Patent ID: 8609741
Filing Date: 2013-12-17
Classification: A61K

Abstract:
1. A dental restorative method comprising the steps of: (1) applying a dental primer composition comprising at least one first volatile solvent to a tooth structure; (2) thereafter applying a dental adhesive composition comprising at least one second volatile solvent to the tooth structure; (3) drying the dental adhesive composition to remove the at least one second volatile solvent; and (4) hardening the dental adhesive composition by light-curing the dental adhesive composition; wherein the dental primer composition further comprises: at least one acidic polymerizable monomer selected from the group consisting of phenyl methacryloxyethyl phosphate, glyceryldimethacrylate phosphate, dipentaerithritol pentaacrylate phosphate, methacryloyloxydecyl phosphate, and hydroxyethylmethacrylate phosphate; and wherein the dental adhesive composition further comprises: (i) at least one non-acidic polymerizable monomer having at least one ethylenically unsaturated group; (ii) at least one acidic compound having at least one ethylenically unsaturated group and at least one acidic moiety selected from the group consisting of carboxylic acid, carboxylic acid anhydride, phosphonic acid or its salt or ester derivatives, phosphoric acid or its salt or ester derivatives, and combinations thereof, (iii) at least one photoinitiator, and (iv) about 0-40% by weight of one or more fillers; wherein when the adhesive composition comprises at least one acidic compound the weight ratio of non-acidic polymerizable monomers/acidic compounds in the dental adhesive composition is more than 4.5; the viscosity of the dental adhesive composition is less than 350 centipoise (cP) at 25° C.; and the dental adhesive composition excluding solvent and filler has an acid number of less than 0.75 mmol NaOH/g; and wherein the hardened dental adhesive has a film thickness less than 30 microns.