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US 5,639,402 AGranted
Method for fabricating artificial bone implant green parts
OwnerJoel W. Barlow, Goonhee Lee +4inventors
InventorsJoel W. Barlow, Goonhee Lee, Richard H. Crawford, Joseph J. Beaman, Harris L. Marcus, Richard J. Lagow
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Abstract
Bone implants are made from calcium phosphate powders by selectively fusing layers of calcium powders that have been coated or mixed with polymer binders. The calcium powder mixture may be formed into layers and the polymer fused with a laser. Complex three-dimensional geometrical shapes can be automatically replicated or modified using this approach.
Claims25
A method for making an implant green part, comprising the steps of:
- (a) forming a mixture of a calcium phosphate composition and a polymer binder, wherein the calcium phosphate composition is calcium metaphosphate, calcium pyrophosphate, or mixtures thereof;
- and
- (b) selectively fusing the polymer binder with a laser beam to form the implant green part.
A method for making an implant green part, comprising the steps of:
- (a) forming a mixture of a calcium phosphate composition and a polymer binder, wherein the calcium phosphate composition is calcium metaphosphate, calcium pyrophosphate, or mixtures thereof;
- (b) forming a layer of the mixture;
- (c) selectively fusing the polymer binder with a laser beam;
- and
- (d) repeating steps (b) and (c) a desired number of times to form a plurality of layers, wherein each layer is fused to adjacent layers to form the implant green part.
2 more elements
Dependencies are inferred from the claim text.