The effects of chewing rates on mandibular kinematics.
The effects of chewing rates on mandibular kinematics.
复制标题
咀嚼速率对下颌运动学的影响。
DOI：
10.1046/j.1365-2842.2001.00679.x
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发表时间：
2001
影响因子：
2.9
通讯作者：
Phelan,T
中科院分区：
文献类型：
--
作者：
Throckmorton,GS;Buschang,BH;Hayasaki,H;Phelan,T
本研究的目的是提供对咀嚼速度如何影响咀嚼颌运动学的基本了解。二十六名健康受试者（23·6 ± 2·5 岁）以快速（100 周期 s−1）、习惯性和慢速（50 周期 s−1）的速度咀嚼标准化的口香糖丸。用节拍器控制速率，并且每个受试者的速率顺序是随机的。光电系统独立记录头部和下巴的运动。特殊的计算机程序确定了每个受试者的代表性周期，并计算了下颌运动的各个方面。使用多级统计程序来比较三个速率之间的周期变量，估计变异性并模拟下颌运动。快速时的前后（AP）、垂直和侧向下颌偏移的最大范围明显小于习惯性或慢速时的最大范围。虽然三种速率的 3D 通路形状相似，但快速咀嚼周期的通路周长明显更短。三个速率之间的最大 AP、垂直、横向和总 3D 颌速度存在显着差异。周期持续时间和下颌偏移的周期变化在快速咀嚼期间最小，在慢速咀嚼期间最大；三种速率的最大速度的变化相似。
The purpose of this study is to provide basic understanding of how the speed of chewing affects masticatory jaw kinematics. Twenty‐six healthy subjects (23·6 ± 2·5 years of age) chewed a standardized bolus of gum at fast (100 cycles s−1), habitual and slow (50 cycles s−1) rates. The rates were controlled with a metronome and the order of rates was randomized for each subject. An optoelectrical system independently recorded head and jaw movement. Special computer programs identified representative cycles for each subject and computed various aspects of jaw movement. Multilevel statistical procedures were used to compare cycle variables among the three rates, estimate variability and model jaw movements. Maximum ranges of anteroposterior (AP), vertical and lateral jaw excursions were significantly less for the fast than the habitual or slow rates. While the shape of 3‐D pathway was similar for the three rates, the perimeter of the pathway was significantly shorter for fast chewing cycles. Maximum AP, vertical, lateral and total 3‐D jaw velocities were significantly different among the three rates. Between cycle variation in cycle duration and jaw excursion were least during fast chewing and the greatest during slow chewing; variability in maximum velocity was similar for the three rates.