Chinese Journal of Oral Implantology最新文献_第3页

[Evaluation of the changes of alveolar bone around the upper incisors after retraction with mini implant anchorage using cone-beam CT]. [锥形束CT评价微型种植体支抗后上切牙牙槽骨的变化]。

Chinese Journal of Oral Implantology Pub Date : 2018-04-25 DOI: 10.19439/J.SJOS.2018.02.008

Chenghong Xiang, Zhang Xiang-feng, Huang Qian-qian, Zhang Yi, Yu Feng, W. Hua-qiao

{"title":"[Evaluation of the changes of alveolar bone around the upper incisors after retraction with mini implant anchorage using cone-beam CT].","authors":"Chenghong Xiang, Zhang Xiang-feng, Huang Qian-qian, Zhang Yi, Yu Feng, W. Hua-qiao","doi":"10.19439/J.SJOS.2018.02.008","DOIUrl":"https://doi.org/10.19439/J.SJOS.2018.02.008","url":null,"abstract":"PURPOSE The aim of this clinical study was to evaluate the changes of alveolar bone morphology before and after upper incisors retraction with mini implant anchorage using cone-beam CT (CBCT). METHODS Twenty-two young patients with dentoalveolar maxillary protrusion and extraction of 2 maxillary first premolars were evaluated with CBCT. CBCT scans were obtained before treatment and 3 months after retraction of the incisors. The movement patterns of the upper incisors were assessed with Mimics15.0. The labial and palatal alveolar plates at crest level, midroot level, and apical level for bone-thickness changes and labial and palatal vertical bone level during retraction of the maxillary anterior segments were assessed with Invivo5.0. Paired t tests were used to evaluate the changes. RESULTS The edge of the maxillary incisor and the root apex appeared lingual movement horizontally, but the moving distance was larger than the root apex. The edge of the incisors was moved downward, and the root apex was moved upward obviously. The palatal thickness and total thickness of the alveolar bone showed significant decrease at the crest level and midroot level after retraction while the apical level showed significant increase(P＜0.05). The palatal vertical bone level also showed great loss (P＜0.05). CONCLUSIONS After extensive retraction of the maxillary incisors, tilt movements are controlled with high traction hooks and microscrew implants. The decreases in palatal bone thickness are much more significant compared with the increases in labial bone thickness. Alveolar bone remodeling doesn't follow the movement of tooth, suggesting that the limitation of anterior teeth retraction should be taken into consideration.","PeriodicalId":436266,"journal":{"name":"Chinese Journal of Oral Implantology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128874180","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: 0

[Study on root canal variation of maxillary premolar and its relationship to maxillary sinus by cone-beam CT]. 上颌前磨牙根管变异及其与上颌窦关系的锥束CT研究

Chinese Journal of Oral Implantology Pub Date : 2018-04-25 DOI: 10.19439/J.SJOS.2018.02.009

Wei Meng-yao, Wang Xiao-li, Li Yan, Gao Ya

{"title":"[Study on root canal variation of maxillary premolar and its relationship to maxillary sinus by cone-beam CT].","authors":"Wei Meng-yao, Wang Xiao-li, Li Yan, Gao Ya","doi":"10.19439/J.SJOS.2018.02.009","DOIUrl":"https://doi.org/10.19439/J.SJOS.2018.02.009","url":null,"abstract":"PURPOSE To investigate the anatomic morphology of root and root canal system of maxillary premolars by using cone-beam computer tomography (CBCT), in order to provide imaging basis for clinical treatment. METHODS CB CT images of 720 patients (aged from 18 to 67 years) were included. They were divided into 5 groups according to their ages：18-28，29-38，39-48，49-58 and＞58 years old . The number of roots and root canals, root canal configuration, the distance between two orifices,root canal curvature,distance from apex to maxillary sinus,symmetry of the bilateral teeth and its relationship to age changes were analyzed statistically using SPSS21.0 software package. RESULTS Double root canal of the first maxillary premolar accounted the most (89.72%), and type IV was the frequent type (57.78%) . The incidence of single root canal in the second maxillary premolar (53.06%) was slightly higher than double root canal (46.94%). Root canal type was mainly type I (53.06%). There was symmetrical distribution in the bilateral root and root canals of maxillary premolars. The detection rate of the single root canal was changed with age, and the distance between the two orifice was closely related to the root morphology. The detection rate of root curvature in maxillary first and second premolar was 32.53% and 21.50% in buccolingual direction. There was a certain proportion of S-type complex root canal.16.69% of the maxillary second premolar and maxillary sinus were closely related (d≤0.05 mm). CONCLUSIONS The anatomical structure of root and root canal is complicated .The prevalence of the bilateral teeth presents symmetry and age-related changes.The curvature of root canal is complex, and the roots are closely related to maxillary sinus.","PeriodicalId":436266,"journal":{"name":"Chinese Journal of Oral Implantology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131349546","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: 2

Influences of destroyed apical constriction on the accuracy of PropexII electronic apex locator 根尖收缩破坏对PropexII型电子根尖定位仪精度的影响

Chinese Journal of Oral Implantology Pub Date : 2017-06-25 DOI: 10.19439/J.SJOS.2017.03.003

Huang Yu-feng, Jin Wen-zhong

引用次数: 0

Effects of free dental filling interventions on early childhood primary tooth caries in Shanghai Jiading district 上海市嘉定区免费补牙干预对儿童早期乳牙龋病的影响

Chinese Journal of Oral Implantology Pub Date : 2017-06-01 DOI: 10.19439/J.SJOS.2017.03.013

D. Hua, Zhang Shu-yu, Liu Yue-ling

引用次数: 0

Effect of PKC inhibition on cell migration and invasion of oral squamous cell carcinoma PKC抑制对口腔鳞癌细胞迁移及侵袭的影响

Chinese Journal of Oral Implantology Pub Date : 2017-04-01 DOI: 10.19439/J.SJOS.2017.02.009

C. Zhong, Xu Yong, J. Qing

引用次数: 0