Early and Mid-term Outcomes of Zero-Profile Implant in Treatment of Cervical Spondylosis with Osteoporosis

Abstract：Objective To analyze the early and mid-term efficacy and safety of Zero-Profile implant in treatment of cervical spondylosis with osteoporosis.Methods From December 2010 to May 2013,18 patients underwent anterior cervical operation with Zero-P in treating cervical spondylosis with osteoporosis.There were 10 cases of cervical spondy-lotic radiculopathy,6 of myelopathy and 2 of mixed Type.The NDI score、JOA score、cervical Cobb angle,height of in-tervertebral space of the fusion segment and dysphagia-related symptoms were reviewed respectively at preoperative and 3 months,12 months and 36 months postoperative.Results All 18 cases were followed-up from 36 to 50 months. The surgery lasted an average of 62 min (range,45 to 100 min),mean blood loss was 50.5mL (range,from 30 to 145 mL).The sign,neurologic symptom,cervical Cobb angle and height of intervertebral space in all cases had significant improvement.There were 2 of 1 8 patients complained minor dysphagia at 3 month follow-up,but none at 1 2 month. Conclusion The early and mid-term clinical and radiographic efficacy of Zero-P used in treating cervical spondylosis with osteoporosis was satisfactory.The device can improve and maintain the cervical lordosis and height of interverte-bral space.The incidence of postoperative dysphagia was low.