Abstract: A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, a spacer within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the spacer, which in turn engages the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.

Abstract: Instrumentation and methods for reduction of a spinal deformity, including a plurality of elongate alignment elements and first and second reduction elements engaged to the alignment elements. Each of the alignment elements extends generally along a longitudinal axis and includes a proximal portion adapted for coupling to a corresponding vertebra and a distal portion. The first reduction element extends along a first transverse axis and is engaged with the distal portions of the alignment elements to maintain the distal portions in general alignment along the first transverse axis. The second reduction element extends along a second transverse axis and is movably engaged with the alignment elements wherein the proximal portions are positioned in general alignment along the second transverse axis as the second reduction element is displaced in a proximal direction to thereby reduce the spinal deformity.

Abstract: A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, a spacer within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the spacer, which in turn engages the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.

Abstract: Instrumentation and methods for reduction of a spinal deformity, including a plurality of elongate alignment elements and first and second reduction elements engaged to the alignment elements. Each of the alignment elements extends generally along a longitudinal axis and includes a proximal portion adapted for coupling to a corresponding vertebra and a distal portion. The first reduction element extends along a first transverse axis and is engaged with the distal portions of the alignment elements to maintain the distal portions in general alignment along the first transverse axis. The second reduction element extends along a second transverse axis and is movably engaged with the alignment elements wherein the proximal portions are positioned in general alignment along the second transverse axis as the second reduction element is displaced in a proximal direction to thereby reduce the spinal deformity.