Live primates and dental replication: New problems and new techniques

Teaford, Mark F.; Oyen, Ordean J.

doi:10.1002/ajpa.1330800109

Cited by 77 publications

(54 citation statements)

References 37 publications

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“…Molds and scans of the Couvin molar were made using already established procedures (Teaford and Oyen, 1989; see technical details and results in Supplementary Online Materials [SOM]).…”

Section: Anthropological Studymentioning

confidence: 99%

The Neandertal lower right deciduous second molar from Trou de l'Abîme at Couvin, Belgium

Toussaint

Olejniczak

Zaatari

et al. 2010

Journal of Human Evolution

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a b s t r a c tA human lower right deciduous second molar was discovered in 1984 at the entrance of Trou de l'Abîme at Couvin (Belgium). In subsequent years the interpretation of this fossil remained difficult for various reasons: (1) the lack of taxonomically diagnostic elements which would support its attribution to either Homo (sapiens) neanderthalensis or H. s. sapiens; (2) the absence of any reliable chronostratigraphic interpretation of the sedimentary sequence of the site; (3) the contradiction between archaeological interpretations, which attributed the lithic industry to a transitional facies between the Middle and Early Upper Palaeolithic, and the radiocarbon date of 46,820 AE 3,290 BP obtained from animal bone remains associated with the tooth and the flint tools.Thanks to recent progress regarding these three aspects, the tooth from Trou de l'Abîme may now be studied in detail. Analyses of the morphology and enamel thickness of the fossil yielded diagnostic characters consistent with an attribution to Neandertals. Re-examination of the lithic industry of Couvin shows that it corresponds to the late Middle Palaeolithic rather than a transitional facies. Furthermore, a new analysis of the site stratigraphy indicates that the unit situated above the archaeological layer in which the tooth was found is probably a palaeosol of brown soil type. Comparison with the regional cave sequences as well as with the reference sequence from the Belgian loess belt tends to show that the most recent palaeosol of this type is dated between 42,000 and 40,000 BP. This is consistent with both a recently obtained AMS result at 44,500 BP and the published conventional date.

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“…Molds and scans of the Couvin molar were made using already established procedures (Teaford and Oyen, 1989; see technical details and results in Supplementary Online Materials [SOM]).…”

Section: Anthropological Studymentioning

confidence: 99%

The Neandertal lower right deciduous second molar from Trou de l'Abîme at Couvin, Belgium

Toussaint

Olejniczak

Zaatari

et al. 2010

Journal of Human Evolution

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“…Araldite M (Ciba-Geigy, Melbourne, Australia) caused deterioration of RTV 3110 and CAF 3 moulds (A. R. Evans, personal observation); moulding and casting artefacts have been found by Gordon, 1984 andTeaford &Oyen, 1989). Many casts (.…”

Section: Discussionmentioning

confidence: 99%

Confocal imaging, visualization and 3‐D surface measurement of small mammalian teeth

Evans¹,

Harper

Sanson³

2001

Journal of Microscopy

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SummaryThe difficulties traditionally faced by functional morphologists in representing and interpreting three-dimensional objects can now be mostly overcome using available laser and computer imaging technologies. A practical method for three-dimensional imaging of small mammalian teeth using confocal microscopy is reported. Moulding and casting of the teeth were first performed, followed by confocal fluorescence imaging. Accuracy and precision of the scanned structures were tested in morphometric studies by using a new technique to measure the noise in the scan of a three-dimensional surface, and linear and angular dimensions of the scans were compared with measurements made using traditional morphological tools. It is shown that measurements can be taken with less than 4% difference from the original object. Teeth of the microchiropteran bat Chalinolobus gouldii were scanned and measured to show the potential of the techniques. Methods for visualizing the small teeth in three-dimensional space, and animating the teeth in occlusion, show the power of this approach in aiding a three-dimensional understanding of the structure and function of teeth and other three-dimensional structures.

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“…Impressions were then made using Coltene President Jet Regular (polysiloxane vinyl) impression material, and casts were made with EPOTEK 301 epoxy resin. This procedure reproduces features with a resolution of a fraction of a micron (Teaford and Oyen 1989;El-Zaatari et al 2005). After light microscopy examination, specimens deemed suitable for further study were sputter-coated with approximately 5 nm of gold, and examined using SEM at 20-25 kV.…”

Section: Tooth Wear Analysismentioning

confidence: 91%

The evolution of jaw mechanism and dental function in heterodont crocodyliforms

Ősi

2013

Historical Biology

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Heterodont dentition sometimes including multicuspid crowns appeared in numerous fossil forms through all main lineages of the Crocodyliformes. Teeth in these complex dentitions frequently bear wear facets that are exclusive indicators of tooth-tooth occlusion. Besides dental features, specializations of the jaw apparatus, jaw adductors and mandibular movement can be recognized, all reflecting a high variability of jaw mechanism and of intraoral food

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Live primates and dental replication: New problems and new techniques

Cited by 77 publications

References 37 publications

The Neandertal lower right deciduous second molar from Trou de l'Abîme at Couvin, Belgium

The Neandertal lower right deciduous second molar from Trou de l'Abîme at Couvin, Belgium

Confocal imaging, visualization and 3‐D surface measurement of small mammalian teeth

The evolution of jaw mechanism and dental function in heterodont crocodyliforms

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