Variability and patterning in permanent tooth size of four human ethnic groups
Variability and patterning in permanent tooth size of four human ethnic groups
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DOI：
10.1016/j.archoralbio.2008.12.003
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发表时间：
2009-12-01
影响因子：
3
通讯作者：
Smith, R. N.
中科院分区：
文献类型：
--
作者：
Brook, A. H.;Griffin, R. C.;Smith, R. N.
目的：牙齿尺寸在不同种族之间存在差异，为控制人类牙齿发育的因素提供见解。本文比较了四个民族之间的永久近远中牙冠直径突出这些群体之间的牙齿大小的模式，并认为在有关遗传和环境的influences.Methods和results的调查结果：近远中牙冠尺寸记录使用标准化的手工测量来自四个不同的人群的牙模型：中国南方人、欧洲血统的北美人、欧洲血统的现代英国人和罗马-英国人。基于双重测定的分析表明，所有研究样本的测量结果都是可靠的，精确度为0.1 mm。中国南方样本的牙齿总体上最大，而罗马-英国样本通常显示出最小的近远中牙冠尺寸（p < 0.001）。然而，现代英国样本有最大的上颌中切牙，下颌中切牙和侧切牙，下颌犬齿，而北美样本有最大的上颌第一和第二磨牙。每个类内的牙齿的变异系数的比较表明，较晚形成的牙齿显示更大的变化，在mesiodistal大小比早期形成的牙齿.Conclusion：研究样本之间观察到的牙齿大小的不同模式被认为是反映在相对贡献的遗传差异，和环境的影响，牙齿发育的四个种群之间。例如，有人提出，在罗马-不列颠人的早期生活中，主要的环境伤害，包括复发性疾病，营养不良和过量的铅摄入，导致他们后来形成的牙齿尺寸缩小和变异性更大。使用标准化的方法，近远中牙冠直径的显着差异已被证明在四个人类种族群体之间。各组之间的牙冠尺寸模式也存在明显差异，每种类型中较晚形成的牙齿通常显示出更大的尺寸变化。(C)2009爱思唯尔有限公司版权所有。
Aims: Dental dimensions vary between different ethnic groups, providing insights into the factors controlling human dental development. This paper compares permanent mesiodistal crown diameters between four ethnic groups highlighting patterns of tooth size between these groups and considers the findings in relation to genetic and environmental influences.Methods and results: Mesiodistal crown dimensions were recorded using standardised manual measurements on dental casts derived from four different human populations: Southern Chinese, North Americans of European ancestry, Modern British of European ancestry and Romano-British. Analyses based on double determinations showed that measurements in all study samples were reliable to an accuracy of 0.1 mm. The Southern Chinese sample was found to have the largest teeth overall, whereas the Romano-British sample generally displayed the smallest mesiodistal crown dimensions (p < 0.001). However, the Modern British sample had the largest maxillary central incisors, mandibular central and lateral incisors, and mandibular canines, while the North American sample had the largest maxillary first and second molars. Comparisons of coefficients of variation for teeth within each class showed that the later-forming teeth displayed greater variation in mesiodistal size than the earlier-forming teeth.Conclusion: The different patterns of tooth size observed between the study samples are thought to reflect differences in the relative contributions of genetic, and environmental influences to dental development between the four populations. For example, it is proposed that major environmental insults during the early life of Romano-Britons, including recurrent illnesses, poor nutrition and excessive lead ingestion, contributed to the reduction in size and greater variability of their later-forming teeth. Using a standardised methodology, significant differences in mesiodistal crown diameters have been demonstrated between four human ethnic groups. There were also distinct differences in the patterns of crown size between the groups, with the later-forming teeth in each type generally showing greater size variation. (C) 2009 Elsevier Ltd. All rights reserved.