Lumbar artificial intervertebral total disc replacement, at one motion segment only, including removal of disc and marginal osteophytes: (a) for a patient who: (i) has not had prior spinal fusion surgery at the same lumbar level; and (ii) does not have vertebral osteoporosis; and (iii) has failed conservative therapy; and (b) not being a service associated with a service to which item 51011, 51012, 51013, 51014 or 51015 applies (Anaes.) (Assist.)