OBJECTIVE To determine whether micro-computed tomography (micro-CT) could be used to reconstruct ancient dental anatomy accurately and differentiate the enamel from the dentin, as well as to verify whether micro-CT could detect tooth disorders such as attrition or caries accurately. METHODS Micro-CT imaging was performed, using a cone-beam micro-CT specimen scanner, on a 500-year-old human to...

The form of two hard tissues of the mammalian tooth, dentine and enamel, is the result of a combination of the phylogenetic inheritance of dental traits and the adaptive selection of these traits during evolution. Recent decades have been significant in unveiling developmental processes controlling tooth morphogenesis, dental variation and the origination of dental novelties. The enamel-dentine...

AIM This in vitro study evaluated the pulpal and subsurface temperatures during proximal tooth surface irradiation with different settings of an 808 nm diode laser. MATERIALS AND METHODS The elevation of pulpal and subsurface temperature during irradiation was measured using thermocouples positioned in the centre of the pulp chamber (n=30) and in the centre of a prepared 1.5 mm deep coronal c...

Analysis of surface and tooth-specific data from NHANES I and HHANES shows that the pattern of dental caries differs greatly from tooth to tooth and surface to surface. Occlusal caries precedes all other types, and increases most rapidly and to the highest levels in the molars. Caries on the proximal surfaces comes later. For sealants to be of value, they must reduce the need for restorations. ...

Ameloglyphics is the study of enamel rod end patterns on a tooth surface. Our aim was to study the in vivo analysis of enamel rod end patterns on tooth surfaces for personal identification. In this study, the maxillary left canine and 1st premolar of 30 men and 30 women were included. The cellulose acetate peel technique was used to record enamel rod endings on tooth surfaces. Photomicrographs ...

Possibly the first biofilm samples ever examined from a microbiological perspective were obtained from the oral cavity: Antonie van Leeuwenhoek’s tooth scrapings. Since that time, oral microbiologists have made major contributions to microbial taxonomy, physiology, and ecology. The oral cavity distinguishes itself from other environments by having over 700 phylotypes (taxonomic units), nearly h...

Numerous loci of large effect have been shown to underlie phenotypic variation between species. However, loci with subtle effects are presumably more frequently involved in microevolutionary processes but have rarely been discovered. We explore the genetic basis of shape variation in the first upper molar of hybrid mice between Mus musculus musculus and M. m. domesticus. We performed the first ...

Here we report a tooth of a large archosauriform from the Upper Triassic of New Mexico, USA that displays developmental anomalies of carina formation. This tooth has two supernumerary carinae, both on the lingual side of the tooth. Previously, carina anomalies of this sort were primarily known from theropod dinosaurs, but always from the labial surface. Integrating this specimen into a reassess...