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Towle I, Krueger KL, Hernando R, Hlusko LJ. Assessing tooth wear progression in non-human primates: a longitudinal study using intraoral scanning technology. PeerJ 2024; 12:e17614. [PMID: 39006010 PMCID: PMC11244035 DOI: 10.7717/peerj.17614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 05/31/2024] [Indexed: 07/16/2024] Open
Abstract
Intraoral scanners are widely used in a clinical setting for orthodontic treatments and tooth restorations, and are also useful for assessing dental wear and pathology progression. In this study, we assess the utility of using an intraoral scanner and associated software for quantifying dental tissue loss in non-human primates. An upper and lower second molar for 31 captive hamadryas baboons (Papio hamadryas) were assessed for dental tissue loss progression, giving a total sample of 62 teeth. The animals are part of the Southwest National Primate Research Center and were all fed the same monkey-chow diet over their lifetimes. Two molds of each dentition were taken at either two- or three-year intervals, and the associated casts scanned using an intraoral scanner (Medit i700). Tissue loss was calculated in WearCompare by superimposition of the two scans followed by subtraction analysis. Four individuals had dental caries, and were assessed separately. The results demonstrate the reliability of these techniques in capturing tissue loss data, evidenced by the alignment consistency between scans, lack of erroneous tissue gain between scans, and uniformity of tissue loss patterns among individuals (e.g., functional cusps showing the highest degree of wear). The average loss per mm2 per year for all samples combined was 0.05 mm3 (0.04 mm3 for females and 0.08 mm3 for males). There was no significant difference in wear progression between upper and lower molars. Substantial variation in the amount of tissue loss among individuals was found, despite their uniform diet. These findings foster multiple avenues for future research, including the exploration of wear progression across dental crowns and arcades, correlation between different types of tissue loss (e.g., attrition, erosion, fractures, caries), interplay between tissue loss and microwear/topographic analysis, and the genetic underpinnings of tissue loss variation.
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Affiliation(s)
- Ian Towle
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
| | - Kristin L. Krueger
- Department of Anthropology, Loyola University Chicago, Chicago, IL, United States of America
| | - Raquel Hernando
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
- Institut Català de Paleoecologia Humana i Evolució Social (IPHES), Tarragona, Spain
| | - Leslea J. Hlusko
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
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Ungar PS, Van Valkenburgh B, Sokolova N, Fufachev I, Filippova V, Shklyar K, Sokolov A. Changes in dental wear and breakage in arctic foxes across space and time: Evidence for anthropogenic food subsidies? CAN J ZOOL 2022. [DOI: 10.1139/cjz-2022-0057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Increased human presence in the Arctic may affect its vulnerable ecosystems. Effects on arctic and red foxes provide notable examples. Both have been documented to take anthropogenic subsidies when available, which can change diet and ranging patterns in complex ways that can either benefit or harm populations, depending on the situation. Understanding this complexity requires new tools to study impacts of increasing human presence on endemic mammals at high latitudes. We propose that dental ecology, specifically tooth wear and breakage, can offer important clues. Based on samples of arctic foxes (Vulpes lagopus Linnaeus, 1758) trapped prior to (n = 78) and following (n = 57) rapidly growing human presence on the Yamal Peninsula, Russia, we found that foxes trapped recently in proximity to human settlement had significantly less tooth wear and breakage. This is likely explained by a dietary shift from consumption of reindeer carcasses (Rangifer tarandus Linnaeus, 1758) including bone to softer human-derived foods, especially when preferred smaller prey (e.g., West Siberian lemmings, Lemmus sibiricus Kerr, 1792 and arctic lemmings, Dicrostonyx torquatus Pallas, 1778) are unavailable. These results suggest that tooth wear can be a useful indicator of the consumption of anthropogenic foods in arctic foxes.
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Affiliation(s)
- Peter S. Ungar
- University of Arkansas Fayetteville, 3341, Department of Anthropology, Fayetteville, Arkansas, United States,
| | - Blaire Van Valkenburgh
- University of California Los Angeles, 8783, Ecology and Evolutionary Biology, Los Angeles, California, United States
| | - Natalya Sokolova
- Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, 243796, Arctic research station , Labytnangi, Yamalo-Nenets Autonomous District, Russian Federation
| | - Ivan Fufachev
- Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, 243796, Arctic Research Station, Labytnangi, Yamalo-Nenets Autonomous District, Russian Federation
| | - Violetta Filippova
- Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, 243796, Labytnangi, Yamalo-Nenets Autonomous District, Russian Federation
| | - Kirill Shklyar
- Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, 243796, Arctic research station, Labytnangi, Yamalo-Nenets Autonomous District, Russian Federation
| | - Aleksandr Sokolov
- Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences, 243796, Arctic research station, Labytnangi, Yamalo-Nenets Autonomous District, Russian Federation
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Burtt AA, DeSantis LRG. Exploring durophagy among modern gray wolves from the Greater Yellowstone Ecosystem with dental microwear texture analysis. J Zool (1987) 2022. [DOI: 10.1111/jzo.12957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Amanda A. Burtt
- Anthropology Department Indiana University Bloomington IN USA
| | - Larisa R. G. DeSantis
- Department of Biological Sciences Vanderbilt University Nashville TN USA
- Department of Earth and Environmental Sciences Vanderbilt University Nashville TN USA
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