Universal water-based medical and dental cement
AssigneeMinnesota Mining and Manufacturing Company
InventorsSumita B. Mitra, Smarajit Mitra
Life of this patent
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Abstract
Dental cement containing water, acid-reactive filler, water-miscible acidic polymer, an ethylenically-unsaturated moiety, photoinitiator, water-soluble reducing agent and water-soluble oxidizing agent. The cement has three curing modes, namely an acid-filler ionic reaction, a photoinitiated crosslinking reaction and a redox-initiated crosslinking reaction. The cement cures well in thick layers, and can be used without a dental curing light or with a light that is weak or defective.
Claims22
A water-containing, ionically-hardenable, photocurable, ethylenically-unsaturated dental cement, comprising
- a) finely-divided acid-reactive filler,
- b) water-miscible acidic polymer,
- c) photoinitiator,
- d) water-soluble reducing agent, and
- e) water-soluble oxidizing agent,
- wherein the reducing agent and the oxidizing agent are capable of initiating gelation of a 10:10:1 weight basis water:acrylamide:methylene bis-acrylamide mixture.
A dental cement powder, comprising finely-divided acid-reactive filler, a water-soluble reducing agent and a water-soluble oxidizing agent, at least one of the agents being microencapsulated, wherein the reducing agent and the oxidizing agent are capable of initiating gelation of a 10:10:1 weight basis water:acrylamide:methylene bisacrylamide mixture.
A dental cement liquid, comprising water-miscible acidic polymer, a water-soluble reducing agent and a water-soluble oxidizing agent, at least one of the agents being microencapsulated, wherein the reducing agent and the oxidizing agent are capable of initiating gelation of a 10:10:1 weight basis water:acrylamide:methylene bis-acrylamide mixture.
Dependencies are inferred from the claim text.