Technical Note: Dental Microwear Textures of "Phase I" and "Phase II" Facets
Technical Note: Dental Microwear Textures of "Phase I" and "Phase II" Facets
复制标题
DOI：
10.1002/ajpa.20928
复制
发表时间：
2008-12-01
影响因子：
2.8
通讯作者：
Ungar, Peter S.
中科院分区：
文献类型：
--
作者：
Krueger, Kristin L.;Scott, Jessica R.;Ungar, Peter S.
传统上，咀嚼的动力冲程分为两个部分，一个在正中咬合之前，另一个在正中咬合之后--分别为“第一阶段”和“第二阶段”。最近对灵长类动物咀嚼的研究对第二阶段在食物加工中的作用提出了质疑，因为他们发现在正中咬合后几乎没有肌肉活动或伴随的骨应变。也就是说，许多研究人员今天期待第二阶段方面将饮食与牙齿微磨损模式联系起来。这表明需要重新评估第一阶段刻面上的微磨损模式。在这里，我们使用纹理分析，比较和对比微磨损的方面代表两个阶段在三个灵长类动物物种不同的饮食（Alouatta palliata，Cebus apella，和Lophocebus albigena）。结果重申，第二阶段方面的微磨损模式更好地区分类群与不同的饮食比那些第一阶段方面。此外，微磨损纹理之间的小面类型为一个给定的分类群本身可能反映饮食的差异。提出了一些可能的解释小平面类型之间的微磨损纹理的差异。美国物理人类学杂志137：485-490，2008年。(C)2008 Wiley-Liss，Inc.
The power stroke of mastication has been traditionally divided into two parts, one which precedes centric occlusion, and the other which follows it-"Phase I" and "Phase II," respectively. Recent studies of primate mastication have called into question the role of Phase II in food processing, as they have found little muscle activity or accompanying bone strain following centric occlusion. That said, many researchers today look to Phase II facets to relate diet to patterns of dental microwear. This suggests the need to reevaluate microwear patterns on Phase I facets. Here we use texture analysis to compare and contrast microwear on facets representing both phases in three primate species with differing diets (Alouatta palliata, Cebus apella, and Lophocebus albigena). Results reaffirm that microwear patterns on Phase II facets better distinguish taxa with differing diets than do those on Phase I facets. Further, differences in microwear textures between facet types for a given taxon may themselves reflect diet. Some possible explanations for differences in microwear textures between facet types are proposed. Am J Phys Anthropol 137:485-490, 2008. (C) 2008 Wiley-Liss, Inc.