Aim: To investigate the effect of 20% aluminium chloride and 20% ferric sulphate as haemostatic agents on shear bond strength of seventh generation bonding agent after the use of 0.2% Chlorhexidine solution as a cleansing agent.
Materials and Method: The occlusal enamel of fifty mandibular molars was removed to expose midcoronal dentin and mounted in autopolymerizing resin 1 mm apical to CEJ. Then the specimens were randomly divided into 5 groups (n=10):
Group 1, Optibond All in One (Kerr) bonding agent application
Group 2, Application of Hemostal+Optibond
Group 3, Application of Hemostal+Chlorhexidine rinse+Optibond
Group 4, Application of Viscostat+Optibond
Group 5, Application of Viscostat+Chlorhexidine rinse+Optibond
For all the groups, a composite resin rod was built up on the occlusal dentin surface and light cured and incubated followed by testing in universal testing machine.
Results: All groups showed statistically significant difference compared to Group 1. Significant difference was seen between Group 2 and Group 3 and also between Group 4 and Group 5.
Conclusion: Contamination with haemostatic agent decreases the shear bond strength of self etching adhesive to dentin. Chlorhexidine as rinsing agent partially recovers the shear bond of contaminated dentin.
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