BACKGROUND Fixed prosthodontics is a routine dental treatment and microleakage is a major cause of its failure. OBJECTIVES The aim of this study was to assess the marginal microleakage of four cements in metal ceramic restorations with adapted and open margins. MATERIALS AND METHODS Sixty sound human premolars were selected for this experimental study performed in Tehran, Iran and prepared ...

it seems that characteristics of utopias have been inscribed in the most ancient iranian myths on the one hand, and drawn in shanameh book by toos sage (ferdowsi) on the other hand. apparently, theme and pattern of utopia were included in var jam kard (a garden built by king jamshid) at first place that is the most ancient one of such towns and according to vandidad (chapter of avesta), it was ...

We show that lens space surgeries on knots in S which arise from the primitive/toroidal construction also arise from the primitive/primitive construction. This continues a program to address the Berge Conjecture in the case of tunnel number one knots.

background: as glass ionomers have the ability to reload fluoride from outside sources, the aim was to compare the recharge pattern of six glass ionomer cements after exposure to fluoride. materials and methods: fuji vii, fuji ix, riva pink, riva bleach, ketac fil and fuji ix extra were investigated. the fluoride-containing materials used were tooth paste and mouth wash (colgate). specimens of ...

Follicular lymphomas occur rarely in the gastrointestinal tract, representing only 1-3% of all gastrointestinal tract B-cell non-Hodgkin lymphomas. We describe endoscopic analysis of 3 cases of follicular lymphoma in the small intestine using double-balloon endoscopy. Double-balloon endoscopy revealed multiple nodular lesions and elevated white patches, multiple polypoid lesions, and scattered ...

We study adaptation of a haploid asexual population on a fitness landscape defined over binary genotype sequences of length L. We consider greedy adaptive walks in which the population moves to the fittest among all single mutant neighbors of the current genotype until a local fitness maximum is reached. The landscape is of the rough mount Fuji type, which means that the fitness value assigned ...

Introduction No dental material meets all requirements to be considered as an ideal restorative material should meet all the requirements, and should be biocompatible and non-toxic to the tissues. Biomaterials 1993;14: 906–16]. Most of these materials have to contact or interact with body tissue and fluids, so material’s selection must take into consideration not only mechanical and physical pr...

The spores of ectomycorrhizal fungi (EMF) play critical roles in the population and community development of EMF. Here, the germination and infectivity of EMF spores are examined with reference to the ecological traits of the EMF species. Spores were collected from 12 EMF species, whose successional patterns have been studied in the volcanic desert on Mount Fuji, Japan. Spore germination experi...