低位咬合伴颞下颌关节结构紊乱患者的咬合重建治疗临床效果分析

目的：对低位咬合伴颞下颌关节结构紊乱患者进行咬合重建修复，分析其临床效果。方法：观察14例符合条件患者治疗前、暂时性胎垫治疗后、永久性修复治疗后临床症状、关节间隙及肌电图的变化。结果：（1）暂时性胎垫及永久性修复治疗后临床症状和关节间隙与治疗前相比，结果均有统计学意义（P〈0．05）。（2）静息状态下胎垫治疗及永久性修复后，颞肌前束（TA）和咬肌（MM）肌电活动减弱，有统计学意义（P〈0．05）；但在最大紧咬状态下胎垫治疗后肌电活动变化无统计学意义（P〉0．05），而永久性修复后肌电活动显著增强，变化有统计学意义（P〈0．05）。结论：咬合重建缓解了颞下颌关节相关症状，永久性修复较暂时性修复达到了更为理想的咬合接触状态，咬合过程中咀嚼肌的功能得到了充分的发挥。

Clinical effect of occlusal reconstruction therapy for the patients with infraocclusion and temporomandibular internal derangement

Objective: To discuss and analyze the clinical effects of occlusal reconstruction therapy for the patients with infraocclusion and temporomandibular internal derangement. Methods: 14 reasonable patients were chosen and their clinical symptoms, joint spaces and electromyographics were observed at three stages-pretherapy, temporary occlusal pad therapy and permanent reparation. Results: (1) Compared with pretherapy, changes of clinical symptoms and joint spaces after temporary occlusal pad therapy and permanent reparation had statistical significant differences (P <0.05). (2) Myoelectricities of TA and MM after temporary occlusal pad and permanent reparationtherapy diminished obviously at quiescent condition (P <0.05). At max biting condition, myoelectricity changes of temporary occlusal pad therapy had no statistical significance (P >0.05), but permanent reparation had obvious statistical significance (P <0.05). Conclusion: Occlusal reconstruction can relieve symptoms of TMJ,permanent restoration achieves more ideal biting touch conditions.