Wang Yun-Ji, Chen Song, Shi An-Tian, Wu Yan, Deng Xiao
Chongqing Key Laboratory for Oral Diseases and Biomedical Science, the Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, China.
Sichuan Da Xue Xue Bao Yi Xue Ban. 2013 Mar;44(2):231-6.
To investigate the relationship between the degree of displacement of centric relation-maximum intercuspation (CR-MI) and temporomandibular dysfunction (TMD) in Class II patients.
The questionnaire and clinical examination were administered in 107 Class II patients and students, using the Helkimo index (Di and Ai). The differences in condylar position between CR and MI in all three spatial planes were measured using the Condyle Position Indication (CPI).
Di positively correlated with degree of CR-MI displacement in all five displacement (P < 0.05), while Ai positively correlated with degree of CR-MI displacement except horizontal displacement. Di and Ai significantly correlated with degree of CR-MI discrepancy in all five displacement (P < 0.05); With the increasing of Di and Ai rank, the degree of CR-MI displacement and CR-MI discrepancy increased. Also, symptoms of TMD were significantly correlated with the degree of CR-MI displacement and CR-MI discrepancy except horizontal displacement (P < 0.05). Severer CR-MI displacement and CR-MI discrepancy were observed in patients who had TMD symptoms.
In Class II patients, degree of CR-MI displacement is an important factor of TMD, and correlated with the severity of TMD.
探讨安氏II类患者正中关系位-最大牙尖交错位（CR-MI）的移位程度与颞下颌关节紊乱病（TMD）之间的关系。
对107例安氏II类患者及学生进行问卷调查和临床检查，采用Helkimo指数（Di和Ai）。使用髁突位置指示器（CPI）测量CR和MI在三个空间平面上髁突位置的差异。
在所有五种移位中，Di与CR-MI移位程度呈正相关（P<0.05），而Ai除水平移位外与CR-MI移位程度呈正相关。Di和Ai在所有五种移位中均与CR-MI差异程度显著相关（P<0.05）；随着Di和Ai等级的增加，CR-MI移位程度和CR-MI差异增加。此外，TMD症状与CR-MI移位程度和CR-MI差异（水平移位除外）显著相关（P<0.05）。有TMD症状的患者观察到更严重的CR-MI移位和CR-MI差异。
在安氏II类患者中，CR-MI移位程度是TMD的一个重要因素，并与TMD的严重程度相关。
