Because of their high esthetic qualities and mechanical stability in the oral environment, ceramic restorations are commonly used in daily dental practice. Due to the inherently brittle nature of porcelain restorative materials, failure of metal ceramic restorations under intraoral conditions is not uncommon. The majority (65%) of failures are observed in the anterior region (60% in labial, 27% in buccal, 50% in incisal and 80% in occlusal regions). Clinical studies show failure rates upto 90% for ceramic veneers. Because it is arduous to remove the ceramic restorations from the mouth, they are repaired intraorally, using a bonding system and composite resins. It is necessary to know the possible causes of fracture of porcelain, the various bonding systems and the composites resins used for repairing. The current review takes into account the majority of papers published in the last few decades concerning the issue of bonding composite resins to porcelains.

Key Words: Porcelain fracture, bonding agent, ceramic repair, composite.