====== Interspinous plate ======

see also [[Interspinous spacer]].

Interspinous [[plate]]s (e.g. [[Aspen]]® (Lanx), [[Affix]]TM (Nuvasive), [[Spire]]® (Medtronic)) clamp across two [[spinous process]]es to fixate them (unlike [[X-Stop]]TM which just limits extension). The Aspen® clamps have a space for a [[graft]] that may optionally be used to promote fusion between the spinous processes. Interspinous plates may be used to augment other constructs, e.g. [[lateral interbody fusion]],
((Wang JC, Haid RW,Jr, Miller JS, et al. Comparison of CD HORIZON SPIRE spinous process plate stabilization and pedicle screw fixation after [[anterior lumbar interbody fusion]]. J Neurosurg Spine. 2006; 4: 132–136))
but are not intended for [[stand-alone]] use. Biomechanical stability is reported to be similar to bilateral pedicle screws in flexion, and unilateral pedicle screws in lateral bending
((Wang JC, Spenciner D, Robinson JC. SPIRE spinous process stabilization plate: biomechanical evalua- tion of a novel technology. J Neurosurg Spine. 2006; 4:160–164)).