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Screw implantation in spinous process for occipitoaxial fixation
1Department of Neurosurgery, King Edward VII Memorial Hospital and Seth G.S. Medical College, Parel, Mumbai 400012, India. atulgoel62@hotmail.com
Summary
Directly implanting screws into the axis spinous process offers a feasible fixation method for occipitoaxial stabilization in congenital craniovertebral anomalies, proving effective in most cases.
Area of Science:
- Neurosurgery
- Orthopedic Surgery
- Spinal Surgery
Background:
- Occipitoaxial instability presents significant challenges in managing congenital craniovertebral anomalies.
- Current fixation techniques for occipitoaxial stabilization require robust methods for secure plate fixation.
Purpose of the Study:
- To evaluate the feasibility and efficacy of direct screw implantation into the spinous process of the axis for occipitoaxial stabilization.
- To assess the outcomes of this technique in patients with congenital craniovertebral anomalies.
Main Methods:
- Direct screw implantation into the axis spinous process was performed in 11 patients undergoing occipitoaxial stabilization.
- Plate fixation was achieved using screws inserted into the spinous process of the axis.
- Follow-up assessments were conducted over a period ranging from 3 to 43 months.
Main Results:
- Screw implantation into the axis spinous process was facilitated by its strong and stubby nature, particularly in cases with occipitalization of the atlas.
- In three patients, dual screw implantation into the spinous process was performed.
- One screw loosened during the follow-up period; however, the remaining screws provided satisfactory fixation and stabilization of the axial plate end.
Conclusions:
- Direct screw implantation into the axis spinous process is a feasible and effective method for occipitoaxial stabilization in congenital craniovertebral anomalies.
- This technique offers a reliable option for securing the axial end of fixation plates, contributing to regional stability.