Study On The Relationship Between Occlusion And Temporomandibular Joint Disorders

Objective: To investigate the correlation between occlusion and temporomandibular joint disorder, and provide data support for the etiology of the disease in the future. Methods: We selceted 704 persons to conduct health checks. Projects of health check: the function of TMJ, occlusal interference, tooth wear, dentition defect, deep cover, crossbite. The TMD were divided into the case group and TMD negative group as control. The data were sorted into spss 17.0, Chi square test was used to compare the rates, and the correlation was analyzed by Binary Logistic regression. Results: The prevalence rate of TMD is about 43.9%. 309 People showed positive signs of TMD, 395 cases negative. 176 cases(56.96%) with abnormal occlusion in TMD sign positive patients, including 36 cases of occlusal interference, 37 cases of tooth wear, 34 cases of missing teeth, 39 cases of deep covering, 30 cases of individual crossbite, and 133 cases without occlusal abnormality(43.04%). There were 135 patients(34.18%) with abnormal occlusion in the control group, including 28 cases of occlusal interference, 28 cases of tooth wear, 23 cases of missing teeth, 32 cases of deep covering, 24 cases of individual crossbite, and 260 cases without occlusal abnormality(65.82%). Single factor analysis of the comparison of the rate,in addition to individual crossbite, the rest of the four groups of P values were less than 0.05. Multi factor Logistic regression analysis showed that occlusal interference, tooth wear, deep cover, and dentition defect, the OR values were 2.328,2.319,2.472,2.160, P< 0.05. Conclusion: 1. The prevalence rate of TMD was 43.9% in the Han population in our hospital. 2 Occlusal abnormalities were related to the prevalence of TMD, including occlusal interference, tooth wear, deep cover, and dentition defect.