SciELO - Scientific Electronic Library Online

 
vol.22 issue1Influence of the type of polypropylene on the photodegradation of blends of polypropylene/high impact polystyreneDevelopment and characterization of rigid, resorbable and osteoconductive membranes made of polyhydroxybutyrate and hydroxyapatite for periodontal regeneration author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Polímeros

Print version ISSN 0104-1428

Abstract

BUSATO, Priscilla do M. R. et al. Comparison of sorption and solubility properties of cements submitted to different solutions and storage times. Polímeros [online]. 2012, vol.22, n.1, pp. 69-72.  Epub Feb 09, 2012. ISSN 0104-1428.  http://dx.doi.org/10.1590/S0104-14282012005000008.

The aim of this study was to evaluate in vitro some properties of the resin cement Rely X U100 (3M ESPE), such as the sorption and solubility in water and a solution of alcohol 75% for periods of 7 and 15 days. The 60 samples were divided into three groups according to the cement used, and then divided into four groups according to the factors evaluated, type of solution and evaluation period. The samples were standardized with 8 mm diameter and 1 mm in thickness and light cured in polyester matrix, with the excess being removed with a scalpel blade. The samples were transferred to a greenhouse at 37 °C until reaching constant mass, referred to as M1. The samples were then immersed in solutions and stored for 7 and 15 days, after which they were weighed to get the mass M2. To reach a new constant mass, referred to as M3, the samples were again treated at 37 °C. The sorption and solubility were calculated using the equations (M2-M3)/V and (M1-M3)/V, respectively. The results were subjected to a two-way ANOVA procedure.

Keywords : Luting cements; resin modified ionomer cements; sorption; solubility.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese