Anchoring device and system for an intervertebral implant, intervertebral implant and implantation instrument

A system for treatment of a spine comprising:

• an intervertebral implant comprising
• a first contact surface adapted and configured to contact a first vertebral endplate,
• a second contact surface adapted and configured to contact a second vertebral endplate,
• a peripheral surface extending between at least a part of the first contact surface and at least a part of the second contact surface,
• a first passage having an opening on the peripheral surface, the first passage extending from the opening toward the first contact surface and being adapted and configured for transit of a front end of an elongated, curved anchor from the peripheral surface to project from the first contact surface,
• a first insertion stop surface proximate to the first passage configured to abut a corresponding second insertion stop surface of an anchor, and
• a first withdrawal stop surface proximate to the first passage configured to abut a corresponding second withdrawal stop surface of an anchor;
• an anchor having a front end, a rear edge, and a longitudinal axis extending between the front end and the rear edge, the anchor comprising
• at least one plate that is elongated and curved along the longitudinal axis of the anchor and that has a width transverse to the longitudinal axis of the anchor,
• at least one slot oriented generally along the longitudinal axis of the anchor and separating the rear edge and at least a reward portion of the plate into a first branch and a second branch, with the first branch being resiliently movable with respect to the second branch,
• a second insertion stop surface oriented angularly to the longitudinal axis of the anchor that is adapted and configured to abut the first insertion stop surface and hold the implant against the first vertebral endplate, and
• a second withdrawal stop surface disposed on one of the branches and oriented angularly to the longitudinal axis of the anchor, the second withdrawal stop surface being adapted and configured to abut the first withdrawal stop surface and inhibit withdrawal of the anchor from the implant;
• and
• instrumentation adapted and configured for insertion of the implant into an intervertebral space, for insertion of the anchor in the implant, and for fixation of the implant to the first vertebral endplate, the instrumentation comprising
• a holder for the anchor comprising a body and a guide surface formed in the body that corresponds to the curvature of the anchor plate, the body having a width less than the width of the plate,
• an impactor comprising a first head configured and adapted to receive the holder and a driver configured and adapted to drive the anchor, and
• a guide elongated along a longitudinal axis extending between a gripping end of the guide and a pushing end of the guide, the gripping end having a second head configured and adapted to grip the implant and comprising a second passage along the longitudinal axis of the guide, the second passage having a shape and dimensions adapted and configured for passage of the anchor and at least part of the holder.