Abstract：Objective To analyze the risk factors for adjacent-level ossificationskin after anterior cervical decompression and fusion.Methods The clinical data of 105 patients with cervical intervertebral disc herniation who underwent anterior cervical discectomy and fusion(ACDF) by Zero-P implant(n=51) or traditional titanium plate with cage(n=54) between June 2009 and August 2013 were retrospectively analyzed.The Bazaz dysphagia grading、the Neck Disability Index(NDI) 、Japanese Orthopaedic Association (JOA) scoring、ameliorative rate of symptom in both groups were measured and compared.The radiographs of the cervical spine were made to assess plate-to-dis distance and adjacent-level ossification development.Results Surgical method，age，gender，blood loss，ameliorative rate of symptom，plate-to-dis distance and Osteoporosis were risk factors of calcaneal incision complications.Conclusion It is helpful for avoiding adjacent-level ossification after nterior cervical decompression and fusion by using Zero-P，anti-osteoporosis treatment before operation，reducing blood loss，suitable plate and find-out the suitable position for the plate.
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