The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern

Gregorio Oxilia; E. Bartolini; S. Martini; Andrea  Papini; M. Boggioni; Grant Clement Townsend; John Kaidonis; Luca Fiorenza; E. Cristiani; Ottmar Kullmer; Jacopo Moggi-Cecchi; Stefano Benazzi

Abstract

Exact symmetry and perfect balance between opposite jaw halves as well as between antagonistic teeth is not frequently observed in natural masticatory systems. Research results show that asymmetry in our body, skull and jaws is related to non-genetic environmental and individual ontogenetic factors. However, modern humans exhibit increased variability in tooth positions and asymmetry compared to non-human primates and most fossil hominins. The present work investigates the relationship between dental macrowear patterns and alveolar inclinations on a sample of complete maxillary and mandibular 3D models of dental arches from 19 young and adult Yuendumu Aboriginal individuals. The analysis was carried out on first molars (M1) from all quadrants. Virtual models were oriented identifying a standard plane for each jaw. Occlusal fingerprint analysis was used to obtain M1 macrowear patterns, and 2D cross-sectional geometric analysis of the jaws was carried out to investigate asymmetry in dental arches. Asymmetry observed in the present sample is highly variable on both arches, and it is associated with differences in the inclination of upper M1 crowns. Wear facet position on opposite teeth also reflects differences in inclination of the molars between left and right sides. Our results suggest that overall asymmetry in the masticatory apparatus of modern humans affects contact between opposing teeth to the extent of heavily conditioning the observed macrowear patterns.

Original language	English
Publication status	Published - 2018
Event	Annual Meeting of the American-Association-of-Physical-Anthropologists 2018 - Austin, United States of America Duration: 11 Apr 2018 → 14 Apr 2018 Conference number: 87th http://physanth.org/annual-meetings/annual-meeting-2018/

Conference

Conference	Annual Meeting of the American-Association-of-Physical-Anthropologists 2018
Abbreviated title	AAPA 2018
Country/Territory	United States of America
City	Austin
Period	11/04/18 → 14/04/18
Internet address	http://physanth.org/annual-meetings/annual-meeting-2018/

Keywords

Dental anthropology
Australian aboriginal and torres strait islanders
Tooth wear
Occlusion

1 Article

The physiological linkage between molar inclination and dental macrowear pattern
Oxilia, G., Bortolini, E., Martini, S., Papini, A., Boggioni, M., Buti, L., Figus, C., Sorrentino, R., Townsend, G., Kaidonis, J., Fiorenza, L., Cristiani, E., Kullmer, O., Moggi-Cecchi, J. & Benazzi, S., Aug 2018, In: American Journal of Physical Anthropology. 166, 4, p. 941-951 11 p.
Research output: Contribution to journal › Article › Research › peer-review

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18 Citations (Scopus)

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Oxilia, G., Bartolini, E., Martini, S., Papini, A., Boggioni, M., Townsend, G. C., Kaidonis, J., Fiorenza, L., Cristiani, E., Kullmer, O., Moggi-Cecchi, J., & Benazzi, S. (2018). The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern. Abstract from Annual Meeting of the American-Association-of-Physical-Anthropologists 2018, Austin, Texas, United States of America.

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title = "The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern",

abstract = "Exact symmetry and perfect balance between opposite jaw halves as well as between antagonistic teeth is not frequently observed in natural masticatory systems. Research results show that asymmetry in our body, skull and jaws is related to non-genetic environmental and individual ontogenetic factors. However, modern humans exhibit increased variability in tooth positions and asymmetry compared to non-human primates and most fossil hominins. The present work investigates the relationship between dental macrowear patterns and alveolar inclinations on a sample of complete maxillary and mandibular 3D models of dental arches from 19 young and adult Yuendumu Aboriginal individuals. The analysis was carried out on first molars (M1) from all quadrants. Virtual models were oriented identifying a standard plane for each jaw. Occlusal fingerprint analysis was used to obtain M1 macrowear patterns, and 2D cross-sectional geometric analysis of the jaws was carried out to investigate asymmetry in dental arches. Asymmetry observed in the present sample is highly variable on both arches, and it is associated with differences in the inclination of upper M1 crowns. Wear facet position on opposite teeth also reflects differences in inclination of the molars between left and right sides. Our results suggest that overall asymmetry in the masticatory apparatus of modern humans affects contact between opposing teeth to the extent of heavily conditioning the observed macrowear patterns.",

keywords = "Dental anthropology, Australian aboriginal and torres strait islanders, Tooth wear, Occlusion",

