introduction: microleakage can result in failure of endodontic treatment. an important characteristic of endodontic sealer is sealing ability. the aim of this experimental study was to compare the apical leakage of teeth obturated with gutta-percha and three different sealers (resin- and zinc oxide eugenol-based) with/without smear layer (sl). materials and methods: in this study, 100 single-ro...

objective: the aim of this study is to measure the effect of different condensation pressure on the microleakage of mineral trioxide aggregate (mta).  methods: this study was an invitro study. a total of 55 single rooted straight-canal human extracted sound teeth free of cracks or calcification were selected. teeth were sectioned from cej region at 3 mm above the root apex. remaining specimens ...

background: more psychiatric visits, especially non-emergency ones, to emergency departments (eds) of general hospitals have been observed in recent years. the aim of this study was to determine the characteristics of psychiatric visits to the ed of rasoul-e-akram hospital, tehran, iran. methods: in this cross-sectional study, during a two-month period, all psychiatric presentations and consult...

abstract background & aim: food insecurity is defined as limited availability at all times to sufficient food of an active life. the aim of this study was assessing the food insecurity status and some associated socioeconomic factors in women with metabolic syndrome. methods: the present cross-sectional study was conducted on 130 women between 30-60 years of age with metabolic syndrome referred...

objective: the aim of the present study was to investigate the prevalence of hypertension and type ii diabetes in elderly iranianresidents of the kahrizak charity foundation(kcf). materials and methods: in this cross-sectional study, a total of two hundred sixty eight men and women ≥60 years were studied. the data were collected during annual health examination of the elderly residents in kcf. ...

background : there are a few studies to assess nurses’ sleep quality and sleepiness in the iranian context. this study thus was carried out to examine the prevalence of sleepiness and sleep quality among nurses in south east of iran.   subjects and methods : the study applied a descriptive, explorative design.252 nurses randomly selected from kerman university hospitals during winter 2009. usin...

background and objective: gastroenteritis is one of the most important diseases in the world. this disease is more critical among children, people with immune deficiency and the sufferers from mal-nutrition. shigella spp. as the most important cause of dysentery, causes much mortality around the world. increasing antibiotic resistance is one of the major health problems. this research aimed to ...

background: malaria is one of the most important parasitic diseases in iran. due to importantce of drug policy, monitoring of chloroquine therapeutic efficacy in uncomplicated falciparum cases was carried out in south and south-east of iran in 2003. materials and methods: this discriptive study was carried out in five centers of sistan-baluchestan, hormozgan and kerman provinces (south and sout...

Binary search tree and framed ALOHA algorithms are commonly adopted to solve the anti-collision problem in RFID systems. In this letter, the read efficiency of these two anti-collision algorithms is compared through computer simulations. Simulation results indicate the framed ALOHA algorithm requires less total read time than the binary search tree algorithm. The initial frame length strongly a...

One of the most widely known topological index is the Wiener index. The Wiener Index Conjecture states that all positive integer numbers except a finite set are the Wiener indices of some trees. We explore the Wiener indices of the binary trees. We present efficient algorithms for generating the Wiener indices of the binary trees. Based on experiments we strengthen the conjecture for the class ...