A spinal jack adapted for installation between first and second vertebral processes, including a central body supporting first and second inter-expandable jack halves between retracted and expanded positions. Each of the jack halves further includes gripping portions adapted for engaging the vertebral processes. A geared mechanism provides for expanding or retracting the jack halves in order to establish a corrected adjusted orientation between the processes.

Intervertebral implants, assemblies, and methods thereof. An intervertebral implant includes opposing chamfered edges to reduce a diagonal distance between the edges. The reduced diagonal distance minimizes distraction of an intervertebral disc space during insertion of the implant. A tool for insertion and rotation of the implant is also provided.

An intervertebral fusion cage that is adapted to contain an inserter within its inner volume during insertion of the cage.

A system for spinal surgery includes a prosthesis comprising a plurality of bone anchors which engage an intervertebral construct for fusion or motion preservation. The fusion construct comprises a spacer optionally encircled by a jacket. The motion preservation construct may comprise an articulating disc assembly or an elastomeric disc assembly. Any of the constructs may occupy the intervertebral disc space between adjacent vertebrae after removal of an intervertebral disc. The anchors slidingly engage the construct to securely fix the prosthesis to the vertebrae. The anchors and jacket of the fusion construct provide a continuous load path across opposite sides of the prosthesis so as to resist antagonistic motions of the spine.

Implantable devices that comprise an improved bone graft material, such as for example, bioactive glass, are disclosed. Additionally, implantable devices that work in conjunction with an improved bone graft material and act as a composite implantable device, for the improved treatment of bone, are also disclosed. These devices are bioactive, and are engineered to provide enhanced cellular activity to promote bone fusion or regrowth.

A method for closing a fissure in a region of tissue having an inner surface and an outer surface, the method comprising: providing at least a pair of transverse anchor components, each transverse anchor component being coupled to at least one flexible longitudinal fixation component having a longitudinal axis; placing the transverse anchor components relative to the inner surface of the tissue on both sides of the fissure such that an exposed end of a flexible longitudinal fixation component extends through the tissue and past the outer surface of the tissue on both sides of the fissure; applying axial tension to the exposed ends; and anchoring the exposed ends.

A four-component artificial intervertebral disc may provide six degrees of movement: flexion, extension, lateral bending, axial rotation, axial deflection, and anterior/posterior translation. The disc may include a superior endplate, a superior core, an inferior core, and an inferior endplate. The superior endplate may include a concave mating surface, and the inferior endplate may include a spherical mating surface. The superior endplate may roll across the superior core to provide flexion, extension, and lateral bending. The superior endplate may twist or rotate atop the superior core to provide axial rotation, and the superior endplate may slide over the superior core to provide anterior/posterior translation. The superior core may be connected to the inferior core, and the inferior core may be connected to the inferior endplate. The inferior core may be made from a flexible material that may enable the artificial disc to expand or compress vertically.

Apparatus and methods for providing spinal percutaneous delivery of an implant that can rigidly fixate the spinous process of a first superior bone and a second inferior bone of a functional spinal unit. In one aspect, the device comprises two bone abutment members connected via an interconnecting member. In another aspect, the method comprises implanting at least two spinal implant apparatus within a target disc space via an implantation apparatus. In another aspect, a placement instrument comprising an implant delivery segment, an anchor segment, and an articulating arm is disclosed.

A spinal implant for stabilizing two adjacent vertebrae having a damaged disc therebetween is assembled in situ. The implant consists of a bone tray, an anchor, a retainer plate, a retainer, and mounting screws. The bone tray bone tray is elliptical shaped and includes an open top side and an open bottom side, the top side and the bottom side adapted to engage the end plates of adjacent vertebrae, respectively, the bone tray having a sidewall connecting the top side and the bottom side, the sidewall having an bore therethrough. The retainer is slidably extending through the bore whereby the distractor anchor is adapted to be inserted between adjacent vertebrae and the retainer extends through the retainer plate. The retainer plate is secured to the vertebrae body by mounting screws. A driver, not shown, is adapted to rotate the retainer which engages the distractor anchor to engage the bone tray.

An implantable medical device for implantation in a hip joint of a human patient is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.