AIM Several new irreversible hydrocolloid formulations have recently become available with claims of an improved dimensional stability by the manufacturers. The aim of this study was to evaluate the accuracy of casts made from alginate impression materials poured immediately and after specific storage periods. METHODS AND MATERIALS Five alginates were tested: CA 37 (Cavex); Jeltrate (Dentsply...

Aim: To evaluate the effects of handling with different type gloves on setting time, compressive and tensile strength putty-type silicone impression materials. Methodology: The study was conducted at COMSATS Lahore approved by IRB FMH College Medicine Dentistry. In this in-vitro three (Polythene, Latex Vinyl) two brands each addition (Flexceed Elite P&P) condensation (Zetaplus Cavex) materi...

Energy dispersive X-ray spectroscopy microanalysis (EDX), scanning electron microscopy (SEM), and Archimedes' Principle were used to determine the characteristics of inorganic filler particles in five dental alginates, including Cavex ColorChange (C), Hydrogum 5 (H5), Hydrogum (H), Orthoprint (O), and Jeltrate Plus (JP). The different alginate powders (0.5 mg) were fixed on plastic stubs (n = 5...

statement of problem: disinfection of dental impressions is a weak point in the dental hygiene chain. in addition, dental office personnel and dental technicians are endangered by cross-contamination. objectives : this study aimed to investigate the dimensional stability of two color-changing irreversible hydrocolloid materials (ih) after disinfection with glutaraldehyde. materials and methods ...

The aim of this study was to evaluate the physical properties of irreversible hydrocolloid materials poured immediately and after different storage periods. Four alginates were tested: Color Change (Cavex); Hydrogum (Zhermack); Hydrogum 5 (Zhermack); and Hydro Print Premium (Coltene). Their physical properties, including the recovery from deformation (n = 3), compressive strength (n = 3), and d...

OBJECTIVES This prospective clinical trial evaluated the longevity of direct resin composite (DRC) restorations made on stained dentin that is exposed upon removal of existing amalgam restorations in extensive cavities with severely reduced macro-mechanical retention for amalgam replacement. METHODS Between January 2007 and September 2013, a total of 88 patients (57 women, 31 men; mean age: 5...

This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-...

OBJECTIVES The purpose of this study was to evaluate the effect of three provisional cements and two cleaning techniques on the final bond strength of porcelain laminate veneers. METHODS The occlusal third of the crowns of forty molar teeth were sectioned and embedded in autopolymerizing acrylic resin. Dentin surfaces were polished and specimens were randomly divided into four groups (n=10). ...

OBJECTIVES The objective of this study was to evaluate the discolouration effects of artificial saliva, granule lemon juice, coffee (without sugar), coca cola, sour cherry juice, fresh carrot juice and red wine on resin-based composite materials that are commonly used in restorative dentistry. METHODS Colour of four brands of resin composites (Filtek Z 250 (3M Espe), Filtek Supreme (3M Espe),...