Risk Factors for Adjacent Segment Problems after Posterior Instrumentation of the Cervical Spine

Adjacent segment problems after cervical spine instrumentation are widely reported. They can range from asymptomatic adjacent degeneration (ASD) noted on radiographs to symptomatic disease and even instability. While ASD following anterior is well studied, there a paucity of literature posterior instrumentation. We intended identify the risk factors associated with instrumentation, focusing pre-operative surgical parameters. Eighty-seven patients who underwent were recruited. Clinical radiological examination was performed preoperatively up 24 months postoperatively. The collected data included patient demographics, indication for surgery, sagittal parameters (cervical lordosis, C2–7 sagittal-vertical axis), technique number levels instrumented fused, decompressed, level at which ended. Based postoperative evaluation, found in 29.9% patients, which, one required reoperation. Even though, according our univariate analysis, reduced lordosis degenerative spondylosis seemed significantly influence occurrence ASD, multivariate regression analysis did not any independent factors. also that, though may develop fusion spine, this necessarily into requiring revision surgery.