Fujita K, et al. - Experts evaluated the amounts of calcium salt of 10-methacryloyloxydecyl dihydrogen phosphate (MDP-Ca salt) and dicalcium phosphate dihydride (DCPD) with an amorphous phase developed during the application of commercial MDP-based all-in-one adhesives to enamel and dentin. Findings suggested a stronger dependence of the rate of MDP-Ca salt produced by the demineralization of enamel and dentin on the components that constitute commercial adhesive vs on the concentrations of MDP and water in the respective adhesive. This is because a slower production rate of MDP-Ca salt was demonstrated by HEMA-containing adhesive than HEMA-free adhesive in the enamel and dentin samples.