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目的观察-6°头低位卧床(HDBR)对女性志愿者最大咬合力及咬合速度的影响。方法应用T-ScanII咬合力分析系统记录20名女性志愿者在4个时间点:卧床前、卧床第4天、第10天及恢复期第7天的最大咬合力以及达到最大咬合力所需时间,并对所得数据进行配对t检验分析。结果女性志愿者最大咬合力在卧床后第4天([2219.14±895.19)N]与基线水平([2519.41±1041.72)N]相比有显著性降低(P<0.05),之后两个时间点与基线无显著性差异;达到最大咬合力需要的时间在卧床后第4天、第10天与基线水平有显著性增加(P<0.05),恢复后无显著性差异。结论 -6°头低位卧床初期对女性志愿者的最大咬合力有一定影响,对志愿者咬合速度有显著影响,确切机理尚需要进一步研究。
Objective To observe the effect of -6 ° head-down bed (HDBR) on maximal bite force and bite speed of female volunteers. Methods T-ScanII bite force analysis system was used to record the maximum bite force of 20 female volunteers at 4 time points: before bed rest, on the 4th day of bed rest, on the 10th day and on the 7th day of convalescence, and the time required to reach the maximum bite force , And paired t-test analysis of the data obtained. Results The maximal bite force of female volunteers was significantly lower (P <0.05) on the fourth day after bed rest ([2219.14 ± 895.19] N] compared with the baseline level ([2519.41 ± 1041.72] N] There was no significant difference between baseline and baseline. The time needed to reach maximal bite force was significantly increased from baseline (P <0.05) on day 4 and 10 after bed rest, with no significant difference after recovery. Conclusion The -6 ° head-down bed early has a certain impact on the maximal bite force of female volunteers, and has a significant effect on the bite speed of volunteers. The exact mechanism still needs further study.