A Comparative Study Of Bonding Characteristics Between Self-etching And Total-etching Adhesives

Bonding techniques are widely used in modern dentistry. It has not only facilitated the clinical procedures, but also produced more conservative techniques of restoration and met growing needs for aesthetics of patients. Dentin bonding is always difficult due to the peculiar structure of dentin.The effect of dentin bonding has been improved significantly with the constant introduction of new adhesion strategies and the updating of adhesive systems. The "total-etching" concept and adhesives developed from this concept greatly increased dentin bond strength. However, their unpredictable postoperative tooth sensitivity puzzled the clinicians. This problem has been well-solved with the appearance of "self-etching" adhesives. In view of the convenient application, time saving, reduction of postoperative sensitivity and some other advantages, self-etching adhesives have gained great attentions from researchers and clinicians all over the world.As a new kind of material, self-etching adhesives are not so widely used in clinics due to the limited knowledge of their bonding characteristics. In China, there are few researches on self-etching adhesives, even few in clinical applications. The main problems of developing and applying self-etching adhesives are whether they could gain the same bond strength as the total-etching adhesives and whether they could reduce marginal microleakage efficiently. In this study, we aimed at examining above bonding characteristics of two self-etching adhesives in comparison with two total-etching adhesives...