Comparative Evaluation of Shear Bond Strength and Microleakage of Three Different Restorative Materials in Primary Molar Teeth: An In Vitro Study.

Background: In minimally invasive dentistry, adhesive restorative materials are widely used both as bulk restoratives and for the repair of occlusal, proximal, cervical, and multisurface cavities. These consist of conventional, modified glass ionomers, compomers, composites, and new alkasite materials. Few investigations have focused on comparing the in vitro behavior of recently developed restorative materials. Aim: To compare and assess the microleakage and shear bond strength (SBS) of 3M ESPE Composite (Filtek Z350 XT), Kids-e-Restore, and Cention N in primary molar teeth. Materials and methods: This experimental investigation was divided into three groups: Cention N was in group I, Kids-e-Restore was in group II, and 3M ESPE composite (Filtek Z350 XT) was in group III. Shear bond strength testing was done by a universal testing machine. The maximum load was recorded during the testing. Samples were analyzed through a stereomicroscope to evaluate bond failure mode. Dye penetration was used to assess microleakage, and a stereomicroscope was used for examination. Results: 3M Filtek Z350XT had the highest SBS, and Cention N had the lowest. Kids-e-Restore showed the least amount of microleakage, then by Cention N and 3M Filtek Z350 XT. Conclusion: Composite resin (3M Filtek Z350 XT) has better SBS than Cention N and flowable GIC (glass ionomer cement) (Kids-e-Restore) in primary molar teeth. Flowable GIC (Kids-e-Restore) showed less microleakage and is a good adjunct for class II restorations. How to cite this article: Dadpe MV, Kendre UR, Kale YJ, et al. Comparative Evaluation of Shear Bond Strength and Microleakage of Three Different Restorative Materials in Primary Molar Teeth: An In Vitro Study. Int J Clin Pediatr Dent 2025;18(11):1349-1353.