Safe Casting and Reliable Cusp Reconstruction Assisted by Micro-Computed Tomographic Scans of Fossil Teeth

doi:10.1002/ar.24047

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	Safe Casting and Reliable Cusp Reconstruction Assisted by Micro-Computed Tomographic Scans of Fossil Teeth
	O'Hara, Mackie C.1; Le Cabec, Adeline 2; Xing, Song 3,4; Skinner, Mark F.5; Guatelli-Steinberg, Debbie 1
刊名	ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
	2019-09-01
卷号	302 期号:9 页码:1516-1535
关键词	dental replicas wear fragile specimens damaged specimens
ISSN号	1932-8486
DOI	10.1002/ar.24047
英文摘要	Dental replicas are frequently utilized in paleoanthropological studies of perikymata and enamel hypoplasia. However, fossil teeth are often fragile and worn, causing two problems: (1) the risk of damage by removing enamel fragments when impression-making material is separated from the fossil tooth surface, and (2) the need to reconstruct worn portions of the crown to assess perikymata number, distribution, and hypoplasia timing. This study presents the advantages of mu CT data of canines and lateral incisors for (1) detecting cracks along the enamel-dentine junction (EDJ) which could cause damage when casting, and (2) reliably and non-destructively reconstructing worn or broken cusps. Fragile teeth of Homo naledi, Miocene, and Pleistocene specimens were mu CT-scanned: 2D virtual sections and 3D models allowed for inspecting crack pattern beyond the external surface and 2D virtual sections were used to digitally reconstruct cusp tips (only Homo naledi). Micro-CT scans allowed cracks running along the EDJ and communicating with radial cracks in the enamel to be identified prior to casting. Cusp reconstructions using mu CT data were conducted as precisely as when using thin-sections or photographs, and with high intra- and inter-observer agreement, while preserving the original specimen and affording numerous planes of virtual section. When available, mu CT data should be inspected prior to tooth casting to exclude teeth that show a pattern of cracks that could lead to damage. Virtual sections allow for accessible, reliable, and non-destructive cusp reconstructions that may be used for developmental (e.g., perikymata and enamel hypoplasia) or enamel thickness studies. Anat Rec, 302:1516-1535, 2019. (c) 2018 American Association for Anatomy
资助项目	NSF Foundation Graduate Research Fellowship Program[DGE-1343012] ; Max-Planck-Institut fur Evolutionare Anthropologie ; National Science Foundation[DGE-1343012] ; NSF Foundation Graduate Research Fellowship Program Grant[DGE-1343012] ; Ohio State University ; Wenner-Gren Foundation
WOS关键词	ENAMEL THICKNESS ; DENTAL ENAMEL ; PRESERVATION ; REPLICATION ; NEANDERTHAL ; MORPHOLOGY ; HOMO
WOS研究方向	Anatomy & Morphology
语种	英语
出版者	WILEY
WOS记录号	WOS:000478937100004
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/9969]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	O'Hara, Mackie C.; Le Cabec, Adeline
作者单位	1.Ohio State Univ, Dept Anthropol, 4034 Smith Lab 174 W,18th Ave, Columbus, OH 43210 USA 2.Max Planck Inst Evolutionary Anthropol, Dept Human Evolut, Deutsch Pl 6, D-04103 Leipzig, Germany 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China 5.Univ York, Dept Archaeol, York YO1 7EP, N Yorkshire, England
推荐引用方式 GB/T 7714	O'Hara, Mackie C.,Le Cabec, Adeline,Xing, Song,et al. Safe Casting and Reliable Cusp Reconstruction Assisted by Micro-Computed Tomographic Scans of Fossil Teeth[J]. ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY,2019,302(9):1516-1535.
APA	O'Hara, Mackie C.,Le Cabec, Adeline,Xing, Song,Skinner, Mark F.,&Guatelli-Steinberg, Debbie.(2019).Safe Casting and Reliable Cusp Reconstruction Assisted by Micro-Computed Tomographic Scans of Fossil Teeth.ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY,302(9),1516-1535.
MLA	O'Hara, Mackie C.,et al."Safe Casting and Reliable Cusp Reconstruction Assisted by Micro-Computed Tomographic Scans of Fossil Teeth".ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY 302.9(2019):1516-1535.