The bond strength of composite to enamel depends upon the depth the degree of demineralization, the number and length of resin tags and their surface area. Although both dentin and enamel are different in many aspects both equally contribute to the success of composite restoration. This article highlights the differences in bonding mechanism to enamel and dentin and their significance.

Keywords: Enamel; Bonding; Dentin; Hybrid Layer; Resin Tags.