覆盖义齿和全口义齿咀嚼功能的比较研究

目的：对比研究全口覆盖义齿和全口义齿的咀嚼功能。方法：选择13例全口覆盖义齿修复患者，14例全口义齿修复患者，测试咀嚼杏仁和小枣时的咀嚼效率，记录下颌运动轨迹；记录左右侧嚼肌，颞肌前束，颞肌后束在息止颌位，大力咬合和咀嚼小枣和杏仁时的肌电图。结果：覆盖义齿组咀嚼杏仁和小枣的效率显著高于常规总义齿组，下颌运动轨迹的规则性和末端集中性优于常规总义齿组，咀嚼运动中，覆盖义齿组颞肌前后束的肌电活动显著强于常规总义齿组，且肌电活动中提颌肌群的协同作用更加明显，结论：全口覆盖义齿对无牙颌患者咀嚼功能的恢复显著优于全口义齿，是一种良好的修复方式。

A comparison study of masticatory function between patients with overdentures and complete dentures

Objective To compare the masticatory function of patients rehabilitated with complete overdentures and complete dentures.Methods Thirteen subjects with complete overdentures and fourteen subjects with complete dentures more than half a year were studied by means of measuring masticatory efficiency, recording mandibular movement trace and electromyography of masseter muscles and anterior and posterior portions of temporalis muscles during mastication.Results The subjects with complete overdentures had better masticatory performance, better regulation of chewing cycle, more centralized end tracks during mastication, and higher EMG activities of anterior and posterior portions of temporalis muscles than those with complete dentures.Conclusion The patients with complete overdentures have better masticatory function than those with complete dentures.