Effect of the Shortened Dental Arch on movement smoothness during chewing

这项研究的目的是确定食物推注位置的实验差异是否会对咀嚼效率和下颌运动平稳性产生影响。通过用加速度计测量用力代价来评价下颌运动平稳性，并记录咀嚼双色口香糖时的加速度，以此来评估咀嚼效率。咀嚼是在两种情况下进行的：后咀嚼和前咀嚼。用Wilcoxon符号秩次检验(双尾)比较前牙和后牙咀嚼的挺举成本和咀嚼效率。受试者在前咀嚼时的咀嚼效率明显低于后咀嚼时(P=0.0051)。开口期(P=0.25)和闭合期(P=0.42)前后的急救费用差异无统计学意义。

The aim of this study was to determine whether experimental differences in food bolus location had an effect on masticatory efficiency and jaw movement smoothness. Jaw movement smoothness was evaluated by measuring jerk-cost with an accelerometer, and acceleration was recorded during chewing on two-colour chewing gum, which was used to assessed masticatory efficiency. Chewing was performed under two conditions: posterior chewing and anterior chewing. Jerk-cost and masticatory efficiency were compared between anterior and posterior chewing with the Wilcoxon signed rank test (two-tailed). Subjects chewed significantly less efficiently during anterior chewing than during posterior chewing (P =0.0051). There was no significant difference in jerk-cost between anterior and posterior conditions in the opening phase (P = 0.25), or closing phase (P = 0.42).