An in Vitro Comparative Evaluation of Microleakage of Conventional Gic & New Modified Glass Ionomer Cement Nanozirconia Silica Hydroxyapatite Restorative Material.

Introduction: The use of GIC as a luting agent, restorative material and base resulted in its popularity among dentists. Aim: The present study was conducted to compare the microleakage of conventional GIC with modified GIC‑nanoZrO2-SiO2-HA hybrid material. Materials & Methods: The present in vitro study was conducted on 80 freshly extracted maxillary first or second premolars. Teeth were divided into two groups of 40 each. In group I, conventional GIC restorative material was used and in group II, GIC‑nanoZrO2‑SiO2‑HA hybrid material was used. By dye penetration test microleakage was assessed at labial and lingual surfaces of teeth with stereomicroscope. Results: The mean microleakage in group I was 0.64± 0.13 and in group II was 0.89± 0.12. The mean difference in both groups found to be -0.43. Independent t- test showed significant difference between both groups (P< 0.01). Conclusion: The modified GIC‑nanoZrO2‑SiO2‑HA hybrid material exhibited higher microleakage as compared to conventional GIC.