MeSH note : a dentin adhesive system consisting of an etchant (10% citric acid, 3% ferric chloride);
a primer, HEMA (2-hydroxyethyl methacrylate);and a bonding agent containing 4-META
(4-(2-(methacryloxyethoxy)carbonyl)phthalic acid anhydride), MMA (methylmethacrylate),
TBB (tri-n-butyl borane), and PMMA (polymethylmethacrylate);