INTRODUCTION The aim of the present study was to compare hand stainless steel K-files and Nickel-Titanium Profile 0.04 taper 29 series rotary instruments for their efficiency, procedural errors and time consumed in preparation of root canal system. MATERIALS AND METHODS A total of 46 maxillary and mandibular first premolars extracted for orthodontic purposes were collected (two contralateral ...

Objective To study reproductive outcomes, and pregnancy delivery complications after conservative or operative treatment of rectovaginal endometriosis during long-term follow-up. Design Retrospective cohort study. Setting University hospital. Patient(s) Women with referred to hospital due any indication from 2004 2013 (N = 543) who were treated initially eith...

background and aims. the use of fluoride mouthrinses has been proved to be one of the most effective ways to prevent tooth decay. a community based program using f+ rinse at school has also proved to be well-controlled and efficient. the aim of this investigation was to evaluate fluoride uptake level of a locally prepared naf rinse used in iran’s school program during 2005. materials and method...

A rapid, viable and safe fabrication method for biomaterials synthesis is reported using high-frequency AC electrospraying. We demonstrate its potential for polymeric nanoparticle fabrication, drug encapsulation in mono-dispersed micron-sized biodegradable polymer shells and the synthesis of 1microm biodegradable fibers with adjustable pore sizes as bioscaffolds for tissue/orthopaedic engineeri...

background: non-steroidal anti-inflammatory drugs (nsaid) have been associated with antioxidant property and have been shown to improve the circulating antioxidant status on daily dosing in different inflammatory conditions. the present study was conducted to investigate the antioxidant role of meloxicam in aluminum induced oxidative stress in rat brain. methods: in the in vivo experiments, spr...

fibers of poplar wood (populus nigra l.) were prepared and oven dried. afterwards, they were acetylated with acetic anhydride without a catalyst. acetylation was carried out for different durations at 120ºc. different weight percentage gains (wpgs) were achieved based on the operating conditions. acetylated fibers were exposed to varying levels of relative humidity to determine equilibrium mois...