Aims and Objectives: To assess and contrast reinforced glass ionomer cement with nanohydroxyapatite-silica, titanium di oxide, and ordinary glass ionomer cement in terms of microleakage, shear bond strength, and antibacterial activity. Materials and Methods: 45 removed premolar teeth had class v cavities for the examination of microleakage. Three groups were created from the samples. Regular GIC (GP 1), Nano hydroxyapatite GIC (GP 11), and GIC with TiO2 incorporation are all examples of GIC. The samples were maintained in a thermocycling machine after polishing. After that, nail polish was used to cover the teeth everywhere but the two millimeter boundary around the restoration margins. After soaking for 24 hours at room temperature in methylene blue solution (2%), they were examined under a microscope. The samples were washed in regular salt water and then dried naturally. After the teeth were anchored with acrylic resin, the samples were prepared for sectioning. The specimens were divided in half along their buccal and lingual surfaces. The stereomicroscope, set at 40x magnification, was used for the examination. Dye penetration into dentin and enamel was measured using a dye penetration scale.