Morphological variation of the deciduous second molars in the Baka Pygmies

Abstract The Baka Pygmies are known for their short stature resulting from a reduced growth rate during infancy. They are peculiar also for their teeth erupt earlier than in any other African population, and their posterior dentition is larger than in non-Pygmy populations. However, the Baka’s denta...

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Autores principales:	Petra G. Šimková, Gerhard W. Weber, Fernando V. Ramirez Rozzi, Lotfi Slimani, Jérémy Sadoine, Cinzia Fornai
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8dcc6e101b704d14a7d73647b11201d1
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spelling	oai:doaj.org-article:8dcc6e101b704d14a7d73647b11201d12021-12-02T16:27:54ZMorphological variation of the deciduous second molars in the Baka Pygmies10.1038/s41598-021-95524-32045-2322https://doaj.org/article/8dcc6e101b704d14a7d73647b11201d12021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95524-3https://doaj.org/toc/2045-2322Abstract The Baka Pygmies are known for their short stature resulting from a reduced growth rate during infancy. They are peculiar also for their teeth erupt earlier than in any other African population, and their posterior dentition is larger than in non-Pygmy populations. However, the Baka’s dental morphology, like several other aspects of their biology, is still understudied. Here, we explore the variation of the Baka’s deciduous upper and lower second molars (dm2s) in comparison to a geographically heterogeneous human sample by means of 3D geometric morphometrics and analysis of dental traits. Our results show that the different populations largely overlap based on the shape of their dm2s, especially the lower ones. Their distal region and the height of the dentinal crown differ the most, with the Baka showing the most extreme range of variation. Upper and lower dm2s covary to a great extent (RV = 0.82). The Baka’s and South Americans’ dm2s were confirmed among the largest in our sample. Despite the Baka’s unique growth pattern, long-lasting isolation, and extreme dental variation, it is not possible to distinguish them from other populations based on their dm2s’ morphology only.Petra G. ŠimkováGerhard W. WeberFernando V. Ramirez RozziLotfi SlimaniJérémy SadoineCinzia FornaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Petra G. Šimková Gerhard W. Weber Fernando V. Ramirez Rozzi Lotfi Slimani Jérémy Sadoine Cinzia Fornai Morphological variation of the deciduous second molars in the Baka Pygmies
description	Abstract The Baka Pygmies are known for their short stature resulting from a reduced growth rate during infancy. They are peculiar also for their teeth erupt earlier than in any other African population, and their posterior dentition is larger than in non-Pygmy populations. However, the Baka’s dental morphology, like several other aspects of their biology, is still understudied. Here, we explore the variation of the Baka’s deciduous upper and lower second molars (dm2s) in comparison to a geographically heterogeneous human sample by means of 3D geometric morphometrics and analysis of dental traits. Our results show that the different populations largely overlap based on the shape of their dm2s, especially the lower ones. Their distal region and the height of the dentinal crown differ the most, with the Baka showing the most extreme range of variation. Upper and lower dm2s covary to a great extent (RV = 0.82). The Baka’s and South Americans’ dm2s were confirmed among the largest in our sample. Despite the Baka’s unique growth pattern, long-lasting isolation, and extreme dental variation, it is not possible to distinguish them from other populations based on their dm2s’ morphology only.
format	article
author	Petra G. Šimková Gerhard W. Weber Fernando V. Ramirez Rozzi Lotfi Slimani Jérémy Sadoine Cinzia Fornai
author_facet	Petra G. Šimková Gerhard W. Weber Fernando V. Ramirez Rozzi Lotfi Slimani Jérémy Sadoine Cinzia Fornai
author_sort	Petra G. Šimková
title	Morphological variation of the deciduous second molars in the Baka Pygmies
title_short	Morphological variation of the deciduous second molars in the Baka Pygmies
title_full	Morphological variation of the deciduous second molars in the Baka Pygmies
title_fullStr	Morphological variation of the deciduous second molars in the Baka Pygmies
title_full_unstemmed	Morphological variation of the deciduous second molars in the Baka Pygmies
title_sort	morphological variation of the deciduous second molars in the baka pygmies
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8dcc6e101b704d14a7d73647b11201d1
work_keys_str_mv	AT petragsimkova morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies AT gerhardwweber morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies AT fernandovramirezrozzi morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies AT lotfislimani morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies AT jeremysadoine morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies AT cinziafornai morphologicalvariationofthedeciduoussecondmolarsinthebakapygmies
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Morphological variation of the deciduous second molars in the Baka Pygmies

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