Development of adhesion system for one-step step bonding agent

为了测定MDP对牙本质或牙釉质脱矿产生的10-甲基丙烯酰氧癸基磷酸二氢(MDP)-钙（MDP- ca）盐的量，我们设计了一系列不同MDP用量的MDP基一步式胶粘剂。无假设：(1)牙本质与牙釉质脱矿产生的MDP-Ca盐量相同，(2)MDP-Ca盐的量对粘接性能没有影响。随着MDP含量的增加，MDP- ca盐的含量也随之增加。牙本质中MDP-Ca盐的产量是牙釉质的1.3倍。MDP和牙釉质反应物的主要物质是MDP的磷酸氢钙。而牙本质则同时产生MDP的磷酸钙和磷酸氢钙。MDP-Ca盐用量的增加会降低牙本质和牙釉质的结合强度。一步法自蚀刻胶中存在最佳的MDP浓度。

To determine the amount of 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-calcium (MDP-Ca) salt produced through demineralization of enamel or dentin by MDP, we designed a series of MDP-based one-step adhesives with different amounts of MDP. The null hypotheses were that (1) the amount of MDP-Ca salt produced through demineralization of enamel was the same as dentin, and (2) the amounts of MDP-Ca salt have no effect on the bonding performance. Increases in the amount of MDP resulted in the increased amount of MDP-Ca salt. The production amount of MDP-Ca salt of the dentin was 1.3 times higher than that of the enamel. The predominate species of the MDP and enamel reactants was a calcium hydrogen phosphate of MDP. In contrast, the dentin yielded both calcium phosphate and calcium hydrogen phosphate of MDP. Increases in the amount of MDP-Ca salt decreased both enamel and dentin bond strengths. An optimal concentration of MDP exists in one-step self-etch adhesive.