正常口周肌压力的研究

The study of normal occlusion′s perioral muscle pressure

目的定量分析正常口周肌压力的分布特征，探讨口周肌压力与错畸形的相关性。方法使用作者自行设计的微型肌压力传感器及口周肌压力测试系统，测量了３０名正常者在息止颌位和吞咽运动时的口周肌压力，对测量数值进行了统计学分析。结果男性肌压力大于女性肌压力，口周肌压力与性别有相关性；口周肌压力与牙位有相关性，不同牙位的肌压力分布特征各异；吞咽运动时的肌压力大于息止颌位时肌压力，其间差异有显著性。结论牙弓内外的肌压力数值不是简单的数量上的相等；个体间肌压力没有可比性；口周肌压力与型密切相关。

Objective To measure the perioral muscle pressure, to realize the relationship between the morphology of dent, occlusion, skeleton and muscle pressure, moreover we established the measuring system and the mini pressure transducers. Methods Thirty volunteers of normal occlusions aging 18.4～20.2 years old were selected. Mini pressure transducer were bonded on the surface of the tooth. We measured the muscle pressure at rest and during swalling. The collection, handing, statistics of muscle pressure were finished automatically by the computer system. Results Normal occlusion's muscle pressure is related with sex; there isn't large variation in the intra individual, but there is great variation in the inter individual; there isn't a force balance between the buccal and lingual sides of the dentition in normal occlusion subjects. Conclusion No matter which kind of occlusion, it has its own stable character of perioral muscle pressure. The buccal and lingual sides force are not equal, the perioral muscle pressure is related with the type of occlusion.