[Posterior atlantoaxial fixation using vertex multiaxial screw system]

Area of Science:

• Neurosurgery
• Orthopedic Surgery
• Spinal Fusion Techniques

Background:

• Atlanto-axial instability presents significant challenges in spinal surgery.
• Effective stabilization of the atlanto-axial junction is crucial for patient outcomes.
• Minimally invasive techniques are increasingly sought for spinal fusion.

Purpose of the Study:

• To evaluate the efficacy and benefits of the Vertex multiaxial screw system for atlanto-axial junction stabilization.
• To assess the safety and complication rates associated with this surgical technique.
• To determine the functional outcomes following atlanto-axial fusion using the Vertex system.

Main Methods:

• Surgical technique involved precise screw placement in the atlas and axis.
• Entry points and screw trajectories were standardized for optimal fixation.
• Clinical outcomes and radiographic results were assessed post-operatively.

Main Results:

• All screws were placed without neurovascular injury or surgical complications.
• Successful repositioning and fixation of the atlanto-axial joint were achieved in all cases.
• Significant improvement in Japanese Orthopaedic Association (JOA) scores from 9.6 pre-operatively to 15.9 post-operatively.

Conclusions:

• The Vertex multiaxial screw system provides a reliable and safe method for atlanto-axial fusion.
• This technique is a viable alternative for stabilizing the atlanto-axial complex, suitable for young patients.
• The system facilitates good functional recovery and spinal stability.