introduction: few researches have been conducted researches on the influence of the type of dental stone used for fabrication of casts on the adaptation of denture bases. the purpose of this study was to compare the effect of two types of stone casts on the accuracy of fit in complete denture bases. methods: using sixty fully replicated master casts obtained by duplicating a metal die represent...

$Rsb{0}$-algebras, which were proved to be equivalent to Esteva and Godo's NM-algebras modelled by Fodor's nilpotent minimum t-norm, are the equivalent algebraic semantics of the left-continuous t-norm based fuzzy logic firstly introduced by Guo-jun Wang in the mid 1990s.In this paper, we first establish a Stone duality for the category of MV-skeletons of $Rsb{0}$-algebras and the category of t...

Background: The aim of this study was to describe the one-decade experience in Percutaneous Nephrolithotomy surgery in children with kidney stones in Tehran, Iran. Methods: All patients (less than 18 years old) undergoing Percutaneous Nephrolithotomy at our referral medical center, were reviewed in this cross-sectional study. All the demographics, surgical data and post-operative information...

From Sep. 1984 to Aug. 1990,99 patients were treated for ureteral stone using the urekroscope. In five patients ureteroscopy was repeated for a second stone. In one patient the procedure was diagnostic in nature and in the rest of the patients it had a curative value. In 60 patients the stone was removed by electrohydraulic and basket combination and in25 cases, dilatation alone was enough...

this is to report the case of a huge vaginal stone, and bladder calculi in a 26-year-old woman with previous operation of bladder exstrophy. it seems that the vaginal stone was secondary to the remaining wire used in her previous reconstructive surgery for pelvic closure 20 years ago and now surgery is performed to remove the vaginal and bladder stones.

objective: previous studies have demonstrated that dental stone casts can be disinfected by replacing 10v% of required water with 5.25% sodium hypochlorite solution. this comparative study evaluated physical properties of dental stone models produced by replacing distilled water with sodium hypochlorite.   methods: in this in-vitro experimental study, a total of 45 dental stone models were prod...

When I was invited to take on the role of associate editor in chief for special issues, I knew that my predecessors, Maureen Stone and Holly Rushmeier, were going to be tough acts to follow. CG&A’s themed issues have always been an integral part of what makes the magazine unique. I recently browsed through all the special issues from the past 10 years, and they do indeed present a potted histor...

Carbon activated powdered was prepared from activated carbon derived from olive stone. Then byusing the surface methodology, many parameters such as pH, furnace temperature (T), acid ratio,time of activation that affect on the qualities prepared activated carbon produced and its efficiencywere investigated. In addition, the adsorption of Congo Red onto the activated olive stone carbonactive was...