Our knowledge on the growth of anterior teeth in extant and extinct humans has recently been broadened. Two studies have compared Neandertal dental growth with that of Upper PaleolithiceMesolithic humans and with modern contemporary humans. Neandertals clearly show fewer perikymata in their anterior teeth than do Upper PaleolithiceMesolithic people of Europe, as reported by Ramı́rez Rozzi and Be...

the purpose of this ex- vivo study was to evaluate the fracture resistance of simulated immature teeth, obturated with gutta-percha or resilon and reinforced by either composite resin or fiber post.eighty-four human maxillary incisors were divided into seven groups (n=12). teeth in all groups were prepared until peeso #5 (1.5mm) could be passed through the apex. root ends received 4mm of mta pl...

In this paper, we describe a solid freeform fabrication procedure for human dental restoration via porcelain slurry micro-extrusion. Based on submicron-sized dental porcelain powder obtained via ball milling process, a porcelain slurry formulation has been developed. The formulation developed allows the porcelain slurry to show a pseudoplastic behavior and moderate viscosity, which permits the ...

Measuring track density of alpha particles emitted from human teeth and assess the resulting cancer risk

introduction: this in vitro study evaluated the influence of composite thickness (with or without fiber reinforcement) on fracture resistance of direct restorations in endodontically treated teeth. methods and materials: fifty-six intact human premolars were chosen and randomly divided into four groups ( n =14). after preparation of a mesio-occluso-distal (mod) cavities and cusp reduction, the ...

the term riga-fede disease has been used to describe chronic traumatic ulceration that occurs on the ventral surface of the tongue by natal and neonatal teeth in infants. it is important to diagnose the lesion and treat it by eliminating the source of trauma. in this case report, the neonatal tooth was extracted and after 2 weeks the lesion was resolved and the baby was feeding well.in addition...