A geometric morphometric approach to the study of variation of shovel‐shaped incisors

Bibliographic Data

ID8317081
AuthorsDelphine Carayon (0000-0002-0274-3065, UMR 5288 CNRS Université Toulouse III—Paul Sabatier Toulouse France, corresponding author), Kaustubh Adhikari (0000-0001-5825-4191, Department of Genetics, Evolution and Environment, and UCL Genetics Institute University College London London UK), Paul Monsarrat (0000-0002-5473-6035, Faculté d'Odontologie Université Toulouse III—Paul Sabatier Toulouse France), Jean Dumoncel (0000-0003-0789-7458, UMR 5288 CNRS Université Toulouse III—Paul Sabatier Toulouse France), J Braga (0000-0002-8483-076X, Centre National de la Recherche Scientifique), Benjamin Duployer (0000-0002-8304-5591, Centre Inter‐universitaire de Recherche et d'Ingénierie des Matériaux, UMR 5085 CNRS Université de Toulouse III—Paul Sabatier Toulouse France), M Delgado (0000-0001-6221-1186, Consejo Nacional de Investigaciones Científicas y Técnicas), Macarena Fuentes‐guajardo (0000-0002-2486-1628, Department of Genetics, Evolution and Environment, and UCL Genetics Institute University College London London UK), Frikkie De Beer (0000-0001-9810-6038, Radiation Science Department South African Nuclear Energy Corporation (Necsa) Pelindaba South Africa), Jakobus W Hoffman (Radiation Science Department South African Nuclear Energy Corporation (Necsa) Pelindaba South Africa), Jakobus Hoffmann (0000-0002-8206-3966, South African Nuclear Energy Corporation (South Africa)), Anna C Oettlé (0000-0002-5665-6581, Department of Anatomy University of Pretoria South Africa), Richard Donat (UMR 5288 CNRS Université Toulouse III—Paul Sabatier Toulouse France), L Pan (0000-0003-1164-0364, Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and Paleoanthropology Beijing China), Andrés Ruiz‐linare (0000-0001-8372-1011, Aix-Marseille Université), Andres Ruiz‐Linares (Department of Genetics, Evolution and Environment, and UCL Genetics Institute University College London London UK), Christophe Tenailleau (0000-0001-5935-9745, Centre Inter‐universitaire de Recherche et d'Ingénierie des Matériaux, UMR 5085 CNRS Université de Toulouse III—Paul Sabatier Toulouse France), Frédéric Vaysse (0009-0001-3229-7932, UMR 5288 CNRS Université Toulouse III—Paul Sabatier Toulouse France), Rémi Esclassan (0000-0002-6605-9967, UMR 5288 CNRS Université Toulouse III—Paul Sabatier Toulouse France), C Zanolli (0000-0002-5617-1613, Centre National de la Recherche Scientifique)
Year2019
Volume168
Issue1
Pages229-241
Publication date2019-01-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueAmerican Journal of Physical Anthropology (JOURNAL)
Journal identifiersISSN: 0002-9483 • E-ISSN: 1096-8644
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ajpa.23709
PMID30267417
OpenAlexW2893097664
LanguageEN
Citations received4
References cited48

OBJECTIVES: The scoring and analysis of dental nonmetric traits are predominantly accomplished by using the Arizona State University Dental Anthropology System (ASUDAS), a standard protocol based on strict definitions and three-dimensional dental plaques. However, visual scoring, even when controlled by strict definitions of features, visual reference, and the experience of the observer, includes an unavoidable part of subjectivity. In this methodological contribution, we propose a new quantitative geometric morphometric approach to quickly and efficiently assess the variation of shoveling in modern human maxillary central incisors (UI1). MATERIALS AND METHODS: We analyzed 87 modern human UI1s by means of virtual imaging and the ASU-UI1 dental plaque grades using geometric morphometrics by placing semilandmarks on the labial crown aspect. The modern human sample was composed of individuals from Europe, Africa, and Asia and included representatives of all seven grades defined by the ASUDAS method. RESULTS: Our results highlighted some limitations in the use of the current UI1 ASUDAS plaque, indicating that it did not necessarily represent an objective gradient of expression of a nonmetric tooth feature. Rating of shoveling tended to be more prone to intra- and interobserver bias for the highest grades. In addition, our analyses suggest that the observers were strongly influenced by the depth of the lingual crown aspect when assessing the shoveling. DISCUSSION: In this context, our results provide a reliable and reproducible framework reinforced by statistical results supporting the fact that open scale numerical measurements can complement the ASUDAS method

Biology · Complement (music) · Computer vision · Context (archaeology) · Artificial Intelligence · Computer Science · Forensic Anthropology and Bioarchaeology Studies · Medicine · Morphological variations and asymmetry · Orthodontics · Orthodontics and Dentofacial Orthopedics

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