EVALUATION OF SHEAR BOND STRENGTH OF COMPOSITE USING SELF-ETCH ADHESIVE AND PRIOR ETCHING WITH ORTHO PHOSPHORIC AND OTHER WEAK ACIDS:AN EX VIVO STUDY

Abstract

Objective: To evaluate and compare the shear bond strength of composite resin restoration on enamel using self-etch adhesive and after prior etching with Ortho phosphoric and other weak acids

Methodology : Self-etch adhesive was applied to the buccal surface of the teeth and composite resin was bonded using a customized mould in Group 1.In other groups, prior etching with orthophosphoric acid, citric acid, lactic acid, maleic acid and tartaric acid was done. Shear bond strength of all embedded samples were measured using a Universal Testing Machine and statistical analysis was done.

Results:  The decreasing order of mean shear bond strength is as follows:

Pre-etching with Phosphoric acid > Pre-etching with Maleic acid>Pre-etching with Citric acid> Pre-etching with Lactic acid> Pre-etching with Tartaric acid >Self-Etch Bonding Technique

Conclusion: Prior etching with any acid improves the bond strength of self-etch adhesive and  stronger the acid higher is the bond strength.