Bioactive cement

Patent 5145520 Issued on September 8, 1992. Estimated Expiration Date:

August 22, 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.

Abstract Claims Description Full Text

Patent References

Re33161

Water setting ion-polymer cements
Patent #: 4271057
Issued on: 06/02/1981
Inventor: Drake , et al.

Dental cement compositions
Patent #: 4591384
Issued on: 05/27/1986
Inventor: Akahane , et al.

Dental cement compositions
Patent #: 4647600
Issued on: 03/03/1987
Inventor: Kawahara , et al.

Process for the preparation of a hydroxyl apatite material Patent #: 4938938
Issued on: 07/03/1990
Inventor: Ewers, et al.

Inventors

Assignee

Kyoto University

Application

No. 570637 filed on 08/22/1990

US Classes:

106/35, Dental106/690, Phosphate based cement106/691, Specified filler or organic material containing423/308, Orthophosphate (e.g., calcium hydroxyapatite)423/309, Utilizing phosphoric acid or its anhydride as reactant423/311, Orthophosphate423/312, Alkali metal or ammonium containing433/226, By filling, bonding or cementing433/228.1By named composition

Examiners

Primary: Bell, Mark L.
Assistant: Bonner, Melissa

Attorney, Agent or Firm

Fleit, Jacobson, Cohn, Price, Holman & Stern

Foreign Patent References

0284074 EP. 09/13/1988
60-36404 JP. 02/13/1985
60-61512 JP. 04/13/1985
61-236644 JP. 10/13/1986
62-12705 JP. 01/13/1987
62-72363 JP. 04/13/1987
62-83348 JP. 04/13/1987
62-153204 JP. 07/13/1987

International Classes

A61C 005/04
C09K 003/00

Foreign Application Priority Data

1989-08-29 JP

Abstract

An excellent bioactive cement is provided which can chemically and firmly bond to teeth or bones of living bodies, adapt the shape of defected portions of bones or teeth of living bodies, harden quickly, and exhibit high initial strength, without forming inflammation to the surrounding tissue of living bodies. The bioactive cement is composed of glass powder comprising Ca as a main constituent, and an aqueous solution of ammonium phosphate as a hardening liquid for the glass powder, and is economical and stable without loosing the fixation between the artificial biomaterial and the bones or teeth of living bodies nor degradation thereof in the living bodies during a long period of use in the living bodies.