Methods: Two HEMA-free (HF, G-Bond) and one HEMA/TEGDMA-free adhesive (cfm) were placed in Class V non-carious lesions and in class II restorations. Also a HEMA/TEGDMA free resin composite (els) was studied in class V and class II cavities in combination with HEMA/TEGDMA containing and -free adhesives. HEMA/TEGDMA containing control adhesives and resin composite materials were used as controls. Intraindividual differences were tested with Friedmans analysis of variance. Permission was obtained from the local ethical committee.
Results: In the class II cavities, the HEMA free adhesives showed no significant different durability compared to the control restorations at periods up to 4 years, with a 1.4% annual failure rate. In class V lesions the HEMA/TEGDMA free resin composite and the control fulfilled the clinical ADA guidelines for total acceptance. The HEMA/TEGDMA free adhesive fulfilled the provisional acceptance at the 6 months recalls.
Conclusion: The HEMA and TEGDMA free restorative systems give acceptable durability in short time evaluations.