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US 9,433,440 B2Granted
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.
Claims11
A polyaxial screw assembly, comprising:
- a bone screw member;
- at least one rod member;
- and
- a body member for interconnecting the bone screw member to the at least one rod member, the body member including:
- a rod retainer operable to retain the at least one rod member therein while allowing sliding movement of the body member relative to the rod member, the rod retainer comprising:
- at least one port;
- and
- a sleeve member rotatable relative to the at least one port along an axis defined by a length of the at least one port while disposed therein, the sleeve member rotatable between a first unlocked position and a second locked position, the sleeve member having:
- a first condition, while the sleeve is in the first unlocked position and not in the second locked position, allowing rotation and sliding of the rod member thereof relative to the at least one port while retaining a portion of the rod member therein;
- and
- a second condition, while the sleeve is in the second locked position, locking the sleeve and the rod member from rotation relative to the at least one port while allowing the rod member to slide within the sleeve, the at least one port engageable with the sleeve member to effect the second condition.
8 more elements
A polyaxial screw assembly, comprising:
- a bone screw member;
- at least one rod member having at least one non-linear shape;
- and
- a body member for interconnecting the bone screw member to the at least one rod member, the body member including:
- a rod retainer operable to retain the at least one rod member therein while allowing sliding movement of the body member relative to the rod member, the rod retainer comprising:
- at least one port;
- and
- a sleeve member:
- having an interior bore curved to correspond to the at least one shape;
- rotatable relative to the at least one port along an axis defined by a length of the at least one port while disposed therein;
- rotatable between a first unlocked position and a second locked position;
- and
- having:
- a first condition, while the sleeve is in the first unlocked position and not in the second locked position, allowing rotation and sliding of the rod member thereof relative to the at least one port while retaining a portion of the rod member therein;
- and
- a second condition, while the sleeve is in the second locked position, locking the sleeve and the rod member from rotation relative to the at least one port while allowing the rod member to slide within the sleeve, the at least one port engageable with the sleeve member to effect the second condition.
13 more elements
Dependencies are inferred from the claim text.