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戴用全口义齿不同时间的咀嚼肌肌电图表现 被引量:5

A preliminary study on the relationship between the wearing time of full denture and EMG in edentulous patients
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摘要 目的:通过测定咀嚼肌肌电变化,分析全口义齿戴用时间与咀嚼功能的关系。方法:对30例初戴全口义齿2周的患者与32例戴用全口义齿3个月以上的患者,应用MedelecSynergy肌电仪,测定咀嚼运动时双侧颞肌前束与咬肌的表面募集电位、募集电位时限、面积,并计算肌不对称指数。2组数据采用t检验进行统计学分析。结果:全口义齿初戴组,其颞肌与咬肌的电位幅值低于常戴组,两者有显著性差异(左颞肌P<0.05,双侧咬肌P<0.05);双侧咬肌肌电面积,初戴组大于常戴组(P<0.05),咀嚼肌不对称指数无显著性差异(P>0.05)。结论:初戴全口义齿2周与戴用全口义齿3个月以上患者比较,咀嚼肌活动有显著差异;初戴者,其咀嚼功能恢复未能达到相应程度。 PURPOSE: This study was aimed to analyze the relationship between the periods of wearing time of full denture and function of mastication in edentulous patients. METHODS: Electromyogram (EMG) was done at an initial time of wearing full denture for 30 patients (Group A) and at an interval of wearing full denture for more than 3 months for 32 patients (Group B). EMG activities were recorded for 2 pairs of muscles (anterior temporalis, masseter) by means of Medelec Synergy Electromyography. Student's t test was used for statistical analysis. RESULTS: EMG amplitude of Group A was significantly lower than that of Group B (left anterior temporalis P〈0.05, bilateral masseter P〈0.05). Group A has larger area than Group B (P〈0.05); No significant difference was found in asymmetry index between Group A and Group B (P〉0.05). CONCLUSION: The function of mastication in patients who wore full denture for short time has not been achieved as expected.
出处 《上海口腔医学》 CAS CSCD 2006年第5期466-468,共3页 Shanghai Journal of Stomatology
基金 上海市重点学科(特色学科)建设项目(T0202)~~
关键词 全口义齿 颞肌 咬肌 肌电图 Full denture Temporalis muscle Masseter EMG
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