[Dental pulp reactions and pulp protection: traditional underlayers versus dentin adhesive lacquer].

The dental pulp possesses an intrinsic healing capacity, by which pulpal reactions remain initially localised; they are often completely reversible. The younger and healthier the pulp is, the greater its healing capacity will be. Only in case of bacterial infection will the sterile pulpal inflammation convert into a local necrosis of the pulpal tissue that gradually will expand apically until the whole pulp is contaminated. The profit-effect of pulpal protection by means of traditional calcium hydroxide medicaments is compared with a more modern adhesive dentin sealing. Potential pulpal response to restorative materials and procedures are reviewed. Finally, clinical guidelines for optimal pulpal protection and dentinal sealing are formulated.