In vitro comparative study of sorption and solubility of three modified glass ionomer cements

Abstract

Aim: To evaluate and compare the sorption and solubility of three modified glass ionomer cements –Glass Hybrid Restorative System (Equiaforte), Zirconomer Improved and resin modified glass ionomer cement (RMGIC) in artificial saliva. Materials And Methods: A total of 45cylindrical specimens (4mm diameter and 6mm height) were prepared for each material following the manufacturer’s instructions. After subjecting the specimens to thermocycling of 500 cycles between 5 and 55 degree Celsius with the dwell time 15secs,45 specimens evaluated for sorption and solubility, first weighing them by a precision weighing scale (W1), then immersing them in artificial saliva for 28days and weighing them(W2), and finally dehydratingin an oven for 24 hours and weighing them(W3). Since the obtained values show normal distribution differences between the groups data were analyzed using the one way analysis of variance (ANOVA). For pairwise evaluation between the groups post hoc dunnet t3 test was used. Results: The sorption and solubility values in artificial saliva were minimum for zirconomer improved glass ionomer cement with the mean value of sorption 52.91 ± 1.73 µg/mm3 and solubility 10.47 ± 1.52 µg/mm3 when compared with other groups.The difference between groups was found to be statistically significant (p<0.05) in terms of sorption and solubility.