Dentine bonding agents
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Dentine bonding agents are resin materials used to make a composite filling material adhere to the dentin. The term Dentine bonding agent is almost obsolete with the advent of newer materials which bond to both dentin and enamel.
Bonding agents are methacrylates with some volatile carrier and solvent like acetone. They also contain some diluent monomers, most typically HEMA and TEGDMA, but occasionally UDMA. This makes the bonding agent flow deep in the irregularities in the cavity surface and the irregularities formed by acid etching of the tooth.
Dentine Bonding agents typically went through several generations of development, involving different combinations of Etch, Primer and Bond. There has been a trend towards combining these with each successive generation, to such a stage that there are now Bonding agents combining all three eg. Oneup Bond F and G-Bond.
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