咬合垂直距离减低的无牙颌TMD患者髁状突位置的变化

Study on edentulous TMD patients with decreased vertical dimension

目的:探讨咬合垂直距离改变对无牙颌颞下颌关节功能紊乱综合征(TMD)患者两侧颞颌关节髁状突位置的影响。方法:对无牙颌TMD垂直距离减低的48例患者恢复垂直距离前后,测量关节间隙。结果:旧全口义齿正中咬合位时,左侧髁状突前间隙左侧小于右侧,后间隙左侧大于右侧(左前1.60mm,右前2.34mm。左后2.80mm,右后1.96mm),差异有显著性。新旧全口义齿正中咬合时相比较,左侧后,右侧前后间隙的改变为新全口义齿小于旧全口义齿(左后2.32mm,2.82mm;右前1.98mm,2.34mm),具有显著性差异,左侧前,右侧后间隙新义齿大于旧义齿(左前2.02mm,1.60mm,右后2.34mm,1.96mm),具有极显著性差异。结论:恢复无牙颌咬合垂直距离后可以使两侧髁状突位置对称,从而可以治疗无牙颌TMD。

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, 2.34ram）, 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.