Background: Packable resin-based composites and simplified resin bonding systems are marketed to offer many advantages over conventional posterior hybrid composites and total-etch bonding systems. The authors conducted a study to evaluate the initial clinical performances of a packable and a conventional hybrid resin-based composite used with a simplified bonding system.
Methods: A total of 57 Class I and 45 Class II restorations were placed in the permanent teeth of 65 adult patients.