Enamel composition is 97 wt.% nano-hydroxyapatite (nHAp™) and 3 wt.% organic material and water. In dentin, the nHAp™ represents 65 wt.%.
nHAp™ is the main component of enamel, so it gives an appearance of bright white and eliminates the diffuse reflectivity of light by closing the small pores of the enamel surface.
nHAp™ mimics the size of natural dentinal hydroxyapatite or enamel apatite. Experimental results demonstrate the advantages of nHAp™ in enamel repair, which has led to its incorporation in toothpaste to promote the restoration of demineralized enamel or dentin surfaces by depositing hydroxyapatite nano-particles in the defects.