Korean Journal of Orthodontics最新文献_第8页

Association between Taql polymorphism of vitamin D receptor gene and vertical growth of the mandible: A cross-sectional study. 维生素D受体基因Taql多态性与下颌骨垂直生长的相关性：一项横断面研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-09-25 DOI: 10.4041/kjod23.129

Baris Can Telatar, Gul Yildiz Telatar, Faruk Saydam

{"title":"Association between Taql polymorphism of vitamin D receptor gene and vertical growth of the mandible: A cross-sectional study.","authors":"Baris Can Telatar, Gul Yildiz Telatar, Faruk Saydam","doi":"10.4041/kjod23.129","DOIUrl":"https://doi.org/10.4041/kjod23.129","url":null,"abstract":"Objective: To determine whether the gonial angle on digital panoramic radiographs is associated with vitamin D receptor (VDR) Taql polymorphism.Methods: Genomic DNA samples were collected from the buccal mucosa of patients aged 26-43 years. TaqMan assay for single nucleotide polymorphism genotyping was used to detect the genotype of Taql polymorphism. The gonial angle was measured bilaterally on panoramic radiography. The normal gonial angle was fixed as 121.8°, and it represented the cutoff value for the high gonial angle (HGA) and low gonial angle (LGA) groups. Various genetic models were analyzed, namely dominant (homozygous [AA] vs. heterozygous [AG] + polymorphic [GG]), recessive (AA + AG vs. GG), and additive (AA + GG vs. AG), using the chi-squared test.Results: The reliability of the gonial angle measurement was analyzed using a random sample (26%) of the tests, with the intra-examiner correlation showing an intra-class correlation coefficient of 0.99. The frequencies of the AA, AG, and GG genotypes of rs731236 polymorphism were 40.5%, 41.9%, and 17.6% in the HGA group and 21.8%, 51.0%, and 27.2% in the LGA group, respectively (P = 0.042). A statistically significant difference was observed in the allele frequencies between the two groups (P = 0.011). Moreover, a significant correlation was observed in the dominant genetic model.Conclusions: Taql polymorphism in the VDR gene plays a critical role in the vertical growth of the mandible and decreased gonial angle.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 5","pages":"336-342"},"PeriodicalIF":1.9,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/24/11/kjod-53-5-336.PMC10547590.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41151127","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

Effect of 125 Hz and 150 Hz vibrational frequency electric toothbrushes on the rate of orthodontic tooth movement and prostaglandin E2 levels. 125Hz和150Hz振动频率电动牙刷对正畸牙齿移动速率和前列腺素E2水平的影响。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-09-25 DOI: 10.4041/kjod23.076

Anadha N Gujar, Prashantha Govinakovi Shivamurthy

{"title":"Effect of 125 Hz and 150 Hz vibrational frequency electric toothbrushes on the rate of orthodontic tooth movement and prostaglandin E2 levels.","authors":"Anadha N Gujar, Prashantha Govinakovi Shivamurthy","doi":"10.4041/kjod23.076","DOIUrl":"https://doi.org/10.4041/kjod23.076","url":null,"abstract":"Objective: To evaluate the effects of an electric toothbrush with vibrational frequencies of 125 Hz and 150 Hz on the orthodontic tooth movement (OTM) rate and the production of prostaglandin E2 (PGE2).Methods: Out of thirty patients (aged 18-25 years; 16 females and 14 males), ten patients each formed Group A and B, who used electric toothbrushes with 125 Hz and 150 Hz vibrations, respectively. The remaining ten patients (Group C) served as the control group and did not use electric toothbrushes. The rate of OTM and levels of PGE2 using microcapillary pipettes were calculated before the start of retraction (T0), on the 30th day (T1), on the 60th day (T2), and on the 90th day (T3) from the start of retraction in all the groups.Results: There was a statistically significant difference in the mean OTM values and PGE2 levels in all three groups at different time intervals, with the maximum difference seen in Group B compared to Group A and least in Group C at T1, T2 and T3.Conclusions: The rate of OTM and levels of PGE2 were highest in patients who used an electric toothbrush with 150 Hz mechanical vibration compared to those who used an electric toothbrush with 125 Hz mechanical vibration and least in patients who did not use an electric toothbrush. Mechanical vibration led to an increase in the PGE2 levels and accelerated the OTM.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 5","pages":"307-316"},"PeriodicalIF":1.9,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a1/ce/kjod-53-5-307.PMC10547591.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41180438","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

