Dental trait expression at the enamel-dentine junction of lower molars in extant and fossil hominoids

Skinner, Matthew M.; Wood, Bernard; Boesch, Christophe; Olejniczak, Anthony J.; Rosas, Antonio; Smith, Tanya M.; Hublin, Jean‐Jacques

doi:10.1016/j.jhevol.2007.09.012

Cited by 134 publications

(170 citation statements)

References 38 publications

Supporting

Mentioning

157

Contrasting

Unclassified

Order By: Relevance

“…A comprehensive understanding of the feeding biomechanics and dental functional anatomy of living anthropoids is required to accurately reconstruct the diets of fossil primates. Although considerable attention has been devoted to the functional morphology of living and fossil anthropoid molars and premolars (Groves and Napier, 1968;Kay, 1978;Lucas, 1980Lucas, , 1982Wood et al, 1983;Benyon, 1986;Ungar and Kay, 1995;Kay and Ungar, 1997;Benyon et al, 1998;Strait, 1998;Ungar, 1998;Smith, 1999;Ungar and Kiera, 2003;Teaford, 2007;Skinner et al, 2008;Kupczik et al, 2009) comparatively little is known about the functional morphology of anthropoid incisors.…”

Section: Introductionmentioning

confidence: 99%

Incisor Crown Bending Strength Correlates With Diet and Incisor Curvature in Anthropoid Primates

Deane

2014

The Anatomical Record

View full text Add to dashboard Cite

Anthropoid incisors are large relative to the postcanine dentition and function in the preprocessing of food items. Previous analyses of anthropoid incisor allometry and shape demonstrate that incisor morphology is correlated with preferred foods and that more frugivorous anthropoids have larger and more curved incisors. Although the relationship between incisal crown curvature and preferred foods has been well documented in extant and fossil anthropoids, the functional significance of curvature variation has yet to be conclusively established. Given that an increase in crown curvature will increase maximum linear crown dimensions, and bending resistance is a function of linear crown dimensions, it is hypothesized that incisor crown curvature functons to increase incisor crown resistance to bending forces. This study uses beam theory to calculate the mesiodistal and labiolingual bending strengths of the maxillary and mandibular incisors of hominoid and platyrrhine taxa with differing diets and variable degrees of incisal curvature. Results indicate that bending strength correlates with incisal curvature and that frugivores have elevated incisor bending resistance relative to folivores. Maxillary central incisor bending strengths further discriminate platyrrhine and hominoid hardand soft-object frugivores suggesting this crown is subjected to elevated occlusal loading relative to other incisors. These results are consistent with the hypothesis that incisor crown curvature functions to increase incisor crown resistance to bending forces but does not preclude the possibility that incisor bending strength is a composite function of multiple dentognathic variables including, but not limited to, incisor crown curvature.

show abstract

Section: Introductionmentioning

confidence: 99%

Incisor Crown Bending Strength Correlates With Diet and Incisor Curvature in Anthropoid Primates

Deane

2014

The Anatomical Record

View full text Add to dashboard Cite

show abstract

“…Others have shown that the shape of the EDJ can determine the morphology of the outer enamel surface. 62,63 Whilst phylogenetic studies have discussed the relative contributions of molar dentine and enamel proportions in the genus Homo. 48 Future phylogenetic studies may profitable explore dentine proportions when they consider dental traits at the outer enamel surface.…”

mentioning

confidence: 99%

Two-dimensional patterns of human enamel thickness on deciduous (dm1, dm2) and permanent first (M1) mandibular molars

Mahoney

2010

Archives of Oral Biology

View full text Add to dashboard Cite

“…Techniques such as microCT (52), confocal microscopy (53), and synchroton radiation microtomography (SR-μCT) (54) have been used to image the internal macro-and microstructure of higher primates and hominin fossils (55). MicroCT provides better images of small structures such as teeth than regular CT, and it is now being used to capture the detailed morphology of the enamel-dentine junction (EDJ) (56,57). This has a 2-fold advantage.…”

Section: Opportunitiesmentioning

confidence: 99%

Reconstructing human evolution: Achievements, challenges, and opportunities

Wood

2010

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

This contribution reviews the evidence that has resolved the branching structure of the higher primate part of the tree of life and the substantial body of fossil evidence for human evolution. It considers some of the problems faced by those who try to interpret the taxonomy and systematics of the human fossil record. How do you to tell an early human taxon from one in a closely related clade? How do you determine the number of taxa represented in the human clade? How can homoplasy be recognized and factored into attempts to recover phylogeny?

show abstract

Dental trait expression at the enamel-dentine junction of lower molars in extant and fossil hominoids

Cited by 134 publications

References 38 publications

Incisor Crown Bending Strength Correlates With Diet and Incisor Curvature in Anthropoid Primates

Incisor Crown Bending Strength Correlates With Diet and Incisor Curvature in Anthropoid Primates

Two-dimensional patterns of human enamel thickness on deciduous (dm1, dm2) and permanent first (M1) mandibular molars

Reconstructing human evolution: Achievements, challenges, and opportunities

Contact Info

Product

Resources

About