The Angle orthodontist最新文献_第10页

The Angle orthodontist Pub Date : 2020-11-04 DOI: 10.4274/tmsj.galenos.2020.07.03.09

S. Anvery, Pramod Philip

引用次数: 0

Evaluation of the effects of the hybrid Pendulum in comparison with the conventional Pendulum appliance. 比较混合摆与传统摆器的效果。

The Angle orthodontist Pub Date : 2020-03-01 DOI: 10.2319/051719-340.1

Erdal Bozkaya, T. Tortop, S. Yüksel, Emine Kaygısız

{"title":"Evaluation of the effects of the hybrid Pendulum in comparison with the conventional Pendulum appliance.","authors":"Erdal Bozkaya, T. Tortop, S. Yüksel, Emine Kaygısız","doi":"10.2319/051719-340.1","DOIUrl":"https://doi.org/10.2319/051719-340.1","url":null,"abstract":"OBJECTIVE\u0000To evaluate the anchorage control and distalization of maxillary molars with the hybrid Pendulum appliance and to compare the results with a conventional Pendulum appliance.\u0000\u0000\u0000MATERIALS AND METHODS\u0000This study was carried out on the pre-(T0) and post-(T1) treatment lateral cephalograms and dental casts of 43 patients with Angle Class II molar relationships who were treated with conventional or hybrid Pendulum appliances. The hybrid Pendulum (HP) group consisted of 22 patients (14 females; eight males; mean age 14.3 ± 2.43 years) and treatment results were compared with a conventional Pendulum appliance (CP) group, which consisted of 21 patients (15 females; six males; mean age 14.6 ± 3.39 years). Intragroup comparisons were made with Wilcoxon test and intergroup comparisons were made with Mann-Whitney U-test (P < .05).\u0000\u0000\u0000RESULTS\u0000The mean distalization duration was 0.70 ± 0.25 years in the HP group and 0.83 ± 0.4 years in the CP group. Maxillary first molars showed significant distal movement and tipping of 4.25 mm and 9.09° in the HP group, and 3.21 mm and 9.86° in the CP group. Loss of anchorage at the first premolars was significantly smaller in the HP appliance group compared to CP group. The second premolars distalized spontaneously in the HP group while they mesialized significantly in the CP group. Proclination and protrusion of maxillary incisors were greater with the CP appliance compared to the HP appliance.\u0000\u0000\u0000CONCLUSIONS\u0000Maxillary molar distalization was achieved with both appliances. Mesialization of the anchorage unit was controlled successfully with the hybrid Pendulum; however, the conventional Pendulum appliance caused anchorage loss.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84595540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study. 下颌圆形旋转牙的清牙矫正治疗:有限元研究。

The Angle orthodontist Pub Date : 2020-03-01 DOI: 10.2319/020719-86.1

A. Cortona, G. Rossini, S. Parrini, A. Deregibus, T. Castroflorio

{"title":"Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study.","authors":"A. Cortona, G. Rossini, S. Parrini, A. Deregibus, T. Castroflorio","doi":"10.2319/020719-86.1","DOIUrl":"https://doi.org/10.2319/020719-86.1","url":null,"abstract":"OBJECTIVE\u0000To evaluate, using the finite element method, the orthodontic rotational movement of a lower second premolar obtained with clear aligners, analyzing different staging and attachment configurations.\u0000\u0000\u0000MATERIALS AND METHODS\u0000A CAD model including a complete lower dental arch (with element 4.5 mesially rotated 30°) and the corresponding periodontal ligaments, attachments, and aligner was designed and imported to finite element software. Starting from the CAD model, six projects were created to simulate the following therapeutic combinations for correcting element 4.5 position: (1) without attachments, (2) single attachment placed on the buccal surface of element 4.5, (3) three attachments placed on the buccal surfaces of teeth 4.4 to 4.6. For each project, both 1.2° and 3° of aligner activation were considered.\u0000\u0000\u0000RESULTS\u0000All the analyzed configurations revealed a clockwise rotation movement of element 4.5 on the horizontal plane. Models with attachments showed a greater tooth displacement pattern than models without attachments. Simulations with attachments and 3° of aligner activation exhibited the best performance concerning tooth movement but registered high stresses in the periodontal ligaments, far from the ideal stress levels able to produce tooth rotational movement.\u0000\u0000\u0000CONCLUSIONS\u0000The model with a single attachment and 1.2° of aligner activation was the most efficient, followed by the three attachment model with the same degree of activation. Aligner activation should not exceed 1.2° to achieve better control of movement and reasonable stress in periodontal structures.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80728373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 52

