PENETRATION OF AMALGAM CORRODED PRODUCTS INTO DENTIN AND ITS EFFECT ON BONDING USING SELF ETCH ADHESIVE SYSTEM VERSUS RESIN MODIFIED GLASS IONOMER

Abstract

Introduction: amalgam replacement by tooth-colored restorations has become a common procedure nowadays. Aim: this study was carried out to detect the effect of Penetration of amalgam corroded products into dentin on bonding of both self etch adhesives and resin modified glass ionomer (RMGI). Materials & method: 40 simple occlusal cavities were made in human extracted molars. Cavities were filled with amalgam, stored for one year then amalgam was removed and teeth were divided into two main groups (20 teeth each); group A; where amalgam was without any further increase in cavity depth. Group B; where amalgam was totally removed followed by further increase in cavity depth by 0.5 mm. each group was re divided according to the restorative material used to replace amalgam where group 1: resin composite with self etch adhesive, group 2: RMGI. Teeth were sliced and the interface was examined by scanning electron microscope coupled with EDAX. Results: amalgam remnants appeared at the interface of group A to interfere with bonding while it disappeared from the interface at group B. conclusion: increasing depth of the cavity by 0.5 mm after amalgam removal showed a more reliable interface for the subsequent tooth colored restoration.