A STUDY ON RELATIONSHIP BETWEEN STOMATOGNATHIC SYSTEM AND SPORTS PERFORMANCE

在这项研究中，我们调查了口颌系统（包括牙齿咬合功能）和全身状况（包括骨密度）之间的关系，以及口腔保护器对提高肌肉力量的有效性。19名男性运动员作为志愿者参与研究。测量了口颌系统的以下因素：咬合力、咬合力值、下颌角和下颌体长度。多元相关分析显示，下颌体长度与骨密度呈显著正相关（p<0.01），而骨密度与咬合力无相关性。戴护齿器后的平均咬合力水平比戴护齿器前大。戴护齿器与不戴护齿器组比目鱼肌H反射有显著性差异。提示：1）骨密度应考虑口颌系统（尤其是下颌体长度）的影响; 2）戴护齿器咬合可增加等长肌力。

In this study, we have investigated the relationship between stomatognathic system(including dental occlusal function) and systemic condition(including bone mineral density), and also the usefulness of mouth-protector for elevation of the muscle strength. Nineteen male athletes were participated as volunteer subjects. The following factors of the stomatognathic system were measured ; biting force, biting force valance, gonial angle, and corpus mandibular length. To analyze multiple correlation, there were significant positive correlation (p<O.O1) between corpus mandibular length and bone mineral density, but no correlation between bone mineral density and biting force were observed. The mean occlusal force level after wearing the fitted mouth-protector was greater than before. Significant differences were found between with and without mouth protectors in soleus H-reflex. These data suggest that 1) stomatognathic system (especially corpus mandibular length) should be considered in bone mineral density ; 2) the isometric muscle strength would be increased by biting with the fitted mouth-protector.