Hardening material for medical and dental use
Patent 5238491 Issued on August 24, 1993. Estimated Expiration Date: 
August 24, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 24, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSurgical cement containing -tricalcium phosphate, poly(carboxylic acid) and water Preparation of collagen hydroxyapatite matrix for bone repair Physically stable composition and method of use thereof for osseous repair Inductive collagen-based bone repair preparations In situ calcium phosphate minerals method Patent #: 5047031 InventorsAssigneeApplicationNo. 474766 filed on 03/21/1990US Classes:106/35, Dental106/151.1With nonproteinaceous phosphorus compoundExaminersPrimary: Bell, Mark L.Assistant: Einsmann, Margaret Attorney, Agent or FirmForeign Patent References
International ClassC09K 003/00Foreign Application Priority Data1988-07-23 JPAbstractThis invention relates to a hardening material for medical and dental use which is composed of a powder of calcium phosphate and a hardening liquid.A subject of the present invention is to provide a hardening material wherein a calcified hard tissue analogous to body hard tissue capable of making chemically a sufficient bond with body hard tissue is formed in a body within relatively short time passage.To attain the above-described objective, the hardening material for medical and dental use relating to the present invention is composed of a calcium phosphate powder and a hardening liquid and also of at least either one of collagen and/or collagen derivatives in a state of powder or solution, and the calcium phosphate powder contains a powder of -tricalcium phosphate [-Ca3 (PO4)2 ]and/or tetracalcium phosphate [Ca4 (PO4)2 O] as an essential component and the hardening liquid comprises at least one acid selected from inorganic acids and acetic acid.Other References
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