الفهرس 
Adhesion and adhesive dentistryOnly 14 pages are availabe for public view
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Abstract
Postoperative tooth hypersensitivity is a common problem that plagues many dental patients. Clinical studies indicated that up to 30% of the tested cases reported postoperative sensitivity following application of posterior composite resin restorations. On the other hand, several desensitizers have been used to provide desensitization of the natural teeth.This in-vitro study studied the effect of adhesive systems which containing or accompanied by desensitizer on the shear bond strength of composite resin to dentin surface. 80 freshly extracted molars were utilized.The roots of each tooth were cut off 1mm below cemento enamel junction,the crowns were embedded in auto polymerizing resin inside a splitted metallic holder which have a fitting surface covered with a separating medium. The experimental occlusal surfaces had to be free of contamination by acrylic resin and were carefully trimmed using a diamond disc adapted to low speed hand piece under copious water coolant to expose clean flat dentin surfaces just below the DEJ, 600 Grit Wet Silicon Carbide abrasive papers were used to finish the dentin surface in a circular motion and to create a standarized smear layer.