The authors compare the effects of natural (porcine) and synthetic (Toinex, USA, and Eschalon, France) bristle and rough toothbrushes on the tooth enamel and dentin in the course of toothbrushing. No abrasive effects were detected when brushing normal teeth in clear water. The rate of enamel and dentin abrasion in tooth powder or tooth paste suspension depended on the shape of bristle cut and particularly on the toothbrush roughness.
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Life history data derived from the dental histological analysis of Giraffa camelopardalis: Implications for the palaeohistology of extinct giraffids.
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January 2025
Department of Biological Sciences, University of Cape Town, Cape Town, Western Cape, South Africa.
The analysis of incremental marks in the enamel, dentine and cementum of extant and extinct species provides important information about the rate and pattern of tooth growth, which permits inferences about key life history traits. Traditionally, such research has mainly focused on primates, while other mammalian groups have remained relatively unexplored. In some cases, this has led to the misidentification of incremental markings and the miscalculation of dental growth parameters in non-primate taxa, which has highlighted the importance of obtaining more reliable comparative frameworks.
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PLoS One
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Archaeology, Environmental Changes and Geo-Chemistry, Vrije Universiteit Brussel, Belgium.
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View Article and Find Full Text PDFPhylogenetic signal in primate tooth enamel proteins and its relevance for paleoproteomics.
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Institut Català de Paleontologia Miquel Crusafont (ICP-CERCA), Universitat Autònoma de Barcelona, Edifici ICTA-ICP, Cerdanyola del Vallès, Barcelona, Spain; Unidad de Paleobiología, ICP-CERCA, Unidad Asociada al CSIC por el IBE UPF-CSIC, Cerdanyola del Vallès, Barcelona, Spain; Departament de Medicina i Ciències de la Vida, Institut de Biologia Evolutiva (CSIC-UPF), Universitat Pompeu Fabra, Barcelona, Spain.
Ancient tooth enamel, and to some extent dentin and bone, contain characteristic peptides that persist for long periods of time. In particular, peptides from the enamel proteome (enamelome) have been used to reconstruct the phylogenetic relationships of fossil taxa. However, the enamelome is based on only about 10 genes, whose protein products undergo fragmentation in vivo and post mortem.
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