【摘要】 目的 :观察无牙颌患者总义齿 (CD)修复和种植覆盖义齿 (IOD)修复后的咀嚼功能的差异。方法 :3名无牙颌患者参加此项比较研究。在患者上颌总义齿不更换的条件下 ,先后进行CD修复和IOD修复 ,比较其正常使用 3个月后的咀嚼效率、下颌运动轨迹和肌电图。结果 :3名患者在IOD修复后咀嚼效率均得到了明显改善 ,尤以咀嚼杏仁的效率提高显著。下颌运动的规则性和末端集中性均得到了明显改善 ,咀嚼运动中的牙合接触滑动不同程度的增加。嚼肌与颞肌前后束在IOD修复后整体活动加强 ,节律性改善。其活动的增加主要通过增加运动单位的收缩强度来完成。 2名患者咀嚼肌的用力方式由不固定变为固定 ,1名患者由固定的嚼肌用力为主变为固定的颞肌用力为主。结论 :IOD修复较CD修复能获得更高的咀嚼效率、更加规则的下颌运动型、更加高效的咀嚼肌收缩模式和协同方式 ,对无牙颌患者是一种较好的修复选择更多还原

【Abstract】 Objective:To make a within-subject comparison of masticatory function and pattern between complete denture(CD)and implant-supported overdneture(IOD).Methods: Three edentulous patients volunteered to take part in this test.Each of the patients was rehabilitated with lower CD first and lower IOD later,and with the upper denture of CD.The masticatory efficiency,mandibular movement trace and the surface electromyograph (EMG) of masseters,anterior temporlis and posterior temporlis were measured 3 month after the use of each set of the dentures.Results: With IOD,each patient increased masticatory efficiency,especially when chewing almond.The regulation of chewing cycle,centralization of end traces and occlusal slides of mandibular movement were significantly improved.The electricactivity of masseters,anterior and posterior temporlis all enhanced by means of increasing contract intensity and the rhythm of the mastication was more regular.The muscle activity pattern in two cases transformed from instable to stable,while that of the another patient changed from masseter preponderant pattern to temporlis preponderant pattern.Conclusion: Patients with IOD have a heigher masticatory efficiency,more regular mandibular movement pattern,more effective masticatory muscle contractive pattern and masticatory muscle coordinative pattern than those with CD.更多还原