Influence of adhesive systems on the bonding of dental amalgam to glass ionomer cement.
BACKGROUND
Dental amalgam restorations have traditionally been retained in cavity preparations by surgical procedures called retention form. In this procedure healthy dental structure is usually removed to create adequate retention. The increasing use of bonding systems for restorative procedures may result in more conservative cavity preparations.


OBJECTIVE
The purpose of this study was to evaluate the tensile bond strength of the amalgam to glass ionomer cement under the influence of three adhesive systems (Panavia-EX, Vidrion F fresh mix, and Alpha Seal).


METHODS
The bonded assemblies were stored in an environment of 100% relative humidity and 37 degrees C for 24-hour and 30-day storage periods. The test specimen was loaded in tension 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 without 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 acid etch revealed no statistical difference among the adhesives. In the 30-day period without acid etch, the fresh Vidrion F adhesive recorded the greatest tensile bond strength.
Nobilo
M A
MA
Department of Dental Prosthetics, Piracicaba Dentistry School, Campinas State University, São Paulo, Brazil.
Consani
S
S
de Goes
M F
MF
D000269:Adhesives / Q000737:chemistry*; D003188:Composite Resins; D003723:Dental Amalgam; D001840:Dental Bonding / Q000379:methods*; D003736:Dental Cavity Lining; D003793:Dental Restoration, Permanent / Q000379:methods*; D005899:Glass Ionomer Cements; D008422:Materials Testing; D010710:Phosphates; D019279:Resin Cements; D013718:Tensile Strength; D017155:Wettability
D000269:Adhesives; D003188:Composite Resins; D005899:Glass Ionomer Cements; D010710:Phosphates; D019279:Resin Cements; C024804:TP 2206; C090880:Vidrion F; D003723:Dental Amalgam; C052304:Panavia EX