Authors: Guru VISHNU, Ganesh JEEVANANDAN

Abstract:

Introduction: The presence of a gap between the tooth that has been prepared and the crown that has been cemented can lead to a phenomenon known as microleakage. This occurrence facilitates the entry of microorganisms into the area, which can subsequently result in the degradation of the luting cement. In order to achieve an optimal fit, it is important to consider some factors, such as the type of crown utilized, the taper of tooth preparation, and the choice of the cementing agent. Aim: The primary objective of this study is to evaluate the extent of microleakage observed in zirconia crowns that have been bonded using glass ionomer cement, self-adhesive resin cement and resin-modified glass ionomer cement. Materials and methods: Forty five primary mandibular molars were carefully categorized into three groups for the treatment. Group I was treated with glass ionomer cement, Group II received resin modified glass ionomer cement, and Group III underwent treatment with self adhesive resin cement. These cements were used for luting the tooth with  Kedo zirconia crowns. The restored samples underwent thermal cycling and were assessed for microleakage under a stereomicroscope.  Statistical analysis SPSS version 23.0 was used. Expressions for descriptive statistics included frequency and percentages. Analytical statistics, including the Mann Whitney U test, were employed to evaluate the variations in the level of microleakage among the groups, with a significance level set at p<0.05. Results and discussion: The Mann Whitney U test findings indicate no statistically significant distinction in the level of microleakage between Glass Ionomer Cement (GIC) and Resin Modified Glass Ionomer Cement (RMGIC) cements (p=0.072). However, a comparison between the GIC and Self-adhesive resin cement revealed that the latter had much less microleakage than the former (p=0.000). It was observed that both RMGIC (Resin Modified Glass Ionomer Cement) and Self-adhesive resin cement exhibited a higher level of microleakage, compared to Self-adhesive resin alone (p=0.001). Conclusions: Mandibular first molar cemented with kedo zirconia crown had highest microleakage when luted with GIC, followed by RMGIC, and was lowest when luted with self-adhesive resin cement.

Keywords: glass-ionomer cementmilk teethprimary molarsthermocyclingtooth coloured crown

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