Pattern of lip retraction according to the presence of lip incompetence in patients with Class II malocclusion. ⅱ类错颌患者唇部功能不全时的唇回缩模式。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod22.260

Mei Ling Fang, Sung-Hwan Choi, Yoon Jeong Choi, Kee-Joon Lee

{"title":"Pattern of lip retraction according to the presence of lip incompetence in patients with Class II malocclusion.","authors":"Mei Ling Fang, Sung-Hwan Choi, Yoon Jeong Choi, Kee-Joon Lee","doi":"10.4041/kjod22.260","DOIUrl":"https://doi.org/10.4041/kjod22.260","url":null,"abstract":"Objective: The aim of this retrospective study was to compare changes in hard tissue and soft tissue after the four first premolars were extracted with anterior teeth retraction according to the presence or absence of lip incompetence.Methods: Patients who underwent the four first premolars were extracted with anterior teeth retraction were divided into competent (n = 20) and incompetent lip (n = 20) groups. Cephalometric measurements for hard tissue and soft tissue changes were performed pre-treatment and post-treatment.Results: In the competent group, the upper and lower lips retreated by 2.88 mm and 4.28 mm, respectively, and in the incompetent group by 4.13 mm and 5.57 mm, respectively; the differences between the two groups were significant (p < 0.05). A strong positive correlation between retraction of the upper lip and upper incisors was observed in both groups (p < 0.05), whereas a correlation between retraction of the lower lip and lower incisors was only found in the incompetent group. A simple linear regression analysis showed that the pattern of lip retraction following the retraction of the anterior teeth was more predictable in the incompetent group than in the competent group.Conclusions: These findings suggest that the initial evaluation of lip incompetence in patients with skeletal Class II is essential for the accurate prediction of the soft tissue changes following retraction of the anterior teeth in premolar extraction treatment. Therefore, sufficient explanation should be provided during patient consultations.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"276-285"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/11/31/kjod-53-4-276.PMC10387428.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9918918","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

Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes. 骨ⅲ类面部不对称患者中矢状面锥形束ct标志位置的差异。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod23.015

Hyung-Kyu Noh, Ho-Jin Kim, Hyo-Sang Park

{"title":"Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes.","authors":"Hyung-Kyu Noh, Ho-Jin Kim, Hyo-Sang Park","doi":"10.4041/kjod23.015","DOIUrl":"https://doi.org/10.4041/kjod23.015","url":null,"abstract":"Objective: This study aimed to clarify differences in the positions of cone-beam computed tomography (CBCT) landmarks according to different midsagittal planes (MSPs) in patients with skeletal Class III facial asymmetry.Methods: Pre-treatment CBCT data from 60 patients with skeletal Class III were used. The patients were classified into symmetric (menton deviations of < 2 mm) or asymmetric (menton deviations of > 4 mm) groups. Six MSPs were established based on previous studies, and three-dimensional analyses were performed for the planes in both the groups. The measurement outcomes were compared statistically.Results: A statistically significant interaction (p < 0.01) was observed between MSPs and facial asymmetry. No significant differences were observed among MSPs in the symmetric group. However, significant differences in linear measurements were identified among MSPs in the asymmetric group. Specifically, the upper facial MSP revealed both maxillary and mandibular transverse asymmetries. On the other hand, anterior nasal spine (ANS)-associated MSP could not identify maxillary asymmetry. Furthermore, the menton deviation was approximately 3 mm lower when estimated using the ANS-associated MSP than that using upper facial MSP.Conclusions: The choice of MSP can significantly affect treatment outcomes while diagnosing patients with asymmetry. Therefore, care should be taken when selecting MSP in clinical practice.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"219-231"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/44/a1/kjod-53-4-219.PMC10387431.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9972029","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

A novel method for testing accuracy of bite registration using intraoral scanners. 一种利用口腔内扫描仪检测咬合配准精度的新方法。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod22.199