Evaluation of condyle-fossa relationships in adolescents with various skeletal patterns using cone-beam computed tomography. 使用锥形束计算机断层扫描评估不同骨骼类型青少年的髁突-窝关系。

The Angle orthodontist Pub Date : 2020-03-01 DOI: 10.2319/052919-369.1

J. Chae, Jae Hyun Park, Kiyoshi Tai, Kyosuke Mizutani, Satoshi Uzuka, Wataru Miyashita, Hye Young Seo

{"title":"Evaluation of condyle-fossa relationships in adolescents with various skeletal patterns using cone-beam computed tomography.","authors":"J. Chae, Jae Hyun Park, Kiyoshi Tai, Kyosuke Mizutani, Satoshi Uzuka, Wataru Miyashita, Hye Young Seo","doi":"10.2319/052919-369.1","DOIUrl":"https://doi.org/10.2319/052919-369.1","url":null,"abstract":"OBJECTIVES\u0000To evaluate the condyle-fossa relationship in adolescents with various skeletal patterns using cone-beam computed tomography (CBCT).\u0000\u0000\u0000MATERIALS AND METHODS\u0000CBCT images obtained in 120 adolescent patients were used for this study. The patients were divided into 3 groups according to 3 criteria: (1) age (early, middle, and late adolescence); (2) facial height ratio or Jarabak quotient (hyperdivergent, normodivergent, and hypodivergent); and (3) ANB classification (Class I, Class II, and Class III). Temporomandibular joint space (TMJS: AS, anterior space; SS, superior space; PS, posterior space; MS, medial space; LS, lateral space), width and depth of the condyle (MLT, mediolateral thickness; APT, anteroposterior thickness), articular slope (ArS)m and vertical height of the fossa (VHF) were measured and compared using CBCT.\u0000\u0000\u0000RESULTS\u0000Differences in condyle-fossa relationships were not significantly different between male and female adolescents, but were significantly different (P < .05) between left and right sides. The mean values showed no statistical differences according to age and skeletal pattern. Most measurements in the sagittal view showed that SS was the greatest, and the mean ratio of AS to SS to PS was 1.00 to 1.27 to 1.19, respectively. The mean values of coronal MS and LS were not significantly different.\u0000\u0000\u0000CONCLUSIONS\u0000There were almost no statistical differences in the TMJS in adolescents across various factors except between left and right sides.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75352807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Masticatory function after bite-raising with light-cured orthodontic band cement in healthy adults. 光固化正畸带水泥对健康成人咬合后咀嚼功能的影响。

The Angle orthodontist Pub Date : 2020-03-01 DOI: 10.2319/021519-112.1

C. Changsiripun, Darin Pativetpinyo

{"title":"Masticatory function after bite-raising with light-cured orthodontic band cement in healthy adults.","authors":"C. Changsiripun, Darin Pativetpinyo","doi":"10.2319/021519-112.1","DOIUrl":"https://doi.org/10.2319/021519-112.1","url":null,"abstract":"OBJECTIVES\u0000To evaluate the effects of bite-raising with light-cured orthodontic band cement, a method commonly used in contemporary orthodontic treatment, on masticatory function, as assessed by objective and subjective methods.\u0000\u0000\u0000MATERIALS AND METHODS\u0000The objective evaluation of masticatory performance and subjective evaluation of masticatory ability were performed on 30 healthy volunteers (19 females and 11 males, 22.3 ± 1.56 years) with a normal occlusion. Assessment was performed before and immediately after bite-raising. The bite-raising was done by adding light-cured orthodontic band cement (3 × 5 × 2-mm width × length × height) on the palatal cusps of the upper first molars. The masticatory performance index (MPI) was calculated from chewed test food particles using a sieving method. For the subjective evaluation, the participants performed the food intake ability (FIA) test using a questionnaire with six types of food. The correlation between the evaluation methods was determined.\u0000\u0000\u0000RESULTS\u0000The MPI and FIA scores of the participants were significantly reduced after bite-raising (P < .001). The MPI and FIA score reduction was not significantly different between females and males. No significant correlations were found between the changes in MPI and FIA scores.\u0000\u0000\u0000CONCLUSIONS\u0000Masticatory function after bite-raising with light-cured orthodontic band cement was immediately reduced, both objectively and subjectively. However, because there was no significant correlation between the objective and subjective results, an individual may not perceive his/her decreased masticatory ability to the same degree as masticatory performance was reduced. Further study is required to evaluate the long-term adaptation to this bite-raising method.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90641337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Academic Orthodontic Opportunities 学术正畸机会

