BONE FRACTURE FIXATION SYSTEM
First Claim
1. A bone fracture fixation system comprising:
- a metallic bone plate having a first composition comprising titanium or a titanium alloy and an opening for receiving a fastener,a metallic fastener having a second composition comprising titanium, a titanium alloy, or a stainless steel, and sized to be received in the opening, anda cold-sprayed metallic coating either within the opening or on the metallic fastener and comprising a biocompatible metallic material having a third composition that is different than the first and second compositions such that when the metallic fastener is inserted into the opening of the metallic bone plate to stabilize a bone fracture, the cold-sprayed metallic coating substantially prevents bonding and corrosion between the metallic fastener and the metallic bone plate.
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Abstract
A bone fracture fixation system comprising a metallic bone plate having a first composition comprising titanium or a titanium alloy and an opening for receiving a metallic fastener that has a second composition comprising titanium, a titanium alloy, or a stainless steel, and is sized to be received in the opening, and a cold-sprayed metallic coating either within the opening or on the metallic fastener is provided. The cold-sprayed metallic coating comprises a biocompatible metallic material having a third composition different than the first and second compositions. When the metallic fastener is inserted into the opening to stabilize a bone fracture, the cold-sprayed metallic coating may substantially prevent bonding or one or more types of corrosion between the metallic fastener and the metallic bone plate. In another embodiment, the cold-sprayed metallic coating comprises at least one of a cobalt-chrome alloy, gold, a gold alloy, silver or a silver alloy.
106 Citations
25 Claims
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1. A bone fracture fixation system comprising:
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a metallic bone plate having a first composition comprising titanium or a titanium alloy and an opening for receiving a fastener, a metallic fastener having a second composition comprising titanium, a titanium alloy, or a stainless steel, and sized to be received in the opening, and a cold-sprayed metallic coating either within the opening or on the metallic fastener and comprising a biocompatible metallic material having a third composition that is different than the first and second compositions such that when the metallic fastener is inserted into the opening of the metallic bone plate to stabilize a bone fracture, the cold-sprayed metallic coating substantially prevents bonding and corrosion between the metallic fastener and the metallic bone plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A bone fracture fixation system comprising:
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a metallic bone plate comprising titanium or a titanium alloy and having an opening for receiving a fastener; a metallic fastener comprising titanium or a titanium alloy, wherein the metallic fastener has a head sized to be positioned in the opening and a shaft for inserting through the opening into bone; and a cold-sprayed metallic coating comprising at least one of a cobalt-chrome alloy, gold, a gold alloy, silver or a silver alloy, wherein the cold-sprayed metallic coating resides on the head of the metallic fastener such that when the metallic fastener is inserted into the opening in engagement with the metallic bone plate to stabilize a bone fracture, the cold-sprayed metallic coating substantially prevents bonding of the titanium or titanium alloy of the metallic fastener to the titanium or titanium alloy of the metallic bone plate. - View Dependent Claims (12, 13)
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14. A bone fracture fixation system comprising:
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a metallic bone plate comprising titanium or a titanium alloy and having an opening for receiving a fastener; a metallic fastener comprising a stainless steel, wherein the metallic fastener has a head sized to be positioned in the opening and a shaft for inserting through the opening into bone; and a cold-sprayed metallic coating comprising a metal or alloy having an electrical resistance greater than the stainless steel of the metallic fastener, wherein the cold-sprayed metallic coating resides on the head of the metallic fastener such that when the metallic fastener is inserted into the opening in engagement with the metallic bone plate to stabilize a bone fracture, the cold-sprayed metallic coating provides a barrier to electrical contact between the metallic fastener and the metallic bone plate to thereby substantially prevent galvanic corrosion of the metallic fastener. - View Dependent Claims (15, 16, 18)
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17. A method for immobilizing a fractured bone comprising:
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placing a metallic bone plate having an opening for receiving a fastener proximate to the bone, the metallic bone plate having a first composition comprising titanium or a titanium alloy; and inserting a metallic fastener through the opening and into the bone to secure the metallic bone plate to the bone, the metallic fastener having a second composition comprising titanium, a titanium alloy or stainless steel, and wherein a cold-sprayed coating comprising a third composition different than the first and second compositions resides either within the opening or on the metallic fastener and is forcibly engaged between the metallic fastener and the metallic bone plate. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification