It was concluded that the curing efficacy of the LED lamp was comparable to that of conventional halogen lamp, even with a 50% reduction in cure time, and resin composite (Filtek Z-250) presented the highest hardness values, whereas complete hardening of resin-modified glass ionomer cement (RMGIC) (Vitremer) was observed because of its self-curing system even after the removal of light source.

Background: Air drying is considered the most simple and effective method to achieve solvent evaporation. The present study was conducted to assess Impact of various dentinal drying methods on the adhesion of glass ionomer restorations to primary teeth. Materials & Methods: 90 primary teeth of both genders were grounded to a flat dentinal surface. Specimens were randomly divided into three groups. Group I were subjected to air dry, group II to blot dry, and group III to suction dry. Each group comprised of 30 teeth. 10 specimens from each group were dried for 2 seconds, 5 seconds, and 10 seconds. Results: Group I teeth were subjected to air dry, group II to blot dry, and group III to suction dry. Each group comprised of 30 teeth. The mean shear bond strength at 2 seconds, 5 seconds, and 10 seconds in group I was 3.2, 5.4 and 5.3 respectively. The mean bond strength was 2.6. 3.5 and 4.6 in group II and 3.1, 4.2 and 4.0 in group III respectively. The difference was significant (P< 0.05). Conclusion: The maximum shear bond strength of the glass ionomer restoration was observed in the air?dry group.