The Angle orthodontist Pub Date : 2020-03-01 DOI: 10.2319/0003-3219-90.2.318

引用次数: 0

Reviewers For The Angle Orthodontist For 2019. 2019年角度正畸医生的审稿人。

The Angle orthodontist Pub Date : 2020-01-14 DOI: 10.2319/0003-3219-90.1.160

引用次数: 0

Effectiveness of miniscrew-supported maxillary incisor intrusion in deep-bite correction: A systematic review and meta-analysis. 微型支托上颌切牙侵入在深咬合矫正中的有效性:系统回顾和荟萃分析。

The Angle orthodontist Pub Date : 2019-12-09 DOI: 10.2319/061119-400.1

Rami Sosly, H. Mohammed, Mumen Z Rizk, Eias Jamous, Ahmad G Qaisi, D. Bearn

{"title":"Effectiveness of miniscrew-supported maxillary incisor intrusion in deep-bite correction: A systematic review and meta-analysis.","authors":"Rami Sosly, H. Mohammed, Mumen Z Rizk, Eias Jamous, Ahmad G Qaisi, D. Bearn","doi":"10.2319/061119-400.1","DOIUrl":"https://doi.org/10.2319/061119-400.1","url":null,"abstract":"OBJECTIVES\u0000To evaluate systematically the effectiveness of miniscrew-supported maxillary incisor intrusion compared with other nonsurgical intrusive mechanics for deep-bite correction.\u0000\u0000\u0000MATERIALS AND METHODS\u0000Unrestricted electronic searches in Embase, Web of Science, MEDLINE, LILACS, and Cochrane's CENTRAL as well as manual searches were conducted up to August 2019. Only randomized clinical trials (RCTs) were included. Study selection, data extraction, and bias assessment were done by two independent reviewers. The Cochrane risk-of-bias tool was used, and the quality of evidence was graded using the GRADE approach. A random-effects meta-analysis of continuous data, with its 95% confidence intervals (CIs), was used.\u0000\u0000\u0000RESULTS\u0000Seven RCTs were included in the quantitative synthesis, and the overall quality of evidence was very low to low. When compared with intrusion arches, miniscrews resulted in a more efficient deep-bite reduction with a standardized mean difference (SMD) of -0.48 (95% CI, -0.89 to -0.07). When miniscrews were used, a statistically significant difference was observed favoring less maxillary molar extrusion (SMD, -0.86; 95% CI, -1.46 to -0.27) and more incisor intrusion as measured from centroid to palatal plane (SMD, -0.95; 95% CI, -1.41 to -0.49). Results also showed a statistically nonsignificant difference regarding the amount of resultant root resorption between miniscrews and intrusion arches.\u0000\u0000\u0000CONCLUSIONS\u0000There is weak evidence indicating efficient deep-bite correction using miniscrews. Root resorption seems to be an associated adverse effect that occurs regardless of the intrusive mechanics used. These conclusions should be viewed with great caution as further well-designed long-term research is recommended.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85494471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Evaluation of toxicity and response to oxidative stress generated by orthodontic bands in human gingival fibroblasts. 正畸带对人牙龈成纤维细胞氧化应激反应的毒性评价。

