-osteoperforations on external apical root resorption: A randomized controlled trial. 微型骨手术对外根尖吸收的影响:一项随机对照试验。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2021-03-25 DOI: 10.4041/kjod.2021.51.2.86

Azaitun Akma Shahrin, Sarah Haniza Abdul Ghani, Noraina Hafizan Norman

{"title":"Effect of micro-osteoperforations on external apical root resorption: A randomized controlled trial.","authors":"Azaitun Akma Shahrin, Sarah Haniza Abdul Ghani, Noraina Hafizan Norman","doi":"10.4041/kjod.2021.51.2.86","DOIUrl":"https://doi.org/10.4041/kjod.2021.51.2.86","url":null,"abstract":"Objective: This study aimed to investigate the effect of micro-osteoperforations (MOPs) on external apical root resorption (EARR) during the initial orthodontic alignment phase of maxillary anterior crowding.Methods: Thirty patients (25 females, 5 males; mean age, 22.66 ± 3.27 years) who presented with moderate crowding of the upper labial segment and underwent extraction-based fixed appliance treatment were recruited. They were randomly allocated to receive adjunctive therapy with MOPs (n = 15) or treatment with fixed appliances only (control group; n = 15). EARR was measured from long-cone periapical radiographs taken at the start and the sixth month of treatment. A correction factor for the enlargement difference was used to calculate EARR. Data were analyzed with descriptive statistics and repeated-measures analysis of variance.Results: The mean root lengths of 168 teeth were measured and showed no statistically significant difference (p > 0.05) after six months of fixed appliance treatment in the MOP (mean difference [MD] = 0.13 mm; 95% confidence interval [CI] = -0.10-0.35) and control group (MD = 0.14 mm; 95% CI = -0.10-0.37). Most of the roots in the MOP and control groups (42.86% and 52.38%, respectively) showed only mild resorption. Less than 8% of the roots in both groups (7.14% in the MOP group and 4.76% in the control group) showed moderate resorption.Conclusions: Acceleration of orthodontic tooth movement with adjunctive MOPs therapy during the alignment phase does not exacerbate EARR in patients with moderate crowding of the upper labial segment in comparison with controls.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"51 2","pages":"86-94"},"PeriodicalIF":1.9,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/52/6e/kjod-51-2-86.PMC7940811.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25443849","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}

引用次数: 8

Relationship between rotational disc displacement of the temporomandibular joint and the dentoskeletal morphology. 颞下颌关节旋转椎间盘移位与牙骨形态的关系。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2021-03-25 DOI: 10.4041/kjod.2021.51.2.105

So-Hyun Park, Won-Jeong Han, Dong-Hwa Chung, Jung-Sub An, Sug-Joon Ahn

{"title":"Relationship between rotational disc displacement of the temporomandibular joint and the dentoskeletal morphology.","authors":"So-Hyun Park, Won-Jeong Han, Dong-Hwa Chung, Jung-Sub An, Sug-Joon Ahn","doi":"10.4041/kjod.2021.51.2.105","DOIUrl":"https://doi.org/10.4041/kjod.2021.51.2.105","url":null,"abstract":"Objective: The purpose of this study was to evaluate the relationship between rotational disk displacement (DD) of the temporomandibular joint (TMJ) and the dentoskeletal morphology.Methods: Women aged > 17 years were included in this study. Each subject had a primary complaint of malocclusion and underwent routine cephalometric examinations. They were divided into five groups according to the findings on sagittal and coronal magnetic resonance images of their TMJs: bilateral normal disk position, bilateral anterior DD with reduction (ADDR), bilateral rotational DD with reduction (RDDR), bilateral anterior DD without reduction (ADDNR), and bilateral rotational DD without reduction (RDDNR). Twenty-three cephalometric variables were analyzed, and the Kruskal-Wallis test was used to evaluate differences in the dentoskeletal morphology among the five groups.Results: Patients with TMJ DD exhibited a hyperdivergent pattern with a retrognathic mandible, unlike those with a normal disk position. These specific skeletal characteristics were more severe in patients exhibiting DD without reduction than in those with reduction, regardless of the presence of rotational DD. Rotational DD significantly influenced horizontal and vertical skeletal patterns only in the stage of DD with reduction, and the mandible exhibited a more backward position and rotation in patients with RDDR than in those with ADDR. However, there were no significant dentoskeletal differences between ADDNR and RDDNR.Conclusions: The results of this study suggest that rotational DD of TMJ plays an important role in the dentoskeletal morphology, particularly in patients showing DD with reduction.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"51 2","pages":"105-114"},"PeriodicalIF":1.9,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a7/3c/kjod-51-2-105.PMC7940809.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25443851","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}

引用次数: 5

Differences in mandibular condyle and glenoid fossa morphology in relation to vertical and sagittal skeletal patterns: A cone-beam computed tomography study. 下颌髁突和盂窝形态与垂直和矢状面骨骼模式的差异:锥束计算机断层扫描研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2021-03-25 DOI: 10.4041/kjod.2021.51.2.126

Kyoung Jin Noh, Hyoung-Seon Baik, Sang-Sun Han, Woowon Jang, Yoon Jeong Choi

{"title":"Differences in mandibular condyle and glenoid fossa morphology in relation to vertical and sagittal skeletal patterns: A cone-beam computed tomography study.","authors":"Kyoung Jin Noh, Hyoung-Seon Baik, Sang-Sun Han, Woowon Jang, Yoon Jeong Choi","doi":"10.4041/kjod.2021.51.2.126","DOIUrl":"https://doi.org/10.4041/kjod.2021.51.2.126","url":null,"abstract":"Objective: This study aimed to evaluate the following null hypothesis: there are no differences in the morphology of the temporomandibular joint (TMJ) structures in relation to vertical and sagittal cephalometric patterns.Methods: This retrospective study was performed with 131 participants showing no TMJ symptoms. The participants were divided into Class I, II, and III groups on the basis of their sagittal cephalometric relationships and into hyperdivergent, normodivergent, and hypodivergent groups on the basis of their vertical cephalometric relationships. The following measurements were performed using cone-beam computed tomography images and compared among the groups: condylar volume, condylar size (width, length, and height), fossa size (length and height), and condyle-to-fossa joint spaces at the anterior, superior, and posterior condylar poles.Results: The null hypothesis was rejected. The Class III group showed larger values for condylar width, condylar height, and fossa height than the Class II group (p < 0.05). Condylar volume and superior joint space in the hyperdivergent group were significantly smaller than those in the other two vertical groups (p < 0.001), whereas fossa length and height were significantly larger in the hyperdivergent group than in the other groups (p < 0.01). The hypodivergent group showed a greater condylar width than the hyperdivergent group (p < 0.01). The sagittal and vertical cephalometric patterns showed statistically significant interactions for fossa length and height.Conclusions: TMJ morphology differed across diverse skeletal cephalometric patterns. The fossa length and height were affected by the interactions of the vertical and sagittal skeletal patterns.","PeriodicalId":49934,"journal":{"name":"Korean Journal of Orthodontics","volume":"51 2","pages":"126-134"},"PeriodicalIF":1.9,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/04/86/kjod-51-2-126.PMC7940806.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25443853","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}

引用次数: 9