Rajaona Z J, Woda A, Le Jeune M
Laboratoire de Physiologie Orofaciale, UER d'Odontologie, Clermont-Ferrand.
J Biol Buccale. 1987 Sep;15(3):153-8.
The analysis of the microscopic appearance of the dental wear facets in contemporary european subjects has been conducted using the replica method. It showed the presence of numerous striae running in various directions. The angle of each stria with the sagittal plane was measured: 1540 angle values were recorded on 6 facet types belonging to 3 groups of teeth. Statistical analysis showed that the striae distribution on the various facets studied was not random. The facets of the palatal edges and facets of the upper central incisors showed mainly parasagittal striae indicating propelling movements. The striae of the wear facets of the canine tips showed no definite direction. The palatal facets of canines as well as the working and non-working facets of the molars showed 2 groups of striae oriented obliquely, forward and inside and also forward and outside. The molar working facets also had parasagittal striae. The significance of the 2 groups of oblique striae is discussed in relation to the occlusal kinematic during mastication.
利用复型法对当代欧洲受试者牙齿磨损小平面的微观外观进行了分析。结果显示存在许多向不同方向延伸的条纹。测量了每条条纹与矢状面的夹角：在属于3组牙齿的6种小平面类型上记录了1540个角度值。统计分析表明，在所研究的不同小平面上条纹的分布并非随机。腭边缘小平面和上颌中切牙的小平面主要显示出指示推进运动的近矢状条纹。犬齿尖磨损小平面的条纹没有明确的方向。犬齿的腭小平面以及磨牙的工作和非工作小平面显示出两组倾斜的条纹，分别向前和向内以及向前和向外。磨牙工作小平面也有近矢状条纹。结合咀嚼过程中的咬合运动学对两组倾斜条纹的意义进行了讨论。
