An in-vitro comparative evaluation of microleakage between giomer, compomer, composite and resin-modified GIC

Abstract

Introduction: The marginal ingress of oral fluids and bacteria between the tooth – restoration interface is termed as microleakage or marginal leakage. The ability to maintain an unfailing margin improves the durability of a restoration to a large extend. Aim: Aim of this study was to evaluate microleakage of a Giomer, Hybrid composite, Compomer and Resin Modified Glass Ionomer Cement (RMGIC) along the enamel and cemental margins of class V cavities. Materials and Methods: This in-vitro study was performed on 80 human maxillary and mandibular premolars which were extracted for orthodontic reasons. Class V cavities were prepared on the buccal surfaces of teeth centered on the Cemento Enamel Junction (CEJ). Teeth were divided into four groups of 20 each and restored with RMGIC, Giomer, Compomer and Hybrid composite and were subjected to thermocycling. Teeth were then immersed in 0.5% Methylene blue dye for 24 hours. They were sectioned longitudinally from the middle of cavity into mesial and distal parts. The sections were observed under stereomicroscope(SM) to evaluate microleakage at both enamel and cemental margins. Depth of dye penetration was measured using a scoring system. Statistical Analysis: The data was analysed using the one-way ANOVA (Analysis of variance) test. The result is considered statistically significant if the ‘p’ value obtained is Results: The microleakage values of Giomer, Compomer and Hybrid Composite do not differ significantly from each other at the enamel margins while the microleakage of RMGIC is significantly higher than the other three materials (p Conclusion: At the enamel margins, giomer, compomer and hybrid composite showed comparable microleakage values which were significantly lower than RMGIC. At the cemental margins, compomer and hybrid composite showed significantly lower microleakage values compared to giomer and RMGIC. All materials exhibited greater microleakage at the cemental margins than at the enamel margins.