Regenerative endodontics is a new concept for the management of permanent immature teeth with necrotic pulps. This procedure enables to replace damaged dentine and pulp-dentin complex within root structure healthy tissue. Firstly, elimination clinical symptoms infection then, thickening canal walls continuing maturation finally filled host’s own vital tissue are main goals regenerative endodont...

Two species, one each of Abyssocladia Lévi, 1964, and Asbestopluma Topsent, 1901, are recorded from the far eastern Solomon Islands for the first time. Abyssocladia lakwollii sp. nov. is characterized by the pedunculate disc-shape of the body, the unusually large size of the isochelae I microscleres, and by the shape of the cleistochelae with crossed central teeth. Asbestopluma (A.) desmophora ...

This article presents an approach to the optimization of helical involute gears for geometrical feasibility, contact ratio, teeth sliding velocity, stresses and static transmission error (STE). The teeth shape is subject to random perturbations due to wear (a randomized Archard’s wear). The consequences of shape inaccuracies are statistically expressed as a 90% percentile of the STE variation, ...

Question: Do the biomechanical properties of the diet influence the tooth shape of insectivores? We examined dietary ‘intractability’, the extent to which structural strength, toughness and stiffness of a food are increased, roughly equivalent to ‘hardness’. Hypotheses: The following three factors may cause discrepancies in tooth form in animals with different diets: (1) optional functional for...

The prevalence of dental anomalies including agenesis, crown shape, tooth position, root shape, and invagination were examined in 111 orthodontic patients; 74.77 per cent of the patients exhibited at least one dental anomaly. Invagination was found to be the most prevalent anomaly, whereas supernumerary teeth and root dilaceration were the least frequent anomalies. Dental invagination and short...

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...