?:definition
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As specified in 21 CFR 888.3070 (b)(2), Class III (premarket approval), when intended to provide immobilization and stabilization of spinal segments in thoracic, lumbar, and sacral spine as an adjunct to fusion in the treatment of degenerative disc disease and spondylolisthesis other than either severe spondylolisthesis (grades 3 and 4) at L5-S1 or degenerative spondylolisthesis with objective evidence of neurologic impairment.
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