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  Enamel thickness variation in the deciduous dentition of extant large-bodied hominoids

Ortiz, A., Schander-Triplett, K., Bailey, S. E., Skinner, M. M., Hublin, J.-J., & Schwartz, G. T. (2020). Enamel thickness variation in the deciduous dentition of extant large-bodied hominoids. American Journal of Physical Anthropology, 173(3), 500-513. doi:10.1002/ajpa.24106.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0006-DF77-A 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000C-02A0-C
資料種別: 学術論文

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 作成者:
Ortiz, Alejandra, 著者
Schander-Triplett, Katherine, 著者
Bailey, Shara E.1, 著者                 
Skinner, Matthew M.1, 著者                 
Hublin, Jean-Jacques1, 著者                 
Schwartz, Gary T., 著者
所属:
1Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Max Planck Society, ou_1497673              

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キーワード: average enamel thickness, deciduous premolars, great apes, humans, relative enamel thickness
 要旨: Abstract Objectives Enamel thickness features prominently in hominoid evolutionary studies. To date, however, studies of enamel thickness in humans, great apes, and their fossil relatives have focused on the permanent molar row. Comparatively little research effort has been devoted to tissue proportions within deciduous teeth. Here we attempt to fill this gap by documenting enamel thickness variation in the deciduous dentition of extant large-bodied hominoids. Materials and methods We used microcomputed tomography to image dental tissues in 80 maxillary and 78 mandibular deciduous premolars of Homo sapiens, Pan troglodytes, Gorilla, and Pongo. Two-dimensional virtual sections were created from the image volumes to quantify average (AET) and relative (RET) enamel thickness, as well as its distribution across the crown. Results Our results reveal no significant differences in enamel thickness among the great apes. Unlike the pattern present in permanent molars, Pongo does not stand out as having relatively thicker-enameled deciduous premolars than P. troglodytes and Gorilla. Humans, on the other hand, possess significantly thicker deciduous premolar enamel in comparison to great apes. Following expectations from masticatory biomechanics, we also find that the “functional” side (protocone, protoconid) of deciduous premolars generally possesses thicker enamel than the “nonfunctional” side. Discussion Our study lends empirical support to anecdotal observations that patterns of AET and RET observed for permanent molars of large-bodied apes do not apply to deciduous premolars. By documenting enamel thickness variation in hominoid deciduous teeth, this study provides the comparative context to interpret rates and patterns of wear of deciduous teeth and their utility in life history reconstructions.

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言語: eng - English
 日付: 2020-08-072020-11
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり
 識別子(DOI, ISBNなど): DOI: 10.1002/ajpa.24106
 学位: -

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出版物 1

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出版物名: American Journal of Physical Anthropology
種別: 学術雑誌
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出版社, 出版地: -
ページ: - 巻号: 173 (3) 通巻号: - 開始・終了ページ: 500 - 513 識別子(ISBN, ISSN, DOIなど): -