Orthopedic and dental implant ceramic composition and process fo

Details Orthopedic and dental implant ceramic composition and process fo Orthopedic and dental implant ceramic composition and process fo

1976-11-10

1979-04-17

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Dental

32 15, 106 63, C09K 300

Patent

active

041498933

ABSTRACT:
Disclosed is an orthopedic and dental implant ceramic composition comprising hydroxyapatite and whitlockite. Said composition is prepared by blending 50 to 99.5% by weight of a crystalline hydroxyapatite and 0.5 to 50% by weight of whitlockite, and then, sintering the blend at a temperature of 900.degree. to 1,400.degree. C. Said crystalline hydroxyapatite is prepared by the solid phase reaction wherein a mixture of a calcium phosphate, having a Ca/P ratio of 1.5 to 1.67 by mole, and a stoichiometric amount or more of a calcium compound is heated at a temperature of 500.degree. to 1,000.degree. C. Said calcium compound is at least one compound selected from the group consisting of CaCO.sub.3, CaO, Ca(OH).sub.2, CaF.sub.2, Ca(COO).sub.2, Ca(NO.sub.3).sub.2 and CaCl.sub.2.

REFERENCES:
patent: 2658832 (1953-11-01), De Ment
patent: 3379541 (1968-04-01), Tuvell
patent: 3787900 (1974-01-01), McGee

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