[牙合]垫对牙齿重度磨耗患者口颌功能影响的临床研究

目的：研究殆垫对牙齿重度磨耗患者口颌功能的影响。方法：用殆垫恢复10例牙齿重度磨耗患者的垂直距离，分别检测治疗前、治疗后1个月、3个月、6个月的咬合平衡性、咬肌及颞肌前束的肌电幅值、颌位及殆的稳定性以及边缘运动的平滑度及对称性的变化。结果：①咬合平衡性、颌位及胎的稳定性以及边缘运动轨迹的平滑度及对称性在治疗后呈逐渐改善趋势，治疗6个月后80％的患者恢复正常；②治疗后各组的息止位肌电幅值均较治疗前显著降低（P〈0．05），正中颌位紧咬时肌电幅值在治疗后3个月组和6个月组较治疗前显著增加（P〈O．05）。结论：通过6个月的治疗和观察，聆垫对重度磨耗患者的口颌功能的影响呈现持续改善趋势。

The clinical study on the effect of occlusal splint on stomatognathic function in patients with severe tooth wear.

Objective： To investigate the effect of occlusal splint on stomatognathic function in patients with severe tooth wear. Method：Occlusal splints were used to restore the occlusal vertical distance of 10 patients with severe tooth wear. The balance of occlusal force distribution, the EMG amplitude of the masseter and anterior temporal muscle, the sta- bility of mandibular position and occlusion, the smoothness and symmetry changes in maximal mandibular movement, were detected and analyzed before and 1,3,6 months after using occlusal splints. Result： ①The balance of occlusal force distri- bution, the stability of mandibular position and occlusion,the smoothness and symmetry changes in maximal mandibular movement, improved gradually after using occlussal splints. After 6 months treatment 80 % of patients recoverd to normal state. ②EMG amplitude of the masseter and anterior temporal muscle at rest position reduced significantly after treatment （P 〈0.05）. EMG amplitude of the masseter and anterior temporal muscle at clenching intercuspal postion were higher signifi- cantly in 3 months and 6 months groups than pretreatment group （P 〈0.05）. Conclution： Within the observational period of 6 months, occlusal splint can improve stomatognathic function of patients with severe tooth wear.