Quantification of dentine shape in anthropoid primates

Olejniczak, Anthony J.; Martin, Lawrence; Ulhaas, Lilian

doi:10.1016/s0940-9602(04)80087-6

Cited by 34 publications

(26 citation statements)

References 11 publications

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“…This interface represents the initial position of the cells that are responsible for enamel and dentine secretion and is believed to be heavily influenced by embryological enamel knots that form before hard-tissue secretion (reviewed in Avishai and colleagues 93 and Skinner and colleagues 94 ). Olejniczak and colleagues, 85,[95][96][97] have demonstrated that the primate EDJ has a taxon-specific shape, despite some intra-taxon variation, and that components of this shape, such as relative dentine horn height, may serve to group members of the Ponginae. Before the recent application of micro-CT (Fig.…”

Section: Enamel-dentine Junction Shapementioning

confidence: 99%

“…5), EDJ shape was assessed from impressions of enamel caps, 98 acid etching of complete teeth, 99 or physical sections. 95,96 Skinner and colleagues 94 recently considered the EDJ from a nondes- . F) 3D rendering of isodensity segments extracted from the absorption scan data showing the 3D mineralization pattern of the enamel.…”

Section: Enamel-dentine Junction Shapementioning

confidence: 99%

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New visions of dental tissue research: Tooth development, chemistry, and structure

Smith

Tafforeau²

2008

Evolutionary Anthropology

101

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Teeth are one of the best preserved and most commonly recovered elements in primate fossil assemblages. Taxonomic, functional, and phylogenetic hypotheses often rely on dental characters, despite considerable evidence of homoplasy in tooth form and large variation in tooth size within and among primates.1,2 Recent studies have led to new areas of research centered on incremental tooth development, chemical composition, and internal structure. Due to rapid technological developments in imaging and elemental sampling, these new approaches have the potential to increase our understanding of developmental biology, including not only changes in the pace of growth and reproduction, but also our assessments of diets, migration patterns, environments, and taxonomy. The integration of these temporal, chemical, and structural approaches heralds a bright future for the role of dental tissue research in evolutionary anthropology. © 2008 Wiley‐Liss, Inc.

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Section: Enamel-dentine Junction Shapementioning

confidence: 99%

Section: Enamel-dentine Junction Shapementioning

confidence: 99%

New visions of dental tissue research: Tooth development, chemistry, and structure

Smith

Tafforeau²

2008

Evolutionary Anthropology

101

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“…1) reveals that each morphological feature expressed at the outer enamel surface (OES) is sharply expressed at the EDJ level (contra Olejniczak et al, 2004). Indeed, while the main cusps are externally well differentiated, the short precingulid accessory cusps (i.e., paraconid, centroconid, tuberculum sextum) and the complex crest network (i.e., the paracristid between paraconid and protoconid, the protocristid between protoconid and metaconid, the hypolophid between hypoconid and entoconid, the hypometacristid between metaconid and centroconid, the hypoprotocristid between protoconid and centroconid, and the entolophid between entoconid and hypoconulid) (Butler and Mills, 1959) are more markedly expressed at the EDJ.…”

Section: Outer Vs Inner Structural Morphologymentioning

confidence: 99%

“…Indeed, while the main cusps are externally well differentiated, the short precingulid accessory cusps (i.e., paraconid, centroconid, tuberculum sextum) and the complex crest network (i.e., the paracristid between paraconid and protoconid, the protocristid between protoconid and metaconid, the hypolophid between hypoconid and entoconid, the hypometacristid between metaconid and centroconid, the hypoprotocristid between protoconid and centroconid, and the entolophid between entoconid and hypoconulid) (Butler and Mills, 1959) are more markedly expressed at the EDJ. In fact, compared to the OES signal, sharper topographic information of taxonomic and phylogenetic value is commonly observed in extant and fossil hominids at the EDJ level (Corruccini, 1987;Macchiarelli et al, 2006Macchiarelli et al, , 2009Olejniczak et al, 2004Olejniczak et al, , 2007Skinner et al, 2008a,b;Smith et al, 2006Smith et al, , 2009Zanolli and Mazurier, 2013).…”

