摘要:
A spine stabilization system includes a flexible member attachable to a portion of the spinal column. The use of components resist loading applied by extension and rotation of the spine, while the flexibility of the member does not subject it to the compressive loading of the spinal column segment to which it is attached.
摘要:
A surgical instrument for assembling a spinal prosthesis to a plurality of anchoring members may be used to guide a driving tool and, if desired, to apply a distraction or compression force. The instrument includes two guide tubes with respective proximal, distal, and intermediate sections. The guide tubes are pivotally connected at their intermediate sections so that their respective longitudinal axes intersect and the cannulations of the guide tubes intersect. The surgical instrument may include a locking mechanism connecting the proximal portions and selectively operative to preserve an angular relationship between the guide tubes against at least one of increasing or decreasing.
摘要:
An intervertebral implant adapter for the L5-S1 juncture comprises a wedge shaped body of biocompatible material having upper and lower surfaces with the upper surface having a slot which provides slidable interlocking engagement with a motion or fusion implant. The lower surface is provided with any convenient bone anchoring mechanism. The adapter mates with an upper implant which is implanted after the adapter so as to provide an implant which matches the lordotic angle but which, in its multiple piece form, is no bigger than the posterior disk height.
摘要:
A series of instruments (30, 80, 120, 210, 510, 550) are provided for direct-anterior and oblique-anterior disc space and end plate preparation. The instruments (30, 80, 120, 210, 510, 550) provide precise guidance for channel formation in the vertebral endplates by guiding rotating and bladed cutting instruments (122, 250, 580). Instrumentation (550) for oblique-anterior disc space preparation includes compound angulation to account for the angle of approach to the spine and the angulation between adjacent vertebrae. Methods and techniques for use of the instruments (30, 80, 120, 210, 510, 550) are also described.
摘要:
A vertebral replacement device for supporting adjacent vertebrae includes a vertebral body member having at least one of an upper or lower disc replacement member engaged thereto at one end thereof. The disc replacement device can be positioned in a spinal disc space when disengaged from the vertebral body member.
摘要:
A plating system for stabilization of a bony segment includes a plate engageable to at least first and second bony elements. For spinal stabilization, the plate is attached at least to first and second vertebrae with at least one bone fastener in each vertebra. Retaining members are attachable to the plate to prevent the bone fasteners from backing out of the plate. One retaining member is a variable retaining member that allows the bone fasteners to toggle in the plate without interference. A second retaining member is a fixed retaining member that fixes the bone fasteners relative to the plate.
摘要:
Instrument and implants are disclosed which provide for insertion of an implant into an intervertebral disc space from multiple approaches to the spine. Specifically, as a preferred aspect of the invention the implant includes a tapered portion and the implant may be inserted from multiple approaches to the spine with the orientation and taper properly oriented in the disc space regardless of the approach.
摘要:
Systems and methods for stabilizing the spine are provided. For stabilizing the L5-S1 junction, the system includes a plate (7) that has a generally triangular shape with an upper node (8a) and a pair of lower nodes (9a, 10a). The upper node (8a) has a hole (8) through the plate (7) to receive a screw (11) for passage into the L5 vertebra. The lower nodes (9a, 10a) each include a hole (9,10) through the plate (7) to receive screws (12, 13) for passage into the S1 vertebra. The system further includes a plate (7) having a retaining element (32) for preventing backout of screws inserted through the plate (9). Instruments and methods for attaching the plate to the spinal column are also provided.
摘要:
A screw placement guide includes a first member having a first guide adapted to contact a first vertebral bone portion and a second member having a second guide adapted to contact a second vertebral bone portion. A clamping mechanism provided on one of the members clamps the first guide and the second guide to the vertebral bone portions. The first guide and the second guide are aligned in order to indicate how a fastener will be aligned when fastened between adjacent vertebrae. A driver engages clamping mechanism to clamp the two members together.
摘要:
A spine stabilization system includes a flexible member attachable to a portion of the spinal column. The member includes components that are oriented and function similar to the natural fiber orientation of the anterior longitudinal ligament and annulus tissue. The use of components resist loading applied by extension and rotation of the spine, while the flexibility of the member does not subject it to the compressive loading of the spinal column segment to which it is attached.