Surgical Intervertebral Implant Forming a Swivel Joint

A surgical implant that supports and assists movement of adjacent vertebrae comprising:

• a top part and a bottom part associated with the spinous process of one of the vertebrae, each part comprising means for association with one process and reciprocal means for rotational association with the other part and forming a swivel joint.

A linking system between at least an implant and/or a bone structure comprising:

• a flexible band, at least one attachment element for the band that attaches the band around all or part of the parts, the attachment element comprising a hole arranged so that the band passes through it, and tightening means that adjust tightness of the band around the parts.