Polyaxial screw assembly
AssigneeIntelligent Implant Systems, LLC
InventorMarc E. Richelsoph
Life of this patent
Estimating the term…
Abstract
A polyaxial screw assembly includes an internal load dampening mechanism for sharing and dampening loads between at least one screw member and at least one rod member interconnected by the assembly. A method of interconnecting the orthopedic screw with the rod includes dampening with a body member interconnecting the screw to the rod.
Claims20
A polyaxial screw assembly comprising internal load dampening means for sharing and dampening loads between at least one screw member and at least one rod member interconnected by said assembly;
- and
- a body member containing said load dampening means and slidable rod retaining means for retaining a rod member therein while allowing sliding movement of said body member relative to said rod.
The assembly as set forth in claim. 1, wherein said assembly includes screw seat means for seating a screw head therein, said load dampening means including at least a portion of said screw head seat.
A polyaxial screw assembly comprising internal load dampening means for sharing and dampening loads between at least one screw member and at least one rod member interconnected by said assembly.
The assembly as set forth in claim 14, wherein said screw head seat means includes ring retainer means for retaining said ring therein, said ring defining at least one wall of said screw head seat means and providing a biasing surface whereby said ring biases to absorb forces between said screw head and said body member.
A polyaxial screw assembly comprising:
- a body member for interconnecting a screw member to at least one rod member, said body member including slidable rod retaining means for retaining a rod member therein while allowing sliding movement of said body member relative to said rod.
Dependencies are inferred from the claim text.