A dynamic fixation medical implant having two bone anchors includes a longitudinal connecting member assembly having a transition portion and cooperating outer sleeve, both the transition portion and sleeve being disposed between the two bone anchors. In a first embodiment, the transition portion includes a rigid length or rod having apertures therein for tying or otherwise attaching the rigid length to a second rigid length or to a flexible cord. Slender ties or cords extend through a plurality of apertures in the rigid lengths or are threaded, tied or plaited to the larger flexible cord or cable. In a second embodiment, a transition portion includes slender ties of a cord that are imbedded in a molded plastic of a more rigid member. The sleeve surrounds the transition portion and extends between the pair of bone anchors, the sleeve being compressible in a longitudinal direction between the bone anchors.

A method of securing a rod to a receiver via a closure top. The receiver is configured to be used with a bone anchor and includes a pair of upright arms that define an open channel configured to receive the rod, a discontinuous helically wound receiver guide and advancement structure formed into the interior surfaces of the upright arms, and horizontally-elongated tool-engaging structures formed on the outer surface of the upright arms. The method further includes positioning the rod within the open channel of the receiver and securing the rod to the receiver by threadably advancing the closure top to secure the rod and within the receiver body of the receiver. The method further includes rotatably attaching a lower end of a tool to the receiver.

An adjustable spinal stabilization system for maintaining preselected spacing and movement between adjacent vertebrae in a spinal column and for providing overall stability thereto. The system includes at least one interlaminar member positioned in the spaces intermediate a first vertebra and the vertebrae positioned immediately above or immediately below and adjacent to the first vertebra. The interlaminar member is operatively connected to an adjustable support structure and cooperates therewith to maintain the preselected spacing between adjacent vertebrae and to provide overall stability to the spinal column.

A vertebral stabilisation device, consisting of at least two linking elements arranged to link two separate vertebrae together, and attachment elements for attaching the ends of each linking element to the two separate vertebrae, characterised in that the length of the linking elements and the arrangement of the attachment elements are such that each linking element can extend diagonally between the two vertebrae to which it is attached, intersecting the mean sagittal plane of the vertebral column, the two linking elements intersecting substantially at said plane, and in that at least the attachment elements situated on a same side of the mean sagittal plane of the vertebral column and on separate vertebrae are not attached to each other.

A dynamic fixation medical implant having at least two bone anchors includes a longitudinal connecting member assembly having a core portion made from at least one pre-tensioned flexible member and a cooperating pre-compressed surrounding outer sleeve. The sleeve surrounds the core and is disposed between cooperating rigid end members that are attached to the bone anchors.

An adjustable spinal stabilization system for maintaining preselected spacing and movement between adjacent vertebrae in a spinal column and for providing overall stability thereto. The system includes at least one interlaminar member positioned in the spaces intermediate a first vertebra and the vertebrae positioned immediately above or immediately below and adjacent to the first vertebra. The interlaminar member is operatively connected to an adjustable support structure and cooperates therewith to maintain the preselected spacing between adjacent vertebrae and to provide overall stability to the spinal column.

An adjustable spinal stabilization system for maintaining preselected spacing and movement between adjacent vertebrae in a spinal column and for providing overall stability thereto. The system includes at least one interlaminar member positioned in the spaces intermediate a first vertebra and the vertebrae positioned immediately above or immediately below and adjacent to the first vertebra. The interlaminar member is operatively connected to an adjustable support structure and cooperates therewith to maintain the preselected spacing between adjacent vertebrae and to provide overall stability to the spinal column.

A pivotal bone anchor assembly for securing an elongate rod to a bone of a patient. The assembly includes a receiver having pair of upright arms that define an open channel configured to receive the elongate rod and a discontinuous helically wound receiver guide and advancement structure formed into the interior surfaces of the upright arms. The assembly further includes a closure configured for positioning within the open channel to secure the elongate rod to the receiver in a locked configuration, with the closure having an outer surface with a mating continuous helically wound closure guide and advancement structure configured to resist a tendency toward splaying between the upright arms upon a screwing in of the closure within the open channel by rotatable engagement with the receiver guide and advancement structure.

The present invention relates to a connection element for a spine stabilization system which comprises a first end for fixing to a first bone fixation device, a second end for fixing to a second bone fixation device and an intermediate portion arranged or formed between the two ends and defining a longitudinal axis. At least one of the two ends takes the form of a coupling element for fixing the connection element to a bone fixation device in at least one defined orientation relative to the longitudinal axis. The coupling element has a shape other than a circular cylinder.

A dynamic fixation medical implant having at least two bone anchors includes a longitudinal connecting member assembly having a core portion made from at least one pre-tensioned flexible member and a cooperating pre-compressed surrounding outer sleeve. The sleeve surrounds the core and is disposed between cooperating rigid end members that are attached to the bone anchors.