INTRODUCTION The purpose of this study was to identify the influential factors responsible for clinical instrument separation of reused ProTaper Universal rotary instruments (Dentsply Maillefer, Ballaigues, Switzerland). METHODS Six thousand one hundred fifty-four root canals in 2,654 teeth were prepared using ProTaper Universal files in endodontic clinics. Separation incidence was determined...

AIMS To evaluate the oral health status of patients with moderate-severe chronic renal failure (CRF) and with terminal renal failure (TRF). DESIGN The study group was formed of 50 patients: 22 (44%) with moderate-severe CRF and 28 (56%) with TRF included in a haemodialysis programme. The controls (n=64) presented similar characteristics with regard to sex, age, weight and educational level. A...

BACKGROUND The study aims to ascertain the prevalence of traumatic dental injures of the maxillary permanent incisors at Dental Department, Pakistan Institute of Medical Sciences Islamabad during the years 2003-2005. Information concerning age, sex, cause, type of tooth, number of injured teeth and patterns of tooth injury were recorded retrospectively from 336 patients aged between 8-40 years,...

A pyrene-fused phenazinothiadiazole that shows electron mobilities (μe = 0.016 cm(2) V(-1) s(-1)) two orders of magnitude higher than those reported for pyrene-fused pyrazaacenes is described.

fusion is a developmental anomaly defined as the :union: of two normally separated tooth buds or the partial splitting of one tooth bud into two buds. depending on the stage of development, fusion may be either complete or incomplete. the significance of this particular case was that this fusion occurred in a posterior permanent mandibular tooth, while such a manifestation is more reported in m...

background: slugs have been known worldwide as important pests of agricultural and horticultural production. they also play a role as intermediate or definitive hosts of helminths parasite. in this purpose, current study was carried out to examine slug radular teeth structure and slug infection with helminths larvae in north of iran. methods: a total number of 114 slugs were collected from cent...