Clinical evaluation of a two-step etch&rinse and a two-step self-etch adhesive system in class II restorations: Two-year results

摘要

Objective: The purpose of this study was to compare the 2-year clinical performance of a two-step etch-and-rinse and a two-step self-etch adhesive system in Class II composite restorations.Materials and Methods: A total of 87 Class II restorations were placed in 33 adult patients ranging in age from 20 to 54 years. Each patient had at least one pair of posterior teeth that required a Class II restoration. A single experienced operator placed all of the restorations with rubber dam isolation, sectional matrix system, and incremental placement technique. The same composite, Filtek Z250, was used in all restorations. The two adhesive systems, which were randomly assigned, were Adper Single Bond, a two-step etch-and-rinse system, and Clearfil SE Bond, a self-etch primer system. A moist bonding technique-gentle air-drying without desiccating the dentin-was used for Single Bond. Clearfil was used according to its manufacturer's standard instructions-i.e., the enamel margins were not etched.