To Evaluate the Effect of Surface Coating on Three Different Types Glass Ionomer Restorations
Sukumaran. V.G1 , Mensudar. R2*1Professor, Department of Conservative Dentistry, Sree Balaji Dental College and Hospitals, Bharath University, Pallikarani, Velachery, Chennai – 600100 2Professor and Head of the Department, Department of Conservative Dentistry, Sree Balaji Dental College and Hospitals, Bharath University, Pallikarani, Velachery, Chennai – 600100
Abstract: Glass Ionomer Cement has been widely used since their introduction by Wilson and Kent (1971) in a wide variety of clinical applications in dentistry. Since water plays a key role for proper maturation of GIC, its physical properties can be compromised by both water contamination and dehydration during the initial setting stages. To prevent these, water exclusion is recommended during this vulnerable setting stage. So, the aim of this study was to investigate the effect of G-Coat plus (nanofilled self-adhesive light cured resin) on both conventional and RMGIC by evaluating the mechanical properties (compressive strength (CS), flexural strength (FS), surface hardness (SH)) on three different types of GIC (Type II, Type XI, and Fuji LC). Two conventional GIC (Type II and Type IX) and one RMGIC were used in this study (Group I – III) respectively. The three groups were subdivided into Subgroup A and B. Each group contained 30 samples, thus a total of 216 samples were prepared. Among the 72 samples in each group, 12 samples were used to evaluate CS, 12 samples for FS, and the remaining 12 samples were used for surface hardness. The samples were then tested to investigate the effect of surface coating by evaluating their mechanical properties. The values obtained were tabulated and analysed by Independent sample t-test and ANOVA followed by Post-hoc; Tukey’s B test (Table I to III). Comparison of subgroups in Type II, Type XI and Fuji LC indicate that the mean values of the two groups, namely No coat and G coat, are different in all three types of GIC ( FIG I and FIG II) in their mechanical property. Comparing among the groups, the samples coated with G-coat plus showed a higher value for all types of cements. Within the limitation of this study, it has been shown that the samples that where protected with light cured self adhesive coating (G-coat plus) exhibited an increased mechanical strength when compared to the unprotected samples. Further long-term study is needed to check the longevity of the material in simulated oral environment.
Keywords: G-coat plus; glass ionomer cement; flexural strength; surface hardness; compressive strength Back to TOC