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.

In 2011, physical and operational changes were made to improve our institutionʼs dental human dock clinic. The physical change was consisted of aesthetic improvements to the comprehensive checkups being performed in individual rooms. The operational changes were improved diagnostic accuracy and increased the number of tests available to patients as part of the oral dock checkup, namely, adopting a test of caries risk (testing for bacteria that cause tooth decay), an IgG antibody titer test for periodontal pathogens using blood collected from the fingertip, a bite test and a halitosis test, as well as adding more staff members to the examination team. After these improvements were implemented, we conducted a survey to assess patient satisfaction at the clinic. The survey asked patients to provide their overall impression of the clinic and to rate facilities and equipment, dental care providers, clinical tests, evaluation reports and other aspects. A 10-point scale was used to rate overall impression and a 5-point scale was used to rate all other items. Survey forms were distributed to 74 patients who received the checkup and consented to participate, of which 46 responded (response rate: 62.2%). Patients were generally very satisfied with dental care providers and clinical tests as reflected by an average overall impression rating of 7.9. However, the average rating for facilities and equipment was low at 3.76. The other aspects category received the lowest rating, with cost being rated at 2.43. We plan to improve the clinicʼs operations by focusing on low scoring aspects of these findings.