Akademik Veri Yönetim Sistemi
MATERIALS RESEARCH INNOVATIONS, cilt.14, sa.4, ss.301-305, 2010 (SCI-Expanded)
The aim of this study was to determine whether pH and storage time have any influence on the sorption and solubility behaviour of carboxylate and resin cements. Disc shaped specimens with a size of 15x0.5 mm were prepared according to the specifications of each manufacturer and desiccated to a constant mass. A total of 80 specimens were prepared and divided into four groups (20 specimens for each cement). The specimens were stored in artificial saliva that has different pH values of 4, 5.5 and 7 at 37 degrees C for 3 months. After 24, 48 h and 7, 15, 30, 45, 60, 75 and 90 days consecutively, the specimens were taken out of the distilled water and dried in a desiccator for 30 min to reweigh. The weight changes of these specimens after water immersion were measured using an electronic analytical balance and adjusted according to the water solubility measured at the same time. The difference between the first and second measurements was recorded as the total amount of material removed. The results were analysed by univariate ANOVA and Duncan's test at p<0.05. It was detected that the type of the cement and storage time are statistically significant (p<0.001). However, storage media were not statistically significant. Results show that the resin luting cement (Panavia F) had significantly less water sorption than the other luting cements evaluated. There were significant differences among the materials (p<0.001).