IADR Abstract Archives
Effect of Blood and Hemostatic Agent Contamination on Bonding Strength of Reinforced Glass Ionomer Cement to Resin Composite: Vitro Study
Objectives: The purpose of this study was to evaluate the shear bond strength of total-etch and self-etch adhesive system in blood and hemostatic agent containing 25% Aluminum Chloride (ViscoStat® Clear, Ultradent, USA) of contaminated reinforced glass ionomer cement (RMGIC) to resin composite.
Methods: Sixty cylinder of acrylic resin were prepared to have 2 mm high and 4 mm diameter hole. RMGIC (Fuji II LC® Capsule, GC, Japan) was placed into the prepared hole prior grounded by 600 grit SiC paper for a minute. Samples were divided into 2 groups according on the adhesive systems, total-etch and self-etch. In each group, subgroups were divided based on contaminations, control group, hemostatic agent contamination and blood contamination. Contamination was done on RMGIC surface for 60 seconds and rinsed before bonding procedure. After resin composite was polymerized, samples were stored in 97% humidity for 24 hours prior to shear bonding strength and failure mode examination evaluation.
Results: Hemostatic agent contamination showed significantly lower bonding strength than blood contamination (p=0.04) and control group (p=0.01), with no significantly different between blood contamination and control group (p>0.05). Self-etch system showed significantly higher bond strength than total-etch system in hemostatic agent contamination (p<0.01) and control group (p=0.02), but not for blood contamination (p>0.05). Failure mode observation on hemostatic agent contamination group presented adhesive failure. However, blood contamination group presented prominently cohesive failure and mix failure mode was prominently in other groups.
Conclusions: Hemostatic agent contamination reduced shear bond strength in bonding of RMGIC to resin composite. Application of total-etch system in hemostatic agent contamination was not recommended and self-etch system could be used to restore shear bond strength in contaminated RMGIC of sandwich technique.
Methods: Sixty cylinder of acrylic resin were prepared to have 2 mm high and 4 mm diameter hole. RMGIC (Fuji II LC® Capsule, GC, Japan) was placed into the prepared hole prior grounded by 600 grit SiC paper for a minute. Samples were divided into 2 groups according on the adhesive systems, total-etch and self-etch. In each group, subgroups were divided based on contaminations, control group, hemostatic agent contamination and blood contamination. Contamination was done on RMGIC surface for 60 seconds and rinsed before bonding procedure. After resin composite was polymerized, samples were stored in 97% humidity for 24 hours prior to shear bonding strength and failure mode examination evaluation.
Results: Hemostatic agent contamination showed significantly lower bonding strength than blood contamination (p=0.04) and control group (p=0.01), with no significantly different between blood contamination and control group (p>0.05). Self-etch system showed significantly higher bond strength than total-etch system in hemostatic agent contamination (p<0.01) and control group (p=0.02), but not for blood contamination (p>0.05). Failure mode observation on hemostatic agent contamination group presented adhesive failure. However, blood contamination group presented prominently cohesive failure and mix failure mode was prominently in other groups.
Conclusions: Hemostatic agent contamination reduced shear bond strength in bonding of RMGIC to resin composite. Application of total-etch system in hemostatic agent contamination was not recommended and self-etch system could be used to restore shear bond strength in contaminated RMGIC of sandwich technique.