Symptomatic adjacent segment disease after single-lever anterior cervical discectomy and fusion: Incidence and risk factors

AbstractThe purpose of this study was to determine the incidence and risk factors of symptomatic adjacent segment disease (ASD) following single-lever anterior cervical discectomy and fusion (ACDF) for cervical degenerative diseases.From January 2000 to December 2010, a total of 582 patients with ce