Current status of dentin adhesive systems

Undoubtedly, dentin bonding agents have undergone a major evolution during the last several years. The shear bond strength of composite resin to the surface of dentin is actually greater than the inherent strength of the dentin itself under well-controlled conditions. No longer must the clinician depend only upon the bonding to enamel as the sole bonding mechanism. Bonding to both types of dental structure permits even better reinforcement of the tooth itself. Perhaps even more important than the high level of bonding exhibited by the current dentin adhesives is their ability to seal the dentin. So effective is this sealing capability that it is now possible to protect the pulpal tissue from microbial invasion through the dentinal tubules. Further, by enclosing the odontoblastic processes and preventing fluid flow, the potential for postoperative sensitivity is diminished considerably. In fact, so evolutionary is the concept of bonding that the procedures associated with the restoration of teeth has changed dramatically. Undoubtedly, far greater improvements can be anticipated in the future.