目的：探讨后牙重度磨耗患者咬合抬高后对咀嚼肌表面肌电反应的影响。方法：随机选取2012年1月至2014年1月在我北京航空总医院口腔诊疗中心就诊的，伴有双侧后牙重度磨耗的患者40名为受试对象，其中男性23名，女性17名，年龄40-50岁，治疗前及咬合抬高不同距离后分别进行咬肌及颞肌的肌电检查，并对结果采用多样本均数比较的单因素方差分析进行统计学处理。结果：切牙区颌间距离增加1mm时，双侧咬肌，双侧颞肌肌电值差异无统计学意义。切牙区颌间距离增加2mm时，左侧咬肌，右侧咬肌，左侧颞肌肌电值差异无统计学意义，右侧颞肌肌电值有所增加(17.08±3.27 VS 24.66±3.18， P<0.05)。切牙区颌间距离增加3mm时，除右侧咬肌肌电值差异无统计学意义外(22.35±3.14 VS 27.74±4.26， P>0.05)，左侧咬肌，左侧颞肌，右侧颞肌肌电值差异均有统计学意义。切牙区颌间距离增加4mm时，双侧咬肌，颞肌肌电值差异均有统计学意义。结论：切牙区颌间距离增加2mm时对咬肌和颞肌肌电值影响不大，切牙区颌间距离增加3mm会对咬肌和颞肌肌电值产生较大影响。%Objective: To investigate the effects of increase of vertical occlusal dimension (VOD) on the electromyo-graphic activity of masticatory muscle in patients with a serious tooth wear. Methods:Forty 40 to 50-year-old patients (23 male and 17 female) with a serious tooth wear were recruited in our department during the period from January, 2012 to Jan , 2014. Electromyographic examination on bilateral masseter and temporal muscles were performed before and after VOD in-crease. One-way ANOVA was conducted for statistical analysis. Results: No significant changes were found on elec-tromyographic values of masseter and temporal muscles on both sides after 1mm VOD increase on incisors. The elec-tromyographic values of the right temporal muscles significantly increased after 2mm VOD increase (17.08 ±3.27 VS 24.66±3.18, P<0.05), the others remained unchanged. The electromyographic values of masseter on the right side did not significantly change after 3 mm VOD increase (22.35 ±3.14 VS 27.74 ±4.26, P>0.05), the others increased significantly. Electromyographic values of masseter and temporal muscle on both sides increased significantly after 4mm VOD increase. Conclusion:A 2mm increase of vertical occlusal dimension did not show significant effects on electromyographic activities of masticatory muscle, and a 3mm VOD increase enhances the electromyographic activities of masticatory muscle.
展开▼
