首页> 美国政府科技报告 >Effects on G Tolerance While Biting Down on a Mandibular Orthopedic RepositioningAppliance (MORA) Levels
【24h】

Effects on G Tolerance While Biting Down on a Mandibular Orthopedic RepositioningAppliance (MORA) Levels

机译:下颌骨矫形重建(mORa)水平对G耐受性的影响

获取原文

摘要

Biting down against a Mandibular Orthopedic Repositioning Appliance (MORA) thatproperly aligns the temporo mandibular joint (TMJ) requires voluntary contraction of the masseter and temporal's muscles. The purpose of this study was to evaluate the effects of mouthpieces by a dentist qualified in TMJ alignment. Non-invasive PB, ECG, and facial EMG were -recorded at 1 G during isometric straining in 2 sessions of 2 strains with biting and 2 strains without biting. Using no anti-G suit, subjects were then exposed to sessions of 0.5 Gz increasing 20 second G plateaus on the WPAFB Dynamic Environment Simulator (Human centrifuge) until loss of peripheral vision. Seven physiological variables were recorded including facial EMG, ear pulse, and transcranial doppler signals of cerebral artery flow. G tolerance was recorded for 3 exposures using the MORA and 3 without. The resulting EMG and RMS EMG recordings indicated that subjects were not maximally contracting the involved muscles during biting and that muscle fatigue did not occur. Using the MORA resulted in a 0.3 Gz mean increase in tolerance compared with not using the MORA (p=0.0345).

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号