Modular in-line deflection rod and bone anchor system and method for dynamic stabilization of the spine

A bone stabilization component comprising:

• a deflectable post mounted in a shield;
• the deflectable post having a mount at a proximal end;
• the mount extending beyond the shield;
• the deflectable post being configured to allow compliant deflection of the mount relative to the shield;
• and
• a connector attached to the shield and adapted to secure the shield to a bone anchor so that the deflectable post is substantially in-line with the bone anchor and the mount is exposed and adapted for connection of a bone-stabilizing rod;
• and wherein:
• the deflectable post comprises a flexible shaft located within a bore of the shield;
• the bore of the shield and the shaft are substantially coaxial with the shield;
• and
• a compliant sleeve is positioned within the bore of the shield between the flexible shaft and the shield.

A spine implant comprising:

• a bone anchor in combination with a bone stabilization component;
• the bone stabilization component comprising,
• a deflectable post mounted in a shield,
• a compliant sleeve positioned between the deflectable post and the shield,
• the deflectable post having a mount at a proximal end thereof,
• the mount extending beyond the shield, and
• the bone stabilization component being configured to allow deflection of the
• mount relative to the shield;
• and
• the bone anchor being secured to the shield by a connector so that the deflectable post is substantially in-line with the bone anchor and the mount is exposed for connection of a bone-stabilizing rod.

A spine implant comprising:

• a deflectable post positioned in a bore defined by a tubular shield;
• a compliant member located between the post and the tubular shield;
• the deflectable post having a mount which extends beyond the tubular shield;
• the deflectable post spaced from the tubular shield such that the mount can deflect relative to the shield by deflection of the deflectable post and wherein the shield limits said deflection of the deflectable post;
• and
• wherein the tubular shield is mounted to a bone screw so that the deflectable post is one of parallel and coaxial with the bone screw, and the mount is exposed and adapted for connection of a spinal device.

A bone stabilization component comprising:

• a deflectable post mounted in a bore of a shield with a compliant member located between the post and the shield;
• the deflectable post having a mount at a proximal end;
• the mount extending beyond the shield;
• the deflectable post being configured to allow compliant deflection of the mount relative to the shield with said compliant deflection limited by the shield;
• and
• a bone anchor connected to the shield such that deflectable post is substantially in-line with a longitudinal axis of the bone anchor, and the mount is exposed and adapted for connection of a spinal device.

A bone anchor in combination with a bone stabilization component wherein:

• the bone stabilization component comprises a deflectable post mounted in a bore of a shield such that the deflectable post can be deflected towards the shield with the shield limiting the motion of the deflectable post and a compliant member located between the deflectable post and the shield;
• the deflectable post having a mount at a proximal end thereof;
• the mount extending beyond the shield;
• the bone stabilization component allowing deflection of the mount relative to the shield;
• and
• the shield associated with the bone anchor so that the deflectable post is in-line with the bone anchor, and the mount is exposed for and adapted to be connected with a spinal device.

A spine implant comprising:

• a tubular shield including a bore having a central axis;
• a deflectable post positioned in the bore;
• the deflectable post having a mount extending beyond the tubular shield adapted for connection of a spinal device;
• the deflectable post spaced from the tubular shield such that the mount can deflect relative to the tubular shield with the tubular shield limiting motion of the deflectable post;
• a bone screw mounted to the tubular shield aligned one of coaxial and parallel with the center axis of the bore of the tubular shield;
• and
• a compliant member coupled to the deflectable post wherein the compliant member can resiliently position the deflectable post in alignment with the center axis of the bore of the tubular shield.

A bone implant comprising:

• a deflectable post mounted in a bore of a shield;
• the deflectable post having a mount extending beyond the shield adapted for connection of a spinal device;
• the deflectable post being configured to allow compliant deflection of the mount relative to the shield with said compliant deflection limited by the shield;
• a bone anchor having a longitudinal axis;
• the shield mounted to the bone anchor such that the deflectable post is substantially in-line with the longitudinal axis of the bone anchor;
• and
• a compliant member coupled to the deflectable post wherein the compliant member can position the deflectable post in alignment with the longitudinal axis of the bone anchor.

A spine implant comprising:

• a deflectable post mounted in a bore of a shield such that the deflectable post can be deflected towards the shield with the shield limiting deflection of the deflectable post;
• the deflectable post having a mount extending beyond the shield whereby the mount is exposed and adapted to be connected with a spinal device;
• the shield mounted to a bone anchor such that the deflectable post is substantially in-line with the bone anchor;
• and
• a compliant member coupled to the deflectable post wherein the compliant member is positioned and configured to align the deflectable post with the bone anchor.