Polyaxial screw assembly
OwnerMarc E. Richelsophinventor
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 by dampening with a body member interconnecting the screw to the rod.
Claims107
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.
A polyaxial screw assembly comprising screw rotation control means for controlling the force required to rotate a screw along an axis perpendicular to an axis defined by a length of a body member retaining said screw.
A polyaxial screw assembly comprising a body member including an inner surface;
- seat means for seating a head of a screw therein and including an outer surface seated within said inner surface of said body member and locking means for locking said screw head within said body member;
- and a gap between said inner and outer surfaces allowing motion of the screw relative to said body member when said screw is locked within 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.
An orthopedic device comprising:
- a body member for interconnecting at least one rod and a screw, said body portion including at least one bearing holder for returning a rod gripping bearing therein;
- and
- rod bearing rotator body means having a first unloaded condition allowing rotation of the bearing relative to said holder and a loaded condition for preventing relative rotation between said holder and the bearing.
An orthopedic device comprising:
- a bearing member including a substantially tubular body portion having an inner surface for retaining a portion of a rod therein and an outer surface including engagement means for engaging an inner surface of a bearing holder which interconnects a rod to a screw and prevents relative rotation therebetween.
A polyaxial screw assembly comprising:
- rod stop means for being fixedly mounted on a rod and engaging otherwise slidable body members, which interconnects a screw to a rod, to prevent further sliding movement of the body member along the rod beyond the rod stop means.
An orthopedic device including a biasable screw head seat.
An orthopedic device comprising screw self centering means for self centering a screw relative to a body member retaining the screw when the body member is unengaged from a rod member.
A method of interconnecting an orthopedic screw with a rod by load dampening with a body member interconnecting the screw to the rod.
A method of interconnecting an orthopedic screw to a rod by screwing a screw into a bias able screw head seat.
A method of stabilizing a spine for non-fusion by interconnecting screws with rods and allowing relative movement between the screws and rods.
A method of stabilizing a spine by encapsulating a locking mechanism of a screw within a body member and suspending all surfaces of locking mechanism of the screw from an internal recess of the body member.
A method of straightening a curve of a spine of a patient by:
- sharing loads between interconnected vertebrae;
- correcting curvature between the interconnected vertebrae while not requiring fusion of vertebrae;
- and
- growing the interconnection of the vertebrae coincidental with the patient's growth.
A method of preventing spinal compression by interconnecting at least two vertebrae with body members directly connected to the vertebrae and interconnected by at least one rod member;
- selectively allowing sliding movement of the body members on the rod;
- and
- limiting the proximity of the body members to each other along the rod.
An orthopedic device comprising a rod member including at least two flat surfaces opposing each other.
An orthopedic device comprising:
- a body member including load sharing means for sharing loads placed on a spine to which said device is attached and a screw member for interconnecting said body member to the spine, said screw member including a non-round head portion seated within said load sharing means and in sliding engagement therewith.
An implant assembly comprising:
- a body portion;
- spinal connection means for connecting said body portion to a spine;
- and rod connecting means for connecting said body portion to a rod, said rod connecting means including rotatable locking positions to allow locking of a rod curve at angles relative to a spinal curve without additional instruments.
An implant assembly comprising:
- a first rod including an inner wall defining a passageway therein;
- a second rod disposed within said passageway for telescoping movement relative to said first rod;
- retaining means for retaining said second rod in at least one telescoped interconnection position relative to said first rod;
- and
- range of motion means for allowing for and limiting a range of relative motion between said first and second rods while maintaining a consistent total interconnected length of said first and second rods.
An implant assembly comprising a plurality of rods interconnected at rod joints, at least some of said rod joints including range of motion means for allowing for and limiting a range of motion between two interconnected rods.
An implant assembly comprising a plurality of rods interconnected at rod joints, at least some of said rods being selectively rotatable relative to an adjacent rod along a longitudinal axis of said plurality of rods.
Dependencies are inferred from the claim text.