Patent ID: 8025681

Claim:
A dynamic stabilization system for attachment to vertebral bodies, said dynamic stabilization system comprising: a first bone anchor coupled to a first polyaxial head and a second bone anchor coupled to a second polyaxial head, wherein a first longitudinal centroidal axis passing through a center of said first polyaxial head is aligned with a center of rotation and a second longitudinal centroidal axis passing through a center of said second polyaxial head is aligned with said center of rotation, wherein said center of rotation is within a preselected A-P mark range of said vertebral bodies when said dynamic stabilization system is attached to said vertebral bodies, and wherein said first bone anchor is alignable independently of said first longitudinal centroidal axis and wherein said second bone anchor is alignable independently of said second longitudinal centroidal axis; a first member having a first end movably coupled to the said first polyaxial head and a second end; and a second member having a third end coupled to said second polyaxial head and a fourth end moveably coupled to said second end, wherein after said dynamic stabilization system is attached to said vertebral bodies said first and second members are configured to maintain the alignment of said first and second longitudinal centroidal axes with said center of rotation during three dimensional movement of said first member relative to said second member.