Design and clinical application of the cervical threaded fusion cage of EH composite type

Objective To evaluate the effectiveness and safety of the cervical threaded fusion cages of EH composite type (EHTFC). Methods After a standard anterior cervical discectomy and on the base of recovery of the cervical interbody height and normal cervical lordosis, the further decompression was performed with trepanation, and then EHTFC was inserted. Results Of thirty patients, 19 were male and 11 female, the median age was 49 years. Twenty-one patients underwent fixation on one segment,and 9 patients on two segments.All patients were free of intraoperative complications and postoperative infection. They were followed up for 6 to 30 months,and graft recipient site-related complications, including graft collapse, graft extrusion or impaction on the spinal canal, or related foramens, did not occur. There was no radiolucent band around EHTFC. The preoperative scores of JOA were 5 to 13 points and 12 to 17 points postoperatively with a mean recovery rate of 83%. Conclusions EHTFC not only provides immediate biomechanical stability, bus also restores and sustains cervical interbody height and lordosis. We substitute EHTFC for autogenous iliac graft absolutely and effectively and avoid the complications of donor site.