Section: Outer Vs Inner Structural Morphologymentioning

confidence: 99%

“…Information available so far on the inner dental structure of this fossil hominoid derives from a few histological sections of molar teeth (Andrews and Martin, 1991;Olejniczak et al, 2004;Smith et al, 2003) and from a preliminary microtomographic-based investigation of a deciduous and a permanent molar (Zanolli et al, 2010). By combining microtomographic and histological evidence, this study aims to identify links between tooth structural morphology and enamel development in Oreopithecus.…”

Section: Introductionmentioning

confidence: 99%

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Enamel thickness and enamel growth in Oreopithecus: Combining microtomographic and histological evidence

Zanolli

Dean

Rook

et al. 2016

Comptes Rendus Palevol

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a b s t r a c tOreopithecus bambolii, a large-bodied fossil ape, lived in the Tusco-Sardinian archipelago during the Late Miocene, until ca. 6.7 Ma. Its dentition, an apparent blend of hominoid and cercopithecoid-like features, has been a matter of discussion since its first description, in 1872. While the height and sharpness of its molar cusps recall some Cercopithecidae, Oreopithecus is currently considered by many as more likely related to dryopithecines. Here, we use microtomographic-based quantitative imaging and histological evidence to link outer and inner tooth structural morphology with enamel development in Oreopithecus permanent teeth. The material consists of 14 teeth/crowns from the sites of Baccinello and Casteani, in Tuscany, and Fiume Santo, in Sardinia. In particular, we add to the record of 2-3D of molar enamel thickness topographic variation and enamel-dentine junction morphology, and using high-resolution replicas of the outer crown and ground sections, comparatively assess molar growth trajectory (crown formation times and enamel extension rates). Our results shed new light on dental development of this "enigmatic anthropoid" and provide additional evidence concerning the still debated question of its evolutionary history.

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Molar enamel thickness and dentine horn height in Gigantopithecus blacki

Olejniczak

Smith

Wang

et al. 2007

American J Phys Anthropol

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Absolutely thick molar enamel is consistent with large body size estimates and dietary inferences about Gigantopithecus blacki, which focus on tough or fibrous vegetation. In this study, 10 G. blacki molars demonstrating various stages of attrition were imaged using high-resolution microtomography. Three-dimensional average enamel thickness and relative enamel thickness measurements were recorded on the least worn molars within the sample (n = 2). Seven molars were also virtually sectioned through the mesial cusps and two-dimensional enamel thickness and dentine horn height measurements were recorded. Gigantopithecus has the thickest enamel of any fossil or extant primate in terms of absolute thickness. Relative (size-scaled) measures of enamel thickness, however, support a thick characterization (i.e., not "hyper-thick"); G. blacki relative enamel thickness overlaps slightly with Pongo and completely with Homo. Gigantopithecus blacki dentine horns are relatively short, similar to (but shorter than) those of Pongo, which in turn are shorter than those of humans and African apes. Gigantopithecus blacki molar enamel (and to a lesser extent, that of Pongo pygmaeus) is distributed relatively evenly across the occlusal surface compared with the more complex distribution of enamel thickness in Homo sapiens. The combination of evenly distributed occlusal enamel and relatively short dentine horns in G. blacki results in a flat and low-cusped occlusal surface suitable to grinding tough or fibrous food objects. This suite of molar morphologies is also found to varying degrees in Pongo and Sivapithecus, but not in African apes and humans, and may be diagnostic of subfamily Ponginae.

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Quantification of dentine shape in anthropoid primates

Cited by 34 publications

References 11 publications

New visions of dental tissue research: Tooth development, chemistry, and structure

New visions of dental tissue research: Tooth development, chemistry, and structure

Enamel thickness and enamel growth in Oreopithecus: Combining microtomographic and histological evidence

Molar enamel thickness and dentine horn height in Gigantopithecus blacki

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