38 results about "Posterior stabilization" patented technology

A stabilization system for a human spine is provided comprising at least two dynamic interbody device and at least one dynamic posterior stabilization system. In some embodiments the stabilization system comprises a pair of dynamic interbody devices and a pair of dynamic posterior stabilization systems. The dynamic interbody devices may work in conjunction with the dynamic posterior stabilization systems to allow for movement of vertebrae coupled to the stabilization system. The dynamic posterior stabilization systems may provide resistance to movement that mimics the resistance provided by a normal functional spinal unit. In some embodiments, a bridge may couple a dynamic interbody device to a dynamic posterior stabilization system.

A dynamic posterior stabilization system is provided to stabilize a human spine. In some embodiments, the dynamic posterior stabilization system includes a first bone fastener, a second bone fastener, and an elongated member coupled to the first bone fastener and the second bone fastener. The longitudinal position of the elongated member relative to the first bone fastener may be fixed. The longitudinal position of the second bone fastener relative to the elongated member may vary so that the dynamic posterior stabilization system can accommodate flexion / extension and / or lateral bending. The dynamic posterior stabilization system may also be able to accommodate axial rotation. Bias members may be coupled to the elongated member. The bias members may allow the dynamic posterior stabilization system to mimic the resistance behavior of a normal functional spinal unit.

Insertion methods for placing dynamic interbody devices between a first vertebra and a second vertebra using a posterior approach are provided. In an embodiment, the insertion method may be based on the first vertebra. A bridge assembly may be attached to tap shafts positioned in the first vertebra. The bridge assembly may establish an insertion angle of implants into a disc space between the vertebrae. In an embodiment, the insertion method may be based on the position of expandable trials positioned between the vertebrae. The trials may be positioned and a bridge assembly may be coupled to the expandable trials and taps positioned in the first vertebra. One or more posterior stabilization systems may be coupled to the vertebrae after insertion of the dynamic interbody devices between the vertebrae.

Various methods and devices for replacing damaged, injured, diseased, or otherwise unhealthy posterior elements, are provided. In one exemplary embodiment, a posterior implant is provided and can be adapted to control movement of two or more adjacent vertebrae. In particular, the implant can be adapted to control extension, flexion, and lateral bending of adjacent vertebrae. The implant can also be adapted to substantially prevent rotation of the adjacent vertebrae. In another exemplary embodiment, the implant can have an envelope of motion that is within an envelope of motion of a disc, either natural or artificial, that is disposed between adjacent vertebrae. In other words, the implant can be configured to allow flexion, extension, lateral bending of the vertebrae to within the amount of flexion, extension, and lateral bending allowed by the particular disc. The implant can also be adapted to substantially prevent rotation of the vertebrae relative to one another.

Dynamic posterior stabilization systems and methods of stabilizing vertebrae are described. A dynamic posterior stabilization system may include a first bone fastener configured to couple to a first vertebra, a second bone fastener configured to couple to a second vertebra, and a dampener system attached to the first bone fastener and the second bone fastener. The dampener system may include a single dampener set. Compression of the single dampener set provides resistance to movement of the first bone fastener towards the second bone fastener. Compression of the first dampener set and the second dampener set provides resistance to movement of the first bone fastener away from the second bone fastener.

A posterior spinal prosthesis is configured to cover exposed portions of a spinal column especially, but not necessarily, as a result of a medical spinal procedure and particularly, to provide posterior coverage of an exposed spinal cord, soft tissue, Foramen and / or adipose tissue, associated with one or more vertebrae as a result of the removal the spinous processes and / or the spinous process and laminar hoods from the one or more vertebrae of the spine as a result of a spinal decompression procedure or other reason. A plate forming the prosthesis is connectable to spine rod constructs implanted on lateral sides of the vertebrae and projects in the posterior direction relative to the connection. The plate is generally curved in the superior / inferior direction to provide either a lordotic or kyphotic curvature depending on the portion of the spine to which the prosthesis is utilized. As such, the posterior spinal prosthesis may be used on any portion of the spine such as the cervical vertebrae, the thoracic vertebrae and / or the lumbar vertebrae. The present posterior spinal prosthesis also provides posterior stabilization of the associated vertebrae as well as aiding in preventing post operative soft tissue cavitation at the decompression site.

Dynamic posterior stabilization systems and methods of stabilizing vertebrae are described. A dynamic posterior stabilization system may include bone fasteners and a dampener system. The bone fasteners may be secured to the vertebrae, and the dampener system may be attached to the bone fasteners. The dampener system may include a first dampener set and a second dampener set positioned on an elongated member. The first dampener set may be compressed and provides resistance to movement of the first bone fastener towards the second bone fastener. The second dampener set may be compressed and provide resistance to movement of the first bone fastener away from the second bone fastener.