Lydia Kakali, Demetrios J Halazonetis

{"title":"A novel method for testing accuracy of bite registration using intraoral scanners.","authors":"Lydia Kakali, Demetrios J Halazonetis","doi":"10.4041/kjod22.199","DOIUrl":"https://doi.org/10.4041/kjod22.199","url":null,"abstract":"Objective: The evidence on the accuracy of bite registration using intraoral scanners is sparse. This study aimed to develop a new method for evaluating bite registration accuracy using intraoral scanners.Methods: Two different types of models were used; 10 stone models and 10 with acrylic resin teeth. A triangular frame with cylindrical posts at each apex (one anterior and two posteriors) was digitally designed and manufactured using three-dimensional (3D) printing. Such a structure was fitted in the lingual space of each maxillary and mandibular model so that, in occlusion, the posts would contact their opposing counterparts, enforcing a small interocclusal gap between the two arches. This ensured no tooth interference and full contact between opposing posts. Bite registration accuracy was evaluated by measuring the distance between opposing posts, with small values indicating high-accuracy. Three intraoral scanners were used: Medit i500, Primescan, and Trios 4. Viewbox software was used to measure the distance between opposing posts and compute roll and pitch.Results: The average maximum error in interocclusal registration exceeded 50 μm. Roll and pitch orientation errors ranged above 0.1 degrees, implying an additional interocclusal error of around 40 μm or more. The models with acrylic teeth exhibited higher errors.Conclusions: A method that avoids the need for reference hardware and the imprecision of locating reference points on tooth surfaces, and offers simplicity in the assessment of bite registration with an intraoral scanner, was developed. These results suggest that intraoral scanners may exhibit clinically significant errors in reproducing the interocclusal relationships.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"254-263"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/e8/38/kjod-53-4-254.PMC10387426.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9918909","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

Zygomaticotemporal suture maturation evaluation in Chinese population using cone-beam computed tomography images. 用锥形束计算机断层成像评价中国人颧颞缝合线成熟度。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod23.020

Yifan Li, Ruomei Li, Jiajun Shi, Yuhua Shan, Zhenqi Chen

{"title":"Zygomaticotemporal suture maturation evaluation in Chinese population using cone-beam computed tomography images.","authors":"Yifan Li, Ruomei Li, Jiajun Shi, Yuhua Shan, Zhenqi Chen","doi":"10.4041/kjod23.020","DOIUrl":"https://doi.org/10.4041/kjod23.020","url":null,"abstract":"Objective: This study aimed to evaluate the zygomaticotemporal suture (ZTS) maturation, analyze the age distribution patterns of ZTS maturation stages, and investigate the relationship between ZTS and cervical vertebral maturation (CVM).Methods: A total of 261 patients who underwent cone-beam computed tomography (112 males, mean age, 13.1 ± 3.3 years; 149 females, mean age, 13.7 ± 3.1 years) were examined to evaluate the ZTS stages. The ZTS stages were defined based on a modified method from previous studies on zygomaticomaxillary sutures. Differences between groups and correlations between indicators were analyzed using the Spearman correlation test, intraclass coefficient of correlation (ICC), one-way analysis of variance and rank sum test. Statistical significance was set at p < 0.05. The diagnostic value of CVM stages in identifying ZTS maturation stages was evaluated using positive likelihood ratios (LRs).Results: A positive relationship was found between the ZTS and CVM stage (r = 0.747, ICC = 0.621, p < 0.01) and between the ZTS stage and chronological age (r = 0.727, ICC = 0.330, p < 0.01). Positive LRs > 10 were found for several cervical stages (CSs), including CS1 and CS2 for the diagnosis of stage B, CS1 to CS3 for the diagnosis of stages B and C, and CS6 for the diagnosis of stages D and E.Conclusions: The ZTS maturation stage may be more relevant to the CVM stage than to the chronological age. The CVM stages can be good indicators for clinical decisions regarding maxillary protraction, except for CS4 and CS5.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"232-240"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d0/4c/kjod-53-4-232.PMC10387427.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10293154","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

Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion. 不同类型微种植体辅助腭快速扩张对骨骼和牙槽的影响。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod23.036

