Research about the adhesion fatigue of the resin material to dentin and enamel

通过使用各种粘结系统，制备各种复合树脂以粘附到牙本质表面和牙釉质表面。将这些树脂在水中长时间保持后，检查粘合强度。在大多数粘接系统中，由于长时间放置在水中，其对牙本质侧的粘接强度显著下降。虽然在水中保持很长时间，但对釉质侧的粘合强度已明显下降。至于样品在水中保存三年后的粘合强度，正在进行检查。由于它在渗透到牙本质时在口腔中变湿的条件下具有优异的性质，因此在粘合早期可以容易地获得高粘合强度的基于HEMA的粘合系统被用于许多粘合系统。然而，指出这种HEMA的防水性存在缺陷。在口腔内的基于HEMA的粘合系统被认为是由于其决定长时间暴露于水中的粘附而逐渐恶化的可能性。当使用以提高耐水性为目的开发的实验底漆时，直到储存两年才发现在水中粘合强度的下降。它认为，通过使用这样的耐水性底漆，可以提高粘合强度的长期稳定性，这对未来的粘合系统开发很重要。

Various composite resins were made to adhere to the dentin surface and the enamel surface by using various bonding systems. An adhesive strength was examined after these specimems were kept for a long time during the water. The adhesive strength that it faced on the dentin side declined remarkably by keeping it for a long time during the water in most bonding systems. An adhesive strength toward the enamel side haedly declined though it was based on keeping it for a long time during the water toward this. As for the adhesive strength as well after specimen is kept during the water until three years, it is being examined. Because it has excellent nature on the condition that it became wet in the oral cavity in the permeation to the dentin, HEMA-based bonding system that a high adhesive strength can be easy to get in the adhesion early days is being used as for many bonding system. However, it is pointed out with this HEMA that water-resistancy has a fault. The possibility which deteriorates gradually because it decides to be exposed to the adhesion rest in the water for a long time is thought HEMA -based bonding system inside the oral cavity. When the experimental primer developed for the purpose of the improvement of water resistance was used, the decline of the adhesive strength wasn't recognized in the water until a storage period two years.It thought with the thing which gave it the suggestion that the fact that the stability of the adhesive strength of a long time could be improved by using water-resistant PRIMER like this was important to future bonding systems development.