A study about improvment of the conversion rate of dual cure type resin cement with primer containing initiator.

近年来，对美观和自然外观的修复的需求已经扩展到后牙的修复。陶瓷材料用树脂粘固剂的发展使美观的后嵌体修复成为可能。然而，据报道，树脂粘固剂也出现了磨损，并成为故障的原因。因此，需要对树脂粘固剂进行改进，尤其是树脂与牙体的粘附力。本研究的目的是研究自酸蚀底漆中引发剂对树脂材料与牙体粘附性的影响。制备了两种实验性的自腐蚀底漆。一种是氨基酸衍生物的水溶液。采用氨基酸衍生物作为粘接单体和引发剂。另一种是马来酸和HEMA的混合物，氨基酸衍生物促进的拉伸粘结强度(3.4 Mpa)高于马来酸-HEMA的混合物。氨基酸衍生物与N-苯甘氨酸联用时，树脂转化率较高(1.2 Mpa)。氨基酸类化合物是自酸蚀底漆中有效的引发剂和促进剂

The demand for esthetic and natural-looking restoration has been extended to the restoration of the posterior teeth in recent years. The development of resin cement for ceramic materials have enable esthetic posterior inlay restoration. However, it was reported that the wear loss of resin cement was occur and it become cause of the trouble. Hence, the improvement of the resin cement, especially, adhesion of resin to tooth substrates was needed.The purpose of this study was to investigate the effect of the initiator in self-etching primer on the adhesiveness of resin materials to tooth. Two experimental self-etching primer was prepared. the one is aqueous solution of amino acid derivatives. An amine acid derivative was used as adhesion monomer and initiator. The other is the mixture of mareic acid and HEMA.The tensile bond strength promoted by amino acid derivative (3.4MPa) was higher than that promoted by mareic acid-HEMA mixture. (1.2MPa) The conversion rate of resin was high when used with conbination of amino acid derivatives and N-phenylglycine. The rate was increased with the time.We concluded that amino acid derivatives was effective for initiator and promoter in the self etching primer