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US 7,942,905 B2Granted
Vertebral stabilizer
AssigneeWarsaw Orthopedic, Inc.
InventorsRoy Lim, Michael C. Sherman
Life of this patent
Estimating the term…
Abstract
A system for flexibly stabilizing a vertebral motion segment by connecting a first vertebra and a second vertebra is disclosed. The system includes a bumper with a resilient central member. The system is designed such that the resilient central member is compressed in both compression and extension of the bumper or vertebral motion segment. The system includes first and second means for connecting the bumper to the vertebrae.
Claims27
A system for flexibly stabilizing a first vertebra with respect to a second vertebra, the system comprising:
- a dynamic device comprising a first attachment portion, a second attachment portion, and a resilient member positioned between the first attachment portion and the second attachment portion, wherein the first and second attachment portions compress the resilient member when the first and second attachment portions move towards each other and compress the resilient member when the first and second attachment portions extend away from each other, wherein the first attachment portion includes a first flange adapted to transfer a first force to a first surface of the resilient member and wherein the second attachment portion includes a second flange adapted to transfer a second force to a second surface of the resilient member;
- a first fixation member for connecting the first attachment portion to the first vertebra;
- a second fixation member for connecting the second attachment portion to the second vertebra;
- and
- a first rod member connected to the first attachment portion, the first rod member having a third flange adapted to transfer a first tensile force to the second surface of the resilient member.
2 more elements
A dynamic device for use in a system for flexibly stabilizing a first vertebra with respect to a second vertebra, comprising:
- a first attachment portion having a first flange and a second flange;
- a first outer rod member connected to the first attachment portion, the first outer rod member having a third flange;
- a second outer rod member connected to the first attachment portion, the second outer rod member having a fourth flange;
- an inner rod member positioned between and slidably coupled with the first and second outer rod members, the inner rod member having a fifth flange;
- a second attachment portion connected to the inner rod member, the second attachment portion having a sixth flange;
- a resilient central member located at least partially between the first and second attachment portions, the resilient central member having an opening extending from a first side to a second side, the opening adapted to receive the first and second outer rod members and the inner rod member such that the first, second, and fifth flanges are positioned adjacent to the first side and the third, fourth, and sixth flanges are positioned adjacent to the second side.
3 more elements
A system for dynamically stabilizing a first vertebra with respect to a second vertebra, the system comprising:
- a first attachment portion for mating with a first bone fixation member;
- a first engagement portion extending from the first attachment portion, the first engagement portion comprising a first flange member and a second flange member spaced from the first flange member;
- a first rod member fixedly connected to the first engagement portion, the first rod member comprising a third flange member;
- a second attachment portion for mating with a second bone fixation member;
- a second engagement portion extending from the second attachment portion, the second engagement portion comprising a fourth flange member;
- a second rod member fixedly connected to the second engagement portion, the second rod member comprising a fifth flange member;
- a resilient member positioned between the first and second attachment portions and surrounding the first and second rod members, the resilient member having a first surface and an opposing second surface;
- the first bone fixation member for securing the first attachment portion to the first vertebra;
- and
- the second bone fixation member for securing the second attachment portion to the second vertebra;
- wherein the system is movable between a neutral position, a compression position, and an extension position, wherein the first, second, and fourth flange members compress the resilient member in the compression position and wherein the third and fifth flange members compress the resilient member in the extension position;
- and
- wherein the first and second attachment portions, the first and second engagement portions, the first and second rod members, and the resilient member are formed of a biomaterial suitable for in vivo implantation.
10 more elements
Dependencies are inferred from the claim text.