Wilding R J, Lewin A
Department of Oral Biology, Faculty of Dentistry, University of the Western Cape, Tygerberg, Republic of South Africa.
Arch Oral Biol. 1991;36(1):65-75. doi: 10.1016/0003-9969(91)90055-y.
A method of analysing jaw movements was developed by converting jaw displacements into a matrix of frequency distributions. Low frequencies were first filtered out; then quartiles and modes were used to describe the remaining core. Eight different types of measures (variables) were developed to describe the proportions and density of a core of movement. These variables were repeatable at successive recording sessions, yet accurate enough to reveal differences in chewing patterns between right- and left-sided chewing. All eight variables of jaw displacement were required to discriminate between the chewing sides of 15 subjects. A statistical model was developed to express the principal components of jaw movement. The first component consisted of variables that expressed the shape of the chewing cycle; the second, its distribution about the midline; the third, the prevalence of a bimodal pathway in the sagittal plane. There was a wide variation in patterns of chewing movements, which appear to be consistent with normal masticatory function. A multivariate model appears to be required to describe chewing movements.
一种分析下颌运动的方法是通过将下颌位移转换为频率分布矩阵来实现的。首先滤除低频；然后使用四分位数和众数来描述剩余的核心部分。开发了八种不同类型的测量方法（变量）来描述运动核心的比例和密度。这些变量在连续的记录过程中是可重复的，并且足够精确以揭示右侧咀嚼和左侧咀嚼之间咀嚼模式的差异。需要所有八个下颌位移变量来区分15名受试者的咀嚼侧。开发了一个统计模型来表达下颌运动的主要成分。第一个成分由表示咀嚼周期形状的变量组成；第二个成分表示其关于中线的分布；第三个成分表示矢状面中双峰路径的普遍性。咀嚼运动模式存在很大差异，这似乎与正常咀嚼功能一致。似乎需要一个多变量模型来描述咀嚼运动。
