Determination of molecular species of calcium salts of MDP produced through decalcification of enamel and dentin by MDP-based one-step adhesive.
Enamel and dentin particles were added to an experimental 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based one-step adhesive to react for 30 s. After enamel and dentin reactants were analyzed using X-ray diffraction (XRD) and phosphorus-31 nuclear magnetic resonance ((31)P NMR) techniques, curve-fitting analysis was performed on the (31)P NMR spectra of enamel and dentin reactants. By varying the molar ratio of calcium chloride to MDP, a series of three types of MDP-Ca salts were synthesized. The molecular species of calcium salts of MDP (MDP-Ca salts) produced by decalcification of enamel or dentin were determined based on the XRD and (31)P NMR analysis results of these three types of synthesized MDP-Ca salts. Curve-fitting analysis showed that enamel and dentin developed several types of MDP-Ca salts and amorphous dicalcium phosphate dihydrate (DCPD) during decalcification. The molecular species of MDP-Ca salts produced by enamel and dentin were mono-calcium salts of MDP monomer and MDP dimer. In addition, dentin produced a di-calcium of MDP dimer.
Nihon University Graduate School of Dentistry at Matsudo; Department of Renascent Dentistry, Nihon University School of Dentistry at Matsudo, 870-1 Sakaecho, Nishi 2, Chiba 271-8587, Japan.
Yoko
Y
Yokota
Norihiro
N
Nishiyama
D002118:Calcium / Q000032:analysis*; D003804:Dentin / Q000737:chemistry; D008279:Magnetic Resonance Imaging; D008689:Methacrylates / Q000737:chemistry*; D010758:Phosphorus; D012492:Salts / Q000032:analysis; D017001:Tooth Demineralization / Q000175:diagnosis; D014961:X-Ray Diffraction / Q000379:methods
D008689:Methacrylates; D012492:Salts; D010758:Phosphorus; C069749:methacryloyloxydecyl dihydrogen phosphate; D002118:Calcium