Abstract
The aim of this study was to establish and to seek out the best pretreatment procedure of an experimental two-bottle two-step self-etching adhesive system, by measuring micro tensile bond strength of the system to human molar sound dentin. The test specimens were divided into 5 groups, and adhesive was applied to adherent modifying manufacturer`s instruction, such as; altering the volume ratio or mixture timing of two liquids, and changing the air blow strength.