Dental adhesive
AssigneeProduits Dentaires Pierre Rolland
InventorsVincent Maurat, Clemence Pigeron
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Abstract
A dental adhesive comprises at least one polymerizable monomer, a polymerization initiator, and thermo-expandable particles comprising a shell encapsulating an expansion agent, the dental adhesive being characterized in that the shells of the thermo-expandable particles are made of a copolymer of acrylonitrile and methyl methacrylate.
Claims20
A dental adhesive comprising:
- at least one polymerizable monomer,
- a polymerization initiator, and
- thermo-expandable particles comprising a shell encapsulating an expansion agent, wherein the shells of the thermo-expandable particles are made of a copolymer of acrylonitrile and methyl methacrylate,
- wherein the polymerizable monomer(s) is/are selected from the group consisting of:
- bisphenol A glycidyl dimethacrylate;
- triethylene glycol dimethacrylate;
- polyethylene glycol dimethacrylate;
- diurethane dimethacrylate;
- and mixtures of such monomers, and
- wherein upon polymerization the dental adhesive adheres to a surface of a tooth so as to fasten an orthodontic appliance to the surface of the tooth or to close a cavity in the tooth.
A method of unsticking a polymerized dental adhesive fastened to the surface of a tooth, said polymerized adhesive comprising at least a resin and thermo-expandable particles having a shell formed by a copolymer of acrylonitrile and methyl methacrylate encapsulating an expansion agent, wherein the polymerized adhesive is unstuck by applying ultrasound vibration to the polymerized adhesive.
A method of unsticking a polymerized dental adhesive fastened to the surface of a tooth, said polymerized dental adhesive comprising at least a resin and thermo-expandable particles having a shell formed by a copolymer of acrylonitrile and methyl methacrylate encapsulating an expansion agent, said method comprising applying ultrasound vibration to the polymerized dental adhesive.
Dependencies are inferred from the claim text.