Clinical application of combined with axis laminar screw and axis translaminar facet screw fixation technique

Objective To explore the feasibility and application value of combined axis laminar screw and axis translaminar facet joint screw fixation technique in treatment of cervical vertebral injury.Methods From October 2005 to October 2008,36 patients with cervical vertebral injury were treated with axis laminar screw and axis translaminar facet joint screw fixation technique.Results All cases were followed up for 13 to 32 months(18 months on average).Thirty two cases achieved bone fusion,among which,autogenous iliac graft were done in 30 cases and variant bone graft were done in 6 cases.The postoperative CT scan showed all the axis laminar screws and axis translaminar facet joint screws had been placed properly,and did not invade the spinal canal and the spinal cord.Conclusion Axis laminar screw and axis translaminar facet joint screw fixation technique is free from limitation of the vertebral artery in the C2 foramen and the C2 pedicle size,and can prevent the risk of vertebral artery injury during screw insertion.So axis laminar screw and axis translaminar facet joint screw insertion may facilitate it as a supplementary method for conventional posterior axis screw fixation.