Articulating spinal fixation rod and system
AssigneeSDGI Holdings, Inc.
InventorsSamuel M. Shaolian, Thanh Van Nguyen, To V. Pham, George P. Teitelbaum
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Abstract
The present invention relates generally to systems and methods for aligning and implanting orthopedic fixation or stabilization implants within the body. In one embodiment, the system includes at least two bone anchors, at least one of which is provided with a transverse portal and a locking member. In one aspect, the system also includes at least one linkage rod, for linking two or more bone anchors through their respective locking members. The linking rod may include at least one angularly adjustable joint, which may be fixed by actuating the locking member. The bone anchors and the linkage rod may be locked into place to form a spinal fusion or fixation prosthesis.
Claims38
A prosthesis for minimally invasive posterior fixation, comprising:
- a bone anchor having a head;
- a transverse portal extending through opposing sidewalls of said head along an axis transverse to a central axis of said bone anchor, said opposing sidewalls being substantially closed above said transverse portal;
- a first segment of a rod extending through said transverse portal, said first segment defining a first surface;
- a second segment of a rod having a second complementary surface;
- a joint formed at least in part by said first surface and said second surface;
- and
- a locking cap which in response to lateral movement secures said first segment within said portal and fixes the angular relationship of the joint.
A prosthesis for minimally invasive posterior fixation, comprising:
- a bone anchor having a head;
- a transverse portal extending through said head along an axis transverse to a central axis of said bone anchor;
- a first segment of a rod extending through said transverse portal, said first segment defining a first surface;
- a second segment of a rod having a second complementary surface;
- a joint formed at least in part by said first surface and said second surface;
- and
- a locking cap which in response to lateral movement secures said first segment within said portal and fixes the angular relationship of the joint;
- wherein said first segment further comprises at least one compression gap.
A prosthesis for minimally invasive posterior fixation, comprising:
- a first bone anchor having a head and a transverse portal extending through said head along an axis transverse to a central axis of said first bone anchor;
- a second bone anchor having a head and a transverse portal extending through said head along an axis transverse to a central axis of said second bone anchor;
- a first segment of a rod extending through said transverse portal of said first bone anchor, said first segment defining a first surface, said first segment being configured such that it can be advanced entirely through said transverse portal of said second bone anchor;
- a second segment of a rod having a second complementary surface;
- a joint formed at least in part by said first surface and said second surface;
- and
- a locking cap that is configured for lateral movement within said head of said first bone anchor and is configured such that lateral movement within said head secures said first segment within said portal and fixes the angular relationship of the joint.
A prosthesis for minimally invasive posterior fixation, comprising:
- a bone anchor having a head;
- a transverse portal extending through said head along an axis transverse to a central axis of said bone anchor;
- a first segment of a rod extending through said transverse portal, said first segment defining a first surface;
- a second segment of a rod having a second complementary surface;
- a joint formed at least in part by said first surface and said second surface;
- means for securing said first segment within said portal and fixing the angular relationship of the joint;
- and
- a guidewire lumen extending through said first and second segments of the rod.
A prosthesis for minimally invasive posterior fixation, comprising:
- a first bone anchor having a head and a transverse portal extending through said head along an axis transverse to a central axis of said first bone anchor;
- a second bone anchor having a head and a transverse portal extending through said head along an axis transverse to a central axis of said second bone anchor;
- a first segment of a rod extending through said transverse portal of said first bone anchor, said first segment defining a first surface;
- a second segment of a rod having a second complementary surface;
- a joint formed at least in part by said first surface and said second surface, said joint configured to allow an angular orientation of said first and second segments to be adjusted within a cone having a vertex located between said first and second bone anchors;
- and
- a locking cap which in response to lateral movement secures said first segment within said transverse portal of said first bone anchor and fixes the angular relationship of the joint.
Dependencies are inferred from the claim text.