Wear’s the problem? Examining the effect of dental wear on studies of crown morphology

2013 ◽  
pp. 535-554 ◽  
Author(s):  
Scott E. Burnett ◽  
Joel D. Irish ◽  
Michael R. Fong
Keyword(s):  
Dental Wear ◽  
Crown Morphology

Evolution of dental wear and diet during the origin of whales

Paleobiology ◽  
2011 ◽  
Vol 37 (4) ◽  
pp. 655-669 ◽  
Author(s):  
J. G. M. Thewissen ◽  
Jennifer D. Sensor ◽  
Mark T. Clementz ◽  
Sunil Bajpai
Keyword(s):  
Stable Isotopes ◽  
Evolutionary Change ◽  
Dental Morphology ◽  
Tooth Crown ◽  
Dental Wear ◽  
Masticatory Function ◽  
Crown Morphology ◽  
Morphology Changes

Dental morphology changes dramatically across the artiodactyl-cetacean transition, and it is generally assumed that this reflects the evolutionary change from herbivory and omnivory to carnivory. To test hypotheses regarding tooth function and diet, we studied size and position of wear facets on the lower molars and the stable isotopes of enamel samples. We found that nearly all investigated Eocene cetaceans had dental wear different from typical wear in ungulates and isotope values indicating that they hunted similar prey and processed it similarly. The only exception is the protocetid Babiacetus, which probably ate larger prey with harder skeletons. The closest relative of cetaceans, the raoellid artiodactyl Indohyus, had wear facets that resemble those of Eocene cetaceans more than they do facets of basal artiodactyls. This is in spite of Indohyus's tooth crown morphology, which is unlike that of cetaceans, and its herbivorous diet, as indicated by stable isotopes. This implies that the evolution of masticatory function preceded that of crown morphology and diet at the origin of cetaceans.

Evaluation of Dental Wear Patterns and Preferred Chewing Direction in Horses

2011 ◽  
Vol 31 (5-6) ◽  
pp. 287-288
Author(s):  
K. Samley ◽  
J. Brown ◽  
R. Brooks ◽  
R. Splan ◽  
C.A. Porr
Keyword(s):  
Dental Wear

scholarly journals Effect of dental wear, stabilization appliance and anterior tooth reconstruction on mandibular movements during speech

2008 ◽  
Vol 19 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Priscila de Oliveira Serrano ◽  
Fernanda Faot ◽  
Altair Antoninha Del Bel Cury ◽  
Renata Cunha Matheus Rodrigues Garcia
Keyword(s):  
Tooth Wear ◽  
Anterior Tooth ◽  
Control Group ◽  
Dental Wear ◽  
Jaw Opening ◽  
Before And After ◽  
Left And Right ◽  
The Right ◽  
Tracking Device ◽  
Mandibular Movements

This study described changes in mandibular movements during pronunciation of /m/ and /s/ sounds in Portuguese, in patients presenting dental wear before and after appliance insertion and tooth reconstruction. Subjects were divided into a control group of dentate patients and an experimental group of patients with incisal tooth wear due to bruxism. A magnetic jaw tracking device measured the jaw opening, and translations to left and right sides of the mandible during pronunciation of phonemes. Evaluations were carried out 1 week and immediately before appliance insertion; 24 h, 7, 30 and 60 days after appliance insertion; and 1 week and 1 month after tooth reconstruction. Data were submitted to two-way ANOVA, Mann-Whitney and Friedman tests (p<0.05). Jaw opening was different (p<0.05) for both sounds in all periods. The anteroposterior amplitude for /s/ showed differences immediately before and 1 month after appliance insertion (p<0.05). Lateral amplitude for the right side showed differences between groups after appliance insertion for /s/, and 1 and 2 months after appliance insertion for the /m/ (p<0.05). Volunteers with anterior tooth wear had a wider opening movement, and the movements during speech of /m/ and /s/ sounds were not changed after appliance insertion and reconstruction of teeth.

Sex Differences in Hadza Dental Wear Patterns

Human Nature ◽  
2012 ◽  
Vol 23 (3) ◽  
pp. 270-282 ◽  
Author(s):  
J. Colette Berbesque ◽  
Frank W. Marlowe ◽  
Ian Pawn ◽  
Peter Thompson ◽  
Guy Johnson ◽  
...  
Keyword(s):  
Sex Differences ◽  
Dental Wear

scholarly journals Tooth Crown Morphology in Turner and Klinefelter Syndrome Individuals from a Croatian Sample

2019 ◽  
Vol 53 (2) ◽  
pp. 106-118 ◽  
Author(s):  
Christopher Maier ◽  
Jelena Dumančić ◽  
Hrvoje Brkić ◽  
Zvonimir Kaić ◽  
Ivana Savić Pavičin ◽  
...  
Keyword(s):  
Klinefelter Syndrome ◽  
Tooth Crown ◽  
Crown Morphology

The use of gross dental wear in dietary studies of extinct lagomorphs

2010 ◽  
Vol 84 (4) ◽  
pp. 720-729 ◽  
Author(s):  
Danielle Fraser ◽  
Jessica M. Theodor
Keyword(s):  
Qualitative Analysis ◽  
Local Fauna ◽  
Dental Wear ◽  
Mammalian Herbivores ◽  
Microwear Analysis ◽  
Wear Analysis ◽  
Large Numbers ◽  
Herbivorous Mammals

Studies of paleoenvironments have commonly focused on large mammalian herbivores such as ungulates. Many localities, however, have yielded large numbers of small mammalian herbivores, including lagomorphs and rodents. These fossils represent an untapped paleoecological resource. However, the fossils are often in the form of isolated teeth, and microwear analysis cannot be used due to taphonomic alteration. As a result, we use ungulate gross dental wear as a model. The dental wear features of extant western Canadian lagomorphs are identified and used to create dietary categories that can be applied to make predictions about the diets of extinct forms. The Horse Local Fauna of the Cypress Hills Formation of Saskatchewan has yielded approximately 2,500 fossil specimens, of which nearly 300 are lagomorphs. Two leporid species (rabbits and hares) are present in the Horse Local Fauna, Palaeolagus temnodon and Megalagus brachyodon. Qualitative analysis of the gross dental wear of the lagomorphs of the Horse Local Fauna indicates that M. brachyodon was mainly folivorous and P. temnodon was primarily frugivorous, suggesting that the contemporaneous ecosystem was tree dominated. Gross dental wear analysis allows the use of small herbivores and isolated teeth in paleoecological studies. Studying the diets of small herbivorous mammals will allow more nearly complete reconstructions of past environments and will become increasingly important as more detailed reconstructions are required by paleontologists.

Head posture and dental wear evaluation of bruxist children with primary teeth

2007 ◽  
Vol 34 (9) ◽  
pp. 663-670 ◽  
Author(s):  
A. L. VÉLEZ ◽  
C. C. RESTREPO ◽  
A. PELÁEZ-VARGAS ◽  
G. J. GALLEGO ◽  
E. ALVAREZ ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Dental Wear ◽  
Head Posture ◽  
Wear Evaluation
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