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US 5,348,026 AGranted
Osteoinductive bone screw
AssigneeSmith & Nephew Richards Inc.
InventorJames A. Davidson
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Abstract
A bone screw and its method of manufacturing provides a low modulus osteoinductive bone screw with a high resistance to insertion torquing. The method includes the steps of pre-torquing a plurality of reinforcing fibers, molding a polymer matrix to bond with the pre-torqued fibers, and wherein the screw apparatus is coated with an osteoinductive material such as BMP, growth factors, hydroxyapatite or calcium phosphate.
Claims22
A method of manufacturing a low modulus bone screw with a high resistance to insertion torque, comprising the steps of:
- a) pre-torquing a plurality of reinforcing fibers;
- b) molding a bone screw shaped polymer matrix that includes a shank portion with a helical thread thereon to bond with the pre-torqued fibers;
- c) wherein the fibers are wound in a direction that orients the fibers to resist insertion torque applied to the bone screw;
- and
- d) wherein in step b) a body is formed having a size and shape of a bone screw.
2 more elements
Dependencies are inferred from the claim text.