Hyeong-Yoon Choi, Sang-Min Lee, Jin-Woo Lee, Dong-Hwa Chung, Mo-Hyeon Lee

{"title":"Skeletal and dentoalveolar effects of different types of microimplant-assisted rapid palatal expansion.","authors":"Hyeong-Yoon Choi, Sang-Min Lee, Jin-Woo Lee, Dong-Hwa Chung, Mo-Hyeon Lee","doi":"10.4041/kjod23.036","DOIUrl":"https://doi.org/10.4041/kjod23.036","url":null,"abstract":"Objective: To evaluate the following null hypothesis: the skeletal and dentoalveolar expansion patterns in the coronal and axial planes are not different with two different types of microimplant-assisted rapid palatal expansion (MARPE) systems.Methods: Pretreatment (T0) and post-MARPE (T1) cone-beam computed tomography (CBCT) images of 32 patients (14 males and 18 females; mean age, 19.37) were analyzed. We compared two different MARPE systems. One MARPE system included the maxillary first premolars, maxillary first molars, and four microimplants as anchors (U46 type, n = 16), while the other included only the maxillary first molars and microimplants as anchors (U6 type, n = 16).Results: In the molar region of the U6 and U46 groups, the transverse expansion at the midnasal, basal, alveolar, and dental levels was 2.64, 3.52, 4.46, and 6.32 mm and 2.17, 2.56, 2.73, and 5.71 mm, respectively. A significant difference was observed in the posterior alveolar-level expansion (p = 0.036) and posterior basal-bone-level expansion (p = 0.043) between the groups, with greater posterior skeletal and alveolar expansion in the U6 group.Conclusions: Compared with the U46 group, the U6 group showed greater posterior expansion at the alveolar and basal-bone levels, with an almost parallel split. Both groups showed a pyramidal expansion pattern in the coronal view.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"241-253"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/e8/0f/kjod-53-4-241.PMC10387429.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9917597","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

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IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod23.068RF

Sung-Hun Lim

引用次数: 0

Maxillary alveolar bone evaluation following dentoalveolar expansion with clear aligners in adults: A cone-beam computed tomography study. 成人牙槽骨扩张后清晰对准器对上颌牙槽骨的评价:锥束计算机断层扫描研究。

IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-07-25 DOI: 10.4041/kjod22.243

Marcio Antonio de Figueiredo, Fábio Lourenço Romano, Murilo Fernando Neuppmann Feres, Maria Bernadete Sasso Stuani, José Tarcísio Lima Ferreira, Ana Carla Raphaelli Nahás, Mírian Aiko Nakane Matsumoto

{"title":"Maxillary alveolar bone evaluation following dentoalveolar expansion with clear aligners in adults: A cone-beam computed tomography study.","authors":"Marcio Antonio de Figueiredo, Fábio Lourenço Romano, Murilo Fernando Neuppmann Feres, Maria Bernadete Sasso Stuani, José Tarcísio Lima Ferreira, Ana Carla Raphaelli Nahás, Mírian Aiko Nakane Matsumoto","doi":"10.4041/kjod22.243","DOIUrl":"https://doi.org/10.4041/kjod22.243","url":null,"abstract":"Objective: To investigate the effects of maxillary orthodontic expansion on the alveolar bone tissue in adult patients treated with aligners by using cone-beam computed tomography.Methods: Thirty patients (22 females and 8 males; mean age: 36.3 years) were treated with Invisalign® aligners. Cone-beam computed tomography and digital models were obtained before (T0) and after (T1) upper arch expansion. The bone thicknesses in the cervical, middle, and apical areas of the incisors, canines, premolar, and first molars were buccally and palatally measured, totaling 96 areas and 2,880 measurements. The buccolingual inclinations and transverse measurements of the teeth were obtained from digital models to correlate them with the bone changes. The statistical tests used were Student's t-test, analysis of variance, and Pearson's correlation tests (p < 0.05).Results: From the 96 areas evaluated, 84 revealed an increase or stability in the alveolar bone thickness and twelve displayed significant bone loss. Bone changes did not correlate with the tooth inclination and transverse measurements.Conclusions: Within the limitation of the present study, mild levels of upper arch expansion obtained with Invisalign® aligners in adult patients did not result in any clinically significant loss of alveolar bone thickness.","PeriodicalId":51260,"journal":{"name":"Korean Journal of Orthodontics","volume":"53 4","pages":"264-275"},"PeriodicalIF":1.9,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b1/f5/kjod-53-4-264.PMC10387425.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9921500","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

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IF 1.9 3区医学

Korean Journal of Orthodontics Pub Date : 2023-05-25 DOI: 10.4041/kjod23.011RF

Ji-Min Lee

引用次数: 0