Abstract

COELHO GOIATO, Marcelo et al. Evaluation of hardness in two impression techniques with condensation silicones under influence chemical disinfection with clorhexidine 2%.. Acta odontol. venez [online]. 2008, vol.46, n.1, pp.25-28. ISSN 0001-6365.

Elastomerics materials currently represent a major choice in the dental market as an impression material. The aim of this study was to asses Shore A hardness of two condensation silicones (Zetaplus - Zhermack and Clonage - DFL) using two impression techniques (putty and putty/wash) under influence of chemical disinfection with clorhexidine spray to 2% (for five minutes). Fifty-six specimens were made in metallic matrices, subdivided in 4 groups for each impression technique; half of each technique was submitted to chemical disinfection. Hardness test was performed with a durometer (GSD 709) according ASTM specifications (D-2240), the results were submitted to analyses of variance (ANOVA) and Tukey’s test (p<0.05). It was concluded that for all experimental condition, difference statistically significant was found.

Keywords : Condensation silicones; shore A hardness; chemical disinfection.