Moldable bone-implant material

Details Moldable bone-implant material Moldable bone-implant material

1985-08-27

1987-02-24

McNeill, Gregory E.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

A61F 228

Patent

active

046455035

ABSTRACT:
A moldable bone-implant material containing between about 65%-95% hard filler particles and a binder composed of between about 35%-5% of a biocompatible, biodegradable, thermoplastic polymer which has fluidic flow properties at or below about 60.degree. C. One preferred binder is polylactic acid having a molecular weight between about 400 and 5,000 daltons, and a preferred hard filler is hydroxylapatite. In use, the material is warmed to a temperature which allows molding, and the bone site is filled with the moldable material, which then forms a contour-fitting, semi-rigid implant. The implant retains its contour fit and acquires a rigid final state as the binder in the implant is gradually biodegraded and replaced through tissue ingrowth from the surrounding bone site.

REFERENCES:
patent: 4024639 (1977-05-01), Weiss
patent: 4186448 (1980-02-01), Brekke
patent: 4200939 (1980-05-01), Oser
patent: 4222128 (1980-09-01), Tomonaga
patent: 4329743 (1982-05-01), Alexander et al.
Kulkarni et al., J. Biomed. Mater. Res., vol. 5, pp. 169-181, (1971).
Getter et al., J. Oral Surgery, vol. 30, pp. 344-348, May 1972.

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