purpose: to report a case who had undergone lasik in his right eye and prk in the fellow eye for correction of equivalent myopia but developed progressive post-operative keratectasia only in the right eye. patient and findings: a 30-year-old man had undergone lasik in right eye 3 years ago for correction of refractive error of -1.75  -1.50@48° and prk in left eye 2 years ago for correction of r...

objective: fiber-reinforced composite (frc) posts have recently become more popular for restoring endodontically treated teeth because of providing esthetics, better stress distribution and lower risk of root fracture. resistance against tensile forces dislodging the post from the root canal is a prerequisite for these posts. this study aimed to evaluate the tensile retention (strength) of intr...

to explore the trend and composition of post-graduate iranian students who received governmental scholarship during the last two decades.detailed information about the awarded scholarships and also about the number of post graduate students in clinical and basic sciences in domestic universities were collected from the related offices within the ministry of health and medical education and thei...

conclusions intravenous paracetamol is an effective and safe treatment for patients admitted to the emergency department with headaches caused by head trauma. patients and methods this study was a single-center, prospective, randomized, double-blind clinical trial conducted on two groups treated with intravenous paracetamol and intravenous morphine. thirty patients were enrolled in each group. ...

conclusions pregabalin administered as premedication provided significant postoperative pain relief and decreased the requirement of other parenteral analgesics. pregabalin doses of 150 mg had a better analgesic profile, but the advantages of their use may be limited by side effects such as dizziness. thus, it is concluded that pregabalin doses of 75 mg may be the optimal pre-emptive dose. back...

introduction: the aim of this study was to compare the effect of post space preparation with gates glidden drills or hand files on the sealing ability of gutta-percha or resilon obturation materials. materials and methods: one-hundred and four single-rooted human teeth were instrumented and divided into four experimental groups (n=21 each) and two groups of positive and negative control (n=10)....

introduction: the aim of this study was to determine the effect of different luting agents on fracture resistance of endodontically treated teeth restored with casting post. materials and methods: in this experimental study, forty extracted human maxillary central incisors teeth with the mean length of 23mm were randomly assigned in to four groups. all the studied teeth were caries free without...

introduction: tonsillectomy is the one of the most common types of surgery in children, and is often accompanied by post-operative pain and discomfort. methods of pain control such as use of non-steroidal anti-inflammatory drugs (nsaids), narcotics, and local anesthetics have been used, but each have their own particular side effects. in this study we investigated the effect of ketamine on post...