author = "Gregorio Oxilia and E. Bartolini and S. Martini and Andrea Papini and M. Boggioni and Townsend, {Grant Clement} and John Kaidonis and Luca Fiorenza and E. Cristiani and Ottmar Kullmer and Jacopo Moggi-Cecchi and Stefano Benazzi",

year = "2018",

language = "English",

note = "Annual Meeting of the American-Association-of-Physical-Anthropologists 2018, AAPA 2018 ; Conference date: 11-04-2018 Through 14-04-2018",

url = "http://physanth.org/annual-meetings/annual-meeting-2018/",

}

Oxilia, G, Bartolini, E, Martini, S, Papini, A, Boggioni, M, Townsend, GC, Kaidonis, J, Fiorenza, L, Cristiani, E, Kullmer, O, Moggi-Cecchi, J & Benazzi, S 2018, 'The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern', Annual Meeting of the American-Association-of-Physical-Anthropologists 2018, Austin, United States of America, 11/04/18 - 14/04/18.

The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern. / Oxilia, Gregorio; Bartolini, E.; Martini, S. et al.
2018. Abstract from Annual Meeting of the American-Association-of-Physical-Anthropologists 2018, Austin, Texas, United States of America.

Research output: Contribution to conference › Abstract › peer-review

TY - CONF

T1 - The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern

AU - Oxilia, Gregorio

AU - Bartolini, E.

AU - Martini, S.

AU - Papini, Andrea

AU - Boggioni, M.

AU - Townsend, Grant Clement

AU - Kaidonis, John

AU - Fiorenza, Luca

AU - Cristiani, E.

AU - Kullmer, Ottmar

AU - Moggi-Cecchi, Jacopo

AU - Benazzi, Stefano

N1 - Conference code: 87th

PY - 2018

Y1 - 2018

N2 - Exact symmetry and perfect balance between opposite jaw halves as well as between antagonistic teeth is not frequently observed in natural masticatory systems. Research results show that asymmetry in our body, skull and jaws is related to non-genetic environmental and individual ontogenetic factors. However, modern humans exhibit increased variability in tooth positions and asymmetry compared to non-human primates and most fossil hominins. The present work investigates the relationship between dental macrowear patterns and alveolar inclinations on a sample of complete maxillary and mandibular 3D models of dental arches from 19 young and adult Yuendumu Aboriginal individuals. The analysis was carried out on first molars (M1) from all quadrants. Virtual models were oriented identifying a standard plane for each jaw. Occlusal fingerprint analysis was used to obtain M1 macrowear patterns, and 2D cross-sectional geometric analysis of the jaws was carried out to investigate asymmetry in dental arches. Asymmetry observed in the present sample is highly variable on both arches, and it is associated with differences in the inclination of upper M1 crowns. Wear facet position on opposite teeth also reflects differences in inclination of the molars between left and right sides. Our results suggest that overall asymmetry in the masticatory apparatus of modern humans affects contact between opposing teeth to the extent of heavily conditioning the observed macrowear patterns.

AB - Exact symmetry and perfect balance between opposite jaw halves as well as between antagonistic teeth is not frequently observed in natural masticatory systems. Research results show that asymmetry in our body, skull and jaws is related to non-genetic environmental and individual ontogenetic factors. However, modern humans exhibit increased variability in tooth positions and asymmetry compared to non-human primates and most fossil hominins. The present work investigates the relationship between dental macrowear patterns and alveolar inclinations on a sample of complete maxillary and mandibular 3D models of dental arches from 19 young and adult Yuendumu Aboriginal individuals. The analysis was carried out on first molars (M1) from all quadrants. Virtual models were oriented identifying a standard plane for each jaw. Occlusal fingerprint analysis was used to obtain M1 macrowear patterns, and 2D cross-sectional geometric analysis of the jaws was carried out to investigate asymmetry in dental arches. Asymmetry observed in the present sample is highly variable on both arches, and it is associated with differences in the inclination of upper M1 crowns. Wear facet position on opposite teeth also reflects differences in inclination of the molars between left and right sides. Our results suggest that overall asymmetry in the masticatory apparatus of modern humans affects contact between opposing teeth to the extent of heavily conditioning the observed macrowear patterns.

KW - Dental anthropology

KW - Australian aboriginal and torres strait islanders

KW - Tooth wear

KW - Occlusion

M3 - Abstract

T2 - Annual Meeting of the American-Association-of-Physical-Anthropologists 2018

Y2 - 11 April 2018 through 14 April 2018

ER -

The physiological linkage between dental arch asymmetry, alveolar inclination and dental macrowear pattern

Abstract

Conference

Keywords

Research output

The physiological linkage between molar inclination and dental macrowear pattern

Cite this