SHEAR BOND STRENGTH AND QUANTITATIVE MICROLEAKAGE OF A MULTIPURPOSE DENTAL ADHESIVE SYSTEM RESIN-BONDED TO DENTIN

The shear bond strengths of a dental bonding system used in conjunctio n with a composite resin bonded to dentin were determined 1 minute aft er irradiation and after storage in saline at 37 degrees C for 24 hour s, 1 week without and with temperature cycling, and 4 weeks without an d with temperature cycling. The quantitative microleakage of class V p reparations in cementum (dentin) restored with the system was determin ed by a spectrophotometric dye-recovery method. Excellent shear bond s trengths ranging from 13.9 MPa (1 minute) to 19.5 MPa (1 week) were ob tained. The shear bond strengths and quantitative microleakage of the multipurpose dental adhesive system compared favorably with the data o btained from other dental bonding systems under similar experimental c onditions.