INFLUENCE OF ADHESIVE SYSTEMS ON THE BONDING OF DENTAL AMALGAM TO GLASS-IONOMER CEMENT

Statement of problem. Dental amalgam restorations have traditionally b een retained in cavity preparations by surgical procedures called rete ntion form. In this procedure healthy dental structure is usually remo ved to create adequate retention. The increasing use of bonding system s for restorative procedures may result in more conservative cavity pr eparations. Purpose. The purpose of this study was to evaluate the ten sile bond strength of the amalgam to glass ionomer cement under the in fluence of three adhesive systems (Panavia-EX, Vidrion F fresh mix, an d Alpha Seal). Material and methods. The bonded assemblies were stored in an environment of 100% relative humidity and 37 degrees C for 24-h our and 30-day storage periods. The test specimen was loaded in tensio n to failure on a universal testing machine with a crosshead speed of 6 mm/min. Results. The results revealed that in the 24-hour period wit hout acid etch fresh Vidrion F and Panavia Ex adhesives were stronger than autopolymerizing sealant. Panavia Ex adhesive was stronger in the 24-hour period with acid etch. Conclusions. The 30-day period with ac id etch revealed no statistical difference among the adhesives. In the 30-day period without acid etch, the fresh Vidrion F adhesive recorde d the greatest tensile bond strength.