Ⅲ类错牙合患者的咬合与肌电研究<br />-《中国美容医学》

文章信息/Info

Title:: Occlusal and Surface Electromyograph Character of Patients with Anterior Crossbite

Keywords:: Key words: Class Ⅲ malocclusion; T-scan; surface electromyograph; mandibular postural position; intercuspal position; protrusive edge-to-edge contact position

摘要:: [摘要]目的：探讨Ⅲ类错牙合畸形对咬合与肌电的影响。方法：使用T-SCAN Ⅲ与肌电仪对16名Ⅲ类错牙合畸形患者进行检测，
其中男7例，女9例，平均年龄（15.59±2.51）岁，采集患者在姿势位、牙尖交错位（ICP）最大紧咬、前伸切对切最大紧咬时
的咬合与肌电情况。结果：Ⅲ类患者在姿势位时的颞肌、咬肌肌电高于对照组（P ＜0.05），切对切最大紧咬时低于对照组
（P ＜0.05），ICP最大紧咬时与对照组无统计学差异（P ＞0.05）。结论：Ⅲ类错牙合畸形会导致患者咀嚼肌肌电发生异常。

Abstract:: Abstract: Objective The purpose of this study was to investigate the occlusion and masticatory muscles myoelectricity of
patients with Class Ⅲ malocclusion. Methods All 16 patients were diagnosed as Class Ⅲ malocclusion. T-scan Ⅲ bite
analysis system and BioEMG Ⅲ electromyographic recording system were used to test the changes of the occlusion and
myoelectricity in masseter muscle and temporal muscle during mandibular postural position , maximal voluntary clenching
(MVC) in the maximum intercuspal position (ICP), protrusive edge-to-edge contact position (Pro). Results Compared to the
control group, the myoelectricity of Class Ⅲ patients was higher in masseter muscle and temporal muscle during mandibular
postural position ,maximal voluntary clenching (MVC) in the protrusive edge-to-edge contact position (Pro) (P ＜0.05),but
was no significance in the maximum intercuspal position (ICP). Conclusion Class Ⅲmalocclusion can cause the abnormal
myoelectricity of masticatory muscles.