Correlations between temporomandibular disorder and orthodontic treatment in adult patients

VernacularTitle:成人正畸治疗与颞下颌关节紊乱病的MRI研究
Author: Dun-Hong JIAN ¹ ; Ru-Ling WANG ; Hai-Ying GUO ; Li-Zhen WANG
Author Information

1. 深圳市龙岗区第二人民医院口腔科
Keywords: Temporomandibular joint; Magnetic resonance imaging; Orthodontics,corrective
From: Chinese Journal of Stomatology 2012;47(z1):137-140
CountryChina
Language:Chinese
Abstract: Objective To investigate the correlations between temporomandibular disorder(TMD)and orthodontic treatment in adult patients.Methods Sixty adult orthodontic patients,aged from 20 to 29 years old,were divided into two groups according to Helkimo index.Group Ai =0 included 44 patients.Group Ai =Ⅰ included 16 patients.Before and after orthodontic treatment,temporomandibular joint disc positions were measured in MRI images.According to Helkimo index,the function of temporomandibular joint (TMJ) was evaluated.Results The incidence of TMD in Group Ai =Ⅰ (8/16) was much higher than in Group Ai =0 (9/44) (P ＜ 0.05).The anterior displacements of the temporomandibular joint disc were found.After orthodontic treatment,anterior space area of TMJ was increased and posterior space area was reduced(P ＞ 0.05).Conclusions Orthodontic treatment couldn't cause TMD,but it might induce and aggravate the symptoms of TMJ.