Dissertation Research: A Cross-Sectional Study of Dental Development in Chimpanzees of Known Age and Sex

论文研究：已知年龄和性别黑猩猩牙齿发育的横断面研究

• 批准号: 9016088
• 负责人: Glenn Conroy
• 金额: $ 1.19万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-11-15 至 1993-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016088&HistoricalAwards=false
• 关键词: Dissertation; Research; Cross; Sectional; Study

The rate and pattern ofdental development in early hominids is a focus of controversy in current research in physical anthropology. This controversy is part of the larger question of whether developmental periods in early hominids can be characterized as more "humanlike", more "apelike", or distinct from either. The prolonged developmental periods characteristic of modern humans have been emphasized in many scenarios concerning the origin of various human physical, cultural, and behavioral traits. However, recent research suggests that early than modern humans, comparable to that of modern apes. If so, brains, tool use, and social organization, will be affected. Rates of human dental development are well known, but existing standards of ape dental development are inadequate since the sample size is small, they are not from individuals of known chronological age, and radiographic information on the anterior dentition is lacking. The objective of this study is to document the pattern and timing of deciduous and permanent tooth crown and root formation in a cross-sectional sample of living chimpanzees of known age and sex in order to provide baseline data for comparison with human and fossil hominid samples.

早期古人类牙齿发育的速度和模式是目前体质人类学研究中争论的焦点。这个争论是早期原始人的发育阶段是否可以被描述为更“像人”，更“像猿”，或者两者都不同的更大问题的一部分。在许多关于人类各种生理、文化和行为特征的起源的设想中，都强调了现代人漫长的发育时期的特征。然而，最近的研究表明，早于现代人类，堪比现代猿类。如果是这样，大脑、工具的使用和社会组织都会受到影响。人类牙齿发育的速度是众所周知的，但现有的类人猿牙齿发育的标准是不充分的，因为样本量小，它们不是来自已知的实足年龄的个体，并且缺乏前牙列的放射学信息。本研究的目的是记录已知年龄和性别的活黑猩猩的横截面样本中乳牙和恒牙冠和牙根形成的模式和时间，以便为与人类和原始人类化石样本的比较提供基线数据。