咬合垂直距离与咀嚼肌肌电、咬合力关系的研究

›› 2015, Vol. 35 ›› Issue (7): 565-569.

咬合垂直距离与咀嚼肌肌电、咬合力关系的研究

温从生,刘丽,费雪芬

浙江大学附属省口腔医院

收稿日期:2014-08-26 修回日期:2015-01-31 出版日期:2015-07-28 发布日期:2015-08-04
通讯作者: 刘丽 E-mail:yjing@mail.hz.zj.cn
基金资助:
浙江省科技厅项目资助课题

Relationship between vertical dimension and bite force as well as electromyography in edentulous people

Received:2014-08-26 Revised:2015-01-31 Online:2015-07-28 Published:2015-08-04

摘要/Abstract

摘要： ［摘要］目的研究老年无牙颌患者垂直距离和咬合力、咀嚼肌肌电幅值的关系，为临床上确立正常垂直距离提供参考。方法研究对象来自浙江大学附属口腔医院就诊的10位老年无牙牙合患者，用常规法确定垂直距离，以正常咬合垂直距离为基准位(M位)，间隔0.5 mm形成13个咬合垂直距离。应用咬合力计测量患者不同垂直距离的咬合力，同时用记录双侧颞肌前束、咬肌的肌电活动，对垂直距离、咬合力和肌电进行统计研究。结果 ①无牙颌患者的咬合力与垂直距离呈正相关（P <0.05）。②标准化咬肌(NMM)和标准化颞肌前束肌电幅值（NATM）与垂直距离呈负相关（P <0.05）。③颞肌前束肌电/咬合力(ATM/BF)、咬肌肌电/咬合力(MM/BF)比值与着垂直距离呈负相关（P <0.05）。结论 ①随着垂直距离的增加，最大咬合力增大，正常咬合垂直距离并非产生最大咬合力的区域。 ②随着咬合垂直距离的增加，咬肌的肌电活动明显下降，颞肌前束的肌电活动变化则不及咬肌明显。③咬肌肌电/咬合力、颞肌前束肌电活动/咬合力比值均随着咬合垂直距离的增加而减小。④在正常咬合垂直附近有一稳定区，该区内最大咬合力、咬肌以及颞肌前束的肌电活动均不出现明显变化。

关键词: 咬合垂直距离, 最大咬合力, 标准化肌电活动

Abstract: Abstract: Objective To investigate the relationship between vertical dimension and bite force as well as electromyography (EMG) in elderly edentulous people,and to provide references for determining normal vertical dimension in clinic.Methods 10 edentulous subjects who went to the Affiliated Stomatological Hospital,College of Medicine,Zhejiang University were chosen.The normal vertical dimension was measured by conventional method.Based on the normal vertical dimension (M position),other 12 vertical dimensions were settled at every 0.5 mm.Bite force at different vertical dimensions was measured using an occlusometer,while electromyography of bilateral masseter and anterior temporal muscles were recorded by multichannel physiologic collection device.Vertical dimension,bite force and muscle activity were statistically analyzed.Results ①Bite force was positively correlated with vertical dimension (P <0.05).②Normalized masseter muscle activity (NMM) and normalized anterior temporal muscles activity (NATM) were negatively correlated with vertical dimension (P <0.05).③Masseter muscle activity/bite force (MM/BF) and anterior temporal muscles activity/bite force (ATM/BF) were negatively correlated with vertical dimension.Conclusions ①Bite force increased with the increase of vertical dimension.The normal vertical dimension wasn′t where bite force is maximal.②Masseter muscle activity decreased with the increase of occlusal vertical dimension,but the change of anterior temporal muscle activity wasn′t so apparent compared to that of masseter muscle activity.③MM/BF and ATM/BF decreased with the increase of occlusal vertical dimension.④There may be a stable area nearby the normal occlusal vertical dimension.Inside the stable area,changes of bite force,masseter muscle and anterior temporal muscle activity were not significant.

Key words: Occlusal vertical dimension, Bite force, EMG activity

中图分类号:

R783.6

温从生刘丽费雪芬. 咬合垂直距离与咀嚼肌肌电、咬合力关系的研究[J]. 口腔医学, 2015, 35(7): 565-569.

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