Bioreactive material for a prosthesis or composite implants

Details Bioreactive material for a prosthesis or composite implants Bioreactive material for a prosthesis or composite implants

1991-05-22

1992-06-09

Jones, W. Gary

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 33, 65 595, 65 181, 623 16, 501 3, 501 10, 106 35, 264 60, 264 16, C03B 100, C03B 1114, C03C 3078

Patent

active

051203405

ABSTRACT:
A method is disclosed for preparing an improved bioreactive material of the glass or partially crystallized glass type for bone prostheses or dental implants, which can be welded to bone tissue by chemical bonding. The material consisting essentially of, by weight, 5 to 14% Na.sub.2 O, 0 to 12% P.sub.2 O.sub.5, 49 to 57% SiO.sub.2, and balance, no more than 33% CaO+CaF.sub.2, the material containing 0.5 to 7% CaF.sub.2, and is prepared by a method comprising the steps of preparing a mixture of powders constituting a precursor of the material made of carbonates, phosphates, silica, oxides and fluorides, melting, homogenizing, casting and cooling the mixture to obtain an intermediate, non-crystallized glass, optionally annealing, and then grinding, either pressing the non-crystallized ground glass obtained cold to shape it, then sintering naturally or under a load after degassing, or sintering under a load directly after degassing, then cooling and optionally polishing or machining.

REFERENCES:
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patent: 3929971 (1975-12-01), Roy
patent: 3981736 (1976-09-01), Broemer
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patent: 4560666 (1985-12-01), Yoshida
patent: 4772436 (1988-09-01), Tyszblat
patent: 4775646 (1988-10-01), Hench
patent: 4851046 (1989-07-01), Low
patent: 4917702 (1990-04-01), Scheicher
patent: 5074916 (1991-12-01), Hench
Kingery W., Introduction to Ceramics, 1976, 2nd ed, p. 501.
Tooley, F. V., The Handbook of Glass Manufacture, 3rd ed, 1984, pp. 28-29.

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