Hybrid layer as a dentin-bonding mechanism.
A number of mechanisms (both mechanical and chemical) have been proposed as the cause of dentin adhesion. Extensive research in Japan during the past 10 years has shown that strong, long-lived bonds between resin and living dentin will form when a monomer such as 4-META, which contains both hydrophilic and hydrophobic chemical groups, penetrates the tissue and polymerizes in situ. This resin-impregnation creates a transitional "hybrid" layer, that is neither resin nor tooth, but a hybrid of the two. The thin layer of resin-reinforced dentin locks the two dissimilar substances together on a molecular level, sealing the surface against leakage and imparting a high degree of acid resistance.
Nakabayashi
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N
Institute for Medical and Dental Engineering, Tokyo Medical and Dental University.
Nakamura
M
M
Yasuda
N
N
D000180:Acrylic Resins; D001896:Boron Compounds; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry*; D003804:Dentin; D006801:Humans; D008689:Methacrylates / Q000737:chemistry*; D020366:Methylmethacrylate; D008768:Methylmethacrylates
D000180:Acrylic Resins; C070606:Amalgambond; D001896:Boron Compounds; D003738:Dental Cements; D008689:Methacrylates; D008768:Methylmethacrylates; C009523:tri-n-butylborane; D020366:Methylmethacrylate; C031172:4-META resin; C049495:Super-bond