Study on edentulous TMD patients with decreased vertical dimension

Objective:To observe the effect of condylar position before and after vertical dimension restoration of complete denture in edentulous TMD patients.Methods:Schuller's positional radiographs were made of all 48 patients in 3 groups.Joint spaces between the glenoid fossa were measured on the centric occlusion.Results:Before recover occlusal vertical dimension there was an obvious difference in anterior and posterior spaces（1.60mm,2.34mm;2.80mm,1.96mm）.After recover occlusal vertical dimension on centric occlusion there was an obvious difference in left posterior and right anterior spaces（2.32mm,2.82mm;1.98mm,2.34mm）,and significant difference in left anterior and right posterior spaces（2.02mm,1.60mm,2.34mm,1.96mm）.Conclusion:The TMD can be caused by the change of vertical dimension in edentulous patients.