Objective. To compare the efficacy of ProTaper retreatment files in removing three different obturating materials. Study Design. Forty-five human, single-rooted premolars were divided into three experimental groups. Group 1 was obturated with gutta-percha and AH Plus sealer, Group 2 was obturated with gutta-percha and zinc oxide eugenol sealer, and Group 3 was obturated with GuttaFlow. Retreatm...

Plates of austenitic stainless steel are often used in orthopedic surgery for fixing ends of the broken bones and for repairing fractures. The paper analyzes a premature breakage of six plates for fixing broken bones with different patients during their recovery. Each plate's breakage can induce serious aftermaths such as a new surgery, unexpected undesired complications and a prolonged healing...

MATERIALS Reagents AmpliTaq polymerase (Perkin Elmer) Bovine serum albumin (BSA) (nuclease-free; Boehringer Mannheim; stock 1.6 mg/ml) Dimethyl sulfoxide (DMSO) (Aldrich) DNA in ES PCR Lysis buffer (include positive and negative controls) dNTPs (Pharmacia; stock of the mix 10 mM) ES colonies in G418 selection (see Electroporating DNA into Embryonic Stem (ES) Cells and Selection) Light mineral o...

Materials and Methods: 15 single rooted premolars were selected and middle portion of each root was sectioned perpendicular to the long axis to produce two discs of 2.00 ± 0.05 mm thickness using a diamond disk. 30 root slices were produced and canal lumen was widened using Gates Glidden drills to produce standardized internal diameter of 1.3mm and root sections were filled with ERRM, MTA and B...

The objective of this research was to determine if gutta-percha points with calcium hydroxide [Ca(OH)2] improve the apical seal after root canal filling and if the master point does it alone. Human single recently extracted teeth were biomechanically prepared and the root canals filled by the lateral condensation technique with ZOE and gutta-percha points, with or without calcium hydroxide. The...

This cross-sectional study is the first to estimate the prevalence of cattle pediculosis in Tunisia. A total of 39 cattle farms in the region of Nabeul in north-east Tunisia were visited and lice were collected by intensively brushing 789 cattle. The prevalence was estimated to be 20.5% on the farms (8/39) and 4.7% in animals (37/789). Collected parasites were examined under a stereomicroscope ...

PURPOSE This study aimed to investigate the effect of changing the kilovoltage peak (kVp) on the radiographic assessment of dental caries. MATERIALS AND METHODS Seventy-five extracted posterior teeth with proximal caries or apparently sound proximal surfaces were radiographed with conventional E-speed films and a photostimulable phosphor system using 60 kVp and 70 kVp for the caries assessmen...

The zebrafish larval tail fin is ideal for studying tissue regeneration due to the simple architecture of the larval fin-fold, which comprises of two layers of skin that enclose undifferentiated mesenchyme, and because the larval tail fin regenerates rapidly within 2-3 days. Using this system, we demonstrate a method for capturing the repair dynamics of the amputated tail fin with time-lapse vi...

In this study, toxicity of water associated fraction of 10W-40 motor oil was investigated during the early life stages of zebrafish (Danio rerio). In 1.5-hour post fertilization (hpf), the fertilized zebrafish eggs were exposed to the oil fraction (1.25, 2.5, 5.0,10.0, 20.0 and 40.0 v/v) and were followed through 24, 48, and 72 hpf. The morphological endpoints of development toxicity of the oil...

Aim: The purpose of this study is to evaluate the effect different torque settings ProTaper Next files on microcrack formation. Materials and methods: Ninety mandibular anterior teeth were used. Fifteen served as control 75 divided into three groups according (n=25). In group 1; root canals instrumented using at a rotational speed 300rpm 2.0 Ncm torque. 2; used with 3.5 torque, in 3; 5.2 Teeth ...