Scanning electron microscopy revealed partial removal of the smear layer or an etching effect of dentin as a result of the application of hemostatic agents on dentin .
PRACTICAL IMPLICATION S Adhesive procedures may be affected adversely when performed on dentin and enamel contaminated by hemostatic agents .
Hemostatic agents may induce changes in the dentin surface morphology .
The results of this review indicate that the bond strength of self-etching adhesive systems is affected more negatively than is that of etch- and -rinse systems .
BACKGROUND Hemostatic agents have been used clinical ly in dentistry for many years to control bleeding .
Effect of ViscoStat and ViscoStat Plus on composite shear bond strength in the presence and absence of blood.
PURPOSE To examine the effects of the hemostatic agents ViscoStat and ViscoStat Plus on the shear bond strength ( SBS ) of composite resin ( CR ) to dentin in the presence and absence of blood . MATERIAL S AND METHODS Sixty permanent teeth mounted in acrylic were r and omly divided into 5 groups ( n = 12 ) : ( 1 ) control , C ; ( 2 ) ViscoStat , VS ; ( 3 ) ViscoStat Plus , VS+ ; ( 4 ) ViscoStat and blood , VS/B ; ( 5 ) ViscoStat Plus and blood , VS+/B. Groups 2 and 3 were exposed to VS and VS+ , respectively . Freshly drawn human blood was placed on groups 4 and 5 immediately followed by VS and VS+ , respectively . Specimens remained undisturbed for 1 min and were rinsed with tap water for 1 min . All groups were etched with 35 % phosphoric acid and were bonded utilizing the Ultradent bonding clamp , Optibond Solo Plus , and Z-250 composite resin . Following water storage for 48 hrs at 37 degrees C , specimens were debonded in an Instron test frame at a crosshead speed of 0.5 mm/min . Statistical analysis was done with one-way analysis of variance . RESULTS The mean SBS+/-SD in MPa were C : 44.2+/-4.8 , VS : 42.3+/-8.7 , VS+ : 46.2+/-7.8 , VS/B : 43.0+/-6.4 , VS+/B : 44.0+/-8.1 . ANOVA revealed no significant difference ( p > 0.05 ) between SBS of VS or VS+ and the control with or without blood present . ostatic CONCLUSION This controlled laboratory study concluded that the use of ViscoStat or ViscoStat Plus as a hem agent does not have a significant effect on the shear bond strength of composite resin to dentin when using Optibond Solo Plus
Scanning electron microscopy revealed partial removal of the smear layer or an etching effect of dentin as a result of the application of hemostatic agents on dentin .
PRACTICAL IMPLICATION S Adhesive procedures may be affected adversely when performed on dentin and enamel contaminated by hemostatic agents .
Hemostatic agents may induce changes in the dentin surface morphology .
The results of this review indicate that the bond strength of self-etching adhesive systems is affected more negatively than is that of etch- and -rinse systems .
BACKGROUND Hemostatic agents have been used clinical ly in dentistry for many years to control bleeding .