The concept of super enamel formation -Relationship between chemical interaction and enamel acid-base resistant zone at the self-etch adhesive/enamel interface

Dent Mater J. 2020 Aug 2;39(4):534-538. doi: 10.4012/dmj.2020-165. Epub 2020 Jul 4.

Abstract

Self-etch adhesive (SEA) systems simplify bonding procedures. It is believed that good mechanical retention and chemical bonding are both important factors to obtain reliable bonding to enamel. The enamel acid-base resistant zone (ABRZ) has been confirmed at the adhesive/enamel interface by scanning electron microscopic observation. However, the formation of enamel ABRZ is influenced by the type and components of adhesive systems. Chemical interactions by a functional monomer with hydroxyapatite strongly support the explanation of the mechanism for enamel ABRZ formation. The ABRZ created by MDP-containing SEA systems has shown good potential to resist acid attack from simulated recurrent caries models. In addition, fluoride release may enhance acid resistance. It has been proposed that such a reinforced enamel be termed "Super Enamel". The concept of the formation of super enamel may contribute to protecting enamel, and conserve tooth structure leading to improved restoration longevity.

Keywords: Acid-base resistant zone; MDP; Self-etch adhesive; Super enamel.

MeSH terms

  • Acid Etching, Dental*
  • Dental Bonding*
  • Dental Cements
  • Dental Enamel
  • Dentin
  • Dentin-Bonding Agents
  • Materials Testing
  • Microscopy, Electron, Scanning
  • Resin Cements
  • Surface Properties

Substances

  • Dental Cements
  • Dentin-Bonding Agents
  • Resin Cements