CBCT Analysis Of50Patients With Temporomandibular Joint Disorders

Objective:In this study, we obtained3D reconstructed images of temporomandibular joint of patients with temporomandibular joint disorders by cone beam CT (CBCT), measured temporomandibular joint space parameters of patients with TMD by CBCT software and AutoCAD software system. The purpose of the study is to explore the effect of temporomandibular joint disorder on temporomandibular joint morphology, and provide diagnostic basis for clinical diagnosis of temporomandibular joint disorders.Methods:We selected50patients suffering from temporomandibular disorder as the experimental group which are all from the clinic of Stomatology Hospital of Lanzhou University during from2011to2012, Selecting10cases of healthy people without temporomandibular joint symptoms as the control group, conducted image scanning by CBCT, reconstructed the scanned images, and then selected the required reference plane. in the selected axial images, measured the radius value of temporomandibular joint, the short axis diameter of the condyle, the long axis diameter of the condyle and condyle horizontal angle.In the selected correction of sagittal, measured the joint space, the depth of the joint concave, the angle a of articular eminence, oblique measuring. In the selected correction of coronal, measured the angle (3of condyle vertical and the angle a of condyle stress. all subjects were measured three times by the experimenter himself, all data were analyzed by SPSS17.0statistical software, expressed as M±SD, the same sample were analyzed by paired t test,the different sample were analyzed by independent sample t test, and P<0.05, indicated statistical significance.Results:1.compared with the condylar morphology on the left and right sagittal joint gap, sagittal joint clearance, articular eminence inclination, joint concave depth, The case group and the control group, the difference were statistically significant(P<0.05), The left condyle diameter width and the stress angle a condylar difference between two groups was statistically significant (P<0.05).other groups could not believe that there was a difference(P>0.05).2.Compared to the same individual cases on the left and the right sides of different projection position of temporomandibular joint measurement results, the axial horizontal angle, the articular tubercle angle, joint concave depth, sagittal condylar axis angle in vertical joint gap between the two sides of the difference was statistically significant (P<0.05). the remaining items were not statistically significant (P>0.05). Comparison of left and right sides of measurement results of the control group, were not considered statistically significant (P>0.05).Conclusion:The temporomandibular joint bone morphology of Patients with temporomandibular joint disorder,compared with normal people are different,. Description TMD can lead to temporomandibular joint bone change in the structure.The condyle, articular fossa with ical differences,using CBCT can provide diagnostic basis for clinical diagnosis of temporomandibular joint disorder.