This is a single blinded randomized 1:1, controlled, prospective clinical study to evaluate fusion status and patient reported outcomes in circumferential lumbar fusion between L2-S1 at a single level with posterior screw fixation (Camber Spine Orthros System) and anterior surgery consisting of one of the treatment groups: subjects treated with the SPIRA™-A Interbody Device and HCTP/p DBM or subjects treated with Medtronic Divergent-L or Perimeter™ PEEK ALIF Interbody Device and rhBMP-2 (6mg per level).
