A simple method of increasing the adhesion between resinous cements and tinplated gold alloys: a pilot study.
OBJECTIVE
This study: (1) tested 2 BIS-GMA resinous cements on tinplated gold alloy surfaces with shearing forces to record their bond strengths, and (2) determined whether storage of the tinplated surfaces in water before cementation affected initial bond strengths.


METHODS
The bond strengths of Panavia Ex and Panavia 21 resinous cements to tinplated Type III gold alloy were measured when subjected to shearing forces. Specimens were luted in pairs with these cements. In one group, the cementation was performed after tinplating procedures. In the other group, tinplated alloy surfaces were first stored in water at 37 degrees C for 48 hours before cementation.


RESULTS
A 3-fold increase in bond strength values was recorded for tinplated specimens stored in water before cementation with both cements, these differences were statistically significant. Storage of the specimen in water before cementation appeared to increase resistance of the alloy resin bond to failure with application of shearing forces.


CONCLUSIONS
This pilot study suggested that it would be advantageous to age tinplated gold alloy surfaces in water for 48 hours before cementation.
College of Medicine, University of Ibadan, Nigeria.
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Ogunyinka
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D020099:Coated Materials, Biocompatible; D001840:Dental Bonding; D004595:Electroplating; D006047:Gold Alloys / Q000737:chemistry*; D008422:Materials Testing; D010710:Phosphates / Q000737:chemistry; D010865:Pilot Projects; D019279:Resin Cements / Q000737:chemistry*; D013718:Tensile Strength; D014001:Tin; D014867:Water / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D006047:Gold Alloys; C093719:Panavia TPN-S; D010710:Phosphates; D019279:Resin Cements; D014867:Water; D017438:Bisphenol A-Glycidyl Methacrylate; D014001:Tin; C052304:Panavia EX