Morphology of the enamel-dentine junction in sections of anthropoid primate maxillary molars

Olejniczak, Anthony J.; Gilbert, Creighton; Martin, Lawrence; Smith, Tanya M.; Ulhaas, Lilian; Grine, Frederick E.

doi:10.1016/j.jhevol.2007.04.006

Cited by 40 publications

(37 citation statements)

References 32 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

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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

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101

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“…Enamel thickness analysis plays an important role in the taxonomic, phylogenetic, and dietary assessment of extant and fossil primates (Schwartz, 2000;Martin et al, 2003;Grine et al, 2005;Olejniczak et al, 2007;Smith et al, 2012). Following Martin's method for measuring enamel thickness using a single physical crosssection on primate teeth (1985), non-destructive methods based on both synchrotron and standard micro-computed tomography (micro-CT) have been suggested to refine the two-dimensional (2D) enamel thickness analysis and to study the thickness of dental enamel in its full threedimensional (3D) form (Kono, 2004;Tafforeau, 2004;Olejniczak, 2006;Olejniczak et al, 2008).…”

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confidence: 99%

Technical Note: Guidelines for the digital computation of 2D and 3D enamel thickness in hominoid teeth

Benazzi

Panetta

Fornai

et al. 2013

American J Phys Anthropol

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The study of enamel thickness has received considerable attention in regard to the taxonomic, phylogenetic and dietary assessment of human and non-human primates. Recent developments based on two-dimensional (2D) and three-dimensional (3D) digital techniques have facilitated accurate analyses, preserving the original object from invasive procedures. Various digital protocols have been proposed. These include several procedures based on manual handling of the virtual models and technical shortcomings, which prevent other scholars from confidently reproducing the entire digital protocol. There is a compelling need for standard, reproducible, and well-tailored protocols for the digital analysis of 2D and 3D dental enamel thickness. In this contribution we provide essential guidelines for the digital computation of 2D and 3D enamel thickness in hominoid molars, premolars, canines and incisors. We modify previous techniques suggested for 2D analysis and we develop a new approach for 3D analysis that can also be applied to premolars and anterior teeth. For each tooth class, the cervical line should be considered as the fundamental morphological feature both to isolate the crown from the root (for 3D analysis) and to define the direction of the cross-sections (for 2D analysis).

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“…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%

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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Morphology of the enamel-dentine junction in sections of anthropoid primate maxillary molars

Cited by 40 publications

References 32 publications

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

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

Technical Note: Guidelines for the digital computation of 2D and 3D enamel thickness in hominoid teeth

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

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