Three-year prospective clinical performance of a one-step self-etch adhesive and a nanofiller hybrid resin composite in Class V lesions.

PURPOSE: This 3-year prospective clinical study evaluated the clinical performance of a one-step self-etching adhesive (Futurabond NR) in combination with a nanohybrid composite (Grandio) for the treatment of different Class V cavities. METHODS: 122 restorations were placed in 42 patients (mean age of 54 +/- 13.2 years) evaluated according to modified Ryge-criteria at baseline, 6 months, 1, 2 and 3 years. The lesions comprised 91 Class V non-caries cervical lesions (NCCL) and 31 Class V cavities due to caries or restoration replacement. While carious lesions as well as restoration replacement required preparation of dentin, it was not roughened in case of NCCL. Macro-mechanical retention with undercuts was not used. The statistical analysis was carried out based on Bonferroni adjusted McNemar test (global alpha = 0.05) including the criteria marginal adaptation, color match, surface texture, anatomical form, retention and clinical acceptance and pain. The occurrence of secondary caries, preoperative and postoperative sensitivity was also examined. RESULTS: After 3 years of clinical service the restorations showed a significant deterioration of all studied parameters. After 3 years, 65% of the restorations were rated as excellent or acceptable in terms of clinical acceptance, 9% appeared tolerable and 26% were rated as not acceptable which mainly resulted from restoration losses. Within the observed timeframe the retention rate decreased to 75%, which means that 30 out of the 122 restorations were partially or completely lost. There was a difference in the 3-year retention rate of NCCL (71%) and the caries/restoration replacement group (87%) but it was not statistically significant.

[Controlled clinical study of the anterior composite-adhesive system Point 4/OptiBond Solo Plus]. / Klinisch kontrollierte Studie zum Frontzahnkomposit-Adhäsiv-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.