Orthopedic stabilization devices and methods for installation thereof
Inventors
Assignees
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Publication Number
US-12465406-B2
Publication Date
2025-11-11
Expiration Date
Abstract
A spinal stabilization device having an anchor and a bone fixation members, such as bone screws, for use in orthopedic stabilization assemblies.
Core Innovation
The disclosed invention relates to spinal stabilization devices that couple an inserted spinal stabilization anchor to a pedicle screw using a coupling feature at the distal tip of the threaded shaft. The anchor includes a head and a shank extending from the head and is configured to be inserted into a pre-drilled hole in a vertebral body. The pedicle screw includes a head and a threaded shaft for insertion into the pre-drilled hole, where the threaded shaft includes a distal tip coupling feature to be coupled to the head of the inserted anchor.
The anchor head includes a compressible head configured to engage the coupling feature of the threaded shaft. In one refinement, the anchor head includes a lower-side recess and the threaded shaft coupling feature includes a recess to receive the anchor head and a lip that engages the anchor head recess for coupling. The coupling configuration is described such that pushing the threaded shaft onto the anchor head compresses the anchor head at the lip and then expands it inside the coupling feature recess.
The invention further includes installation and anti-loosening structures for the anchor within the vertebral body. The anchor shank is described as having longitudinally spaced, proximally angled teeth to prevent the anchor from backing out. The anchor head includes a central socket configured to receive a driver tool for hammering the anchor into the vertebral body, and the anchor includes an alignment feature that mates with a complementary alignment feature on a deployment cannula for insertion.
Claims Coverage
The document contains two independent claims. Across these claims, the coverage centers on an anchor with a compressible head that couples to a pedicle screw distal tip coupling feature, together with specific coupling geometry, anti-backout and installation features, and an additional deployment sleeve for delivering and hammering the anchor into cancellous regions.
Compressive-headed anchor coupling to pedicle screw
A spinal stabilization device comprising an anchor having a head and a shank extending from the head and configured to be inserted into a pre-drilled hole in a vertebral body, and a pedicle screw having a head and a threaded shaft for insertion into the pre-drilled hole, where the threaded shaft has a coupling feature at its distal tip to be coupled to the head of the inserted anchor and wherein the anchor head includes a compressible head for engaging with the coupling feature of the threaded shaft.
Deployment sleeve delivery to cancellous region with compressible-headed anchor
A spinal stabilization device comprising a deployment sleeve configured to be inserted into a pre-drilled hole in a vertebral body, an anchor having a compressible head and a shank extending from the head configured to be inserted into the pre-drilled hole through the deployment sleeve to be hammered into a cancellous regions of the vertebral body, and a pedicle screw having a head and a threaded shaft for insertion into the pre-drilled hole, the threaded shaft having a coupling feature at its distal tip to be coupled to the compressible head of the anchor that has been inserted into the cancellous region of the vertebral body.
Overall, the independent claims cover spinal stabilization systems where a compressible-headed anchor inserted in a vertebral body is coupled to a pedicle screw by a distal tip coupling feature, with an additional independent claim aspect that uses a deployment sleeve to deliver and hammer the anchor into cancellous regions.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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