Orthodontic retreatment of an adult woman with mandibular backward positioning and temporomandibular joint disorder:A case report  

作　　者：Li-Yuan Yu Kai Xia Wen-Tian Sun Xin-Qi Huang Jing-Yu Chi Ling-Jie Wang Zhi-He Zhao Jun Liu 

机构地区：[1]State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases,Department of Orthodontics,West China Hospital of Stomatology,Sichuan University,Chengdu 610041,Sichuan Province,China [2]Department of Stomatology,Strategic Support Force Medical Center of PLA,Beijing 10010,China [3]Department of Stomatology,Qingyang People's Hospital,Qingyang 745000,Gansu Province,China

出　　处：《World Journal of Clinical Cases》2022年第2期691-702,共12页世界临床病例杂志

摘　　要：BACKGROUND The role of occlusal factors on the occurrence of temporomandibular joint disorders(TMDs)is still unclear and it is tricky for orthodontists to treat malocclusions in patients with TMDs.We report the case of the second orthodontic treatment of an adult female with Class II division 2 malocclusion associated with TMD.With the removal of anterior occlusal interference,TMD symptoms were alleviated and cone beam computed tomography(CBCT)images showed the bilateral condyles shifted forward.CASE SUMMARY This case report presented an orthodontic retreatment of an adult female with TMD and mandibular backward positioning based on CBCT examination and Joint Space Index(JSI)analysis.The left and right JSI values of-38.5 and-52.6 indicated that the position of bilateral condyles had posterior displacement.Ten years prior to this evaluation,she underwent orthodontic treatment resulting in the extraction of two upper premolars and one lower central incisor.The joint symptoms,including pain and sounds,were alleviated along with verified mandibular forward repositioning by extraction of another lower central incisor.CONCLUSION Mandibular backward positioning could be associated with TMD.JSI analysis based on CBCT is a convenient way to examine condylar positions quantitatively.

关 键 词：Cone beam computerized tomography Joint Space Index Temporomandibular joint disorder Case report 

分 类 号：R782.6[医药卫生—口腔医学] R783.5[医药卫生—临床医学]