The Angle orthodontist Pub Date : 2019-12-05 DOI: 10.2319/110717-761.1

Alexandre Marcos Bandeira, E. F. Martinez, A. Demasi

{"title":"Evaluation of toxicity and response to oxidative stress generated by orthodontic bands in human gingival fibroblasts.","authors":"Alexandre Marcos Bandeira, E. F. Martinez, A. Demasi","doi":"10.2319/110717-761.1","DOIUrl":"https://doi.org/10.2319/110717-761.1","url":null,"abstract":"OBJECTIVE\u0000To evaluate the cytotoxicity of stainless-steel orthodontic bands and their influence on the expression of the antioxidant genes in human gingival fibroblasts.\u0000\u0000\u0000MATERIALS AND METHODS\u0000Ten bands of each brand (Dentsply-Sirona, Dentaurum, TP Orthodontics, and Morelli) were conditioned in 0.2 g/mL culture medium at 37°C for 14 days, and the corresponding conditioned media were applied over the fibroblasts. Cell viability was assessed after 24, 48, and 72 hours of exposure to the conditioned media by trypan blue exclusion assay. Expression of the antioxidant defense genes peroxiredoxin 1 (PRDX1), superoxide dismutase 1 (SOD1), and glutathione peroxidase 1 (GPX1) were evaluated by quantitative polymerase chain reaction after 24 hours of exposure. These parameters were compared to those of the cells not exposed to the conditioned media of the bands (control).\u0000\u0000\u0000RESULTS\u0000All bands promoted a reduction in the number of viable cells in the periods of 48 and 72 hours (P < .01). Analysis of gene expression showed a significant increase in the levels of PRDX1 transcripts caused by the conditioned media of the Dentsply-Sirona, TP Orthodontics, and Morelli bands (P < .01) as well as induction of SOD1 by the conditioned media of the Dentaurum and Morelli (P < .01). Expression of GPX1 was not influenced by the conditioned media.\u0000\u0000\u0000CONCLUSIONS\u0000The orthodontic bands showed toxicity to fibroblasts and increased the expression of PRDX1 and SOD1 antioxidant genes, indicating induction of oxidative stress in the cells.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"386 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76463174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Factors associated with spontaneous mesialization of impacted mandibular third molars after second molar protraction. 下颌第二磨牙拔除后阻生第三磨牙自发性内化的相关因素。

The Angle orthodontist Pub Date : 2019-11-26 DOI: 10.2319/050919-322.1

U. Baik, Jin Hye Kang, Ui-Lyong Lee, Nikhilesh R Vaid, Yoon-Ji Kim, Dong-Yul Lee

{"title":"Factors associated with spontaneous mesialization of impacted mandibular third molars after second molar protraction.","authors":"U. Baik, Jin Hye Kang, Ui-Lyong Lee, Nikhilesh R Vaid, Yoon-Ji Kim, Dong-Yul Lee","doi":"10.2319/050919-322.1","DOIUrl":"https://doi.org/10.2319/050919-322.1","url":null,"abstract":"OBJECTIVES\u0000To investigate factors associated with spontaneous mesialization of impacted third molars after second molar protraction to close the space caused by a missing mandibular first molar (L-6) or retained deciduous mandibular second molars with a missing succedaneous premolar (L-E).\u0000\u0000\u0000MATERIALS AND METHODS\u0000Panoramic radiographs of patients treated with mandibular second molar protraction to close the space due to missing L-6 or L-E (14 males, 36 females, mean age = 18.6 ± 4.4 years) were analyzed before treatment (T1) and after second molar protraction (T2). Factors associated with the amount of third molar mesialization were investigated using regression analyses.\u0000\u0000\u0000RESULTS\u0000Mandibular second molars were protracted by 5.1 ± 2.1 mm and 5.8 ± 2.7 mm, measured at the crown and root furcation, respectively. After second molar protraction, third molars showed spontaneous mesialization by 4.3 ± 1.6 mm and 3.8 ± 2.6 mm, measured at the crown and root furcation, respectively. Nolla's stage of the third molar at T1 (B = 0.20, P = .026) and second molar protraction time (B = 0.04, P = .042) were significantly associated with the amount of third molar mesialization.\u0000\u0000\u0000CONCLUSIONS\u0000Greater third molar mesialization was observed when Nolla's stage of the third molar was higher before treatment and when the second molar protraction time was longer.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79458343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4