Controlled clinical study of the anterior composite-adhesive system Point 4/OptiBond Solo Plus

A wide variety of presently sold composites exhibit a large diverse range of colors and yield the desired esthetic result by the "Chameleon Effect" and by the application of a thin layer technique. The present clinical trial of the ultra-small-particle-hybrid composite Point 4 with its dentin adhesive OptiBond Solo Plus just reached the one-year evaluation. Of the originally applied 73 restorations of anterior teeth in the classes III to V, 62 could be re-examined after half a year and 60 after one year according to an examination scheme by Lutz et al. (1977) and Ryge (1980), modified by Böhm et al. (1991). While the color of restorations and the amazingly smooth surface only changed slightly, significant differences could be established in the criteria bond zone morphology and volume behaviour after half a year and one year compared with baseline. Results showed retention rates of 98% (2% total loss) and 97% (3% inclusive partial loss) as well as initial marginal discolorations of 20%. Thus, the moist-bonding technique, applied here, appeared less suitable than the wet-bonding technique.