Method for preparing a calcium phosphate pasty material for...

Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Phosphorus or phosphorus compound

Reexamination Certificate

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C424S422000, C424S423000, C424S601000, C424S605000, C424S682000, C424S688000, C424S694000, C514S063000, C514S075000, C514S143000, C514S769000, C514S772000

Reexamination Certificate

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06923989

ABSTRACT:
A method for preparing a calcium phosphate pasty material for injection which after, setting, is designed to form an apatite material consists in: producing from water and calcium phosphates pasty mixture capable of developing, hardening and forming a hydroxyapatite. The method is characterised in that it consists in adding to the calcic phosphates or to the pasty mixture before it is injected a methicone having relative to the mixture more than 0.30 wt. % and less than 10 wt. %. The resulting material can be injected, that is it can be transported in pasty form into a conduit under moderate pressure levels. The material sets on the site of implantation and hardens to form an apatite biomaterial in a manner similar to known methicone-free calcium phosphate mixtures.

REFERENCES:
patent: 5522893 (1996-06-01), Chow et al.
patent: 0 276 836 (1988-08-01), None
patent: 0 684 046 (1995-11-01), None
patent: 2 776 282 (1999-09-01), None
XP-002154942, JP62122670, Jun. 3, 1987.

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