Dynamic transpedicular stabilisation and decompression in single-level degenerative anterolisthesis and stenosis

Area of Science:

• Spinal Surgery
• Orthopedics
• Degenerative Spine Disease

Background:

• Degenerative anterolisthesis and stenosis have multiple treatment options.
• Posterior decompression with fusion is common, but dynamic stabilization is emerging.
• The Dynesys system offers dynamic transpedicular stabilization for this condition.

Purpose of the Study:

• To evaluate the safety and efficacy of the Dynesys system for single-level degenerative anterolisthesis and stenosis.
• Assess outcomes of decompression combined with dynamic transpedicular stabilization.

Main Methods:

• Prospective study of 30 patients with single-level degenerative anterolisthesis and stenosis.
• Patients underwent decompression and single-level Dynesys stabilization.
• Follow-up for 24 months included radiographs, Oswestry Disability Index (ODI), VAS pain scores, and walking distance.

Main Results:

• Significant reduction in back pain (6.5 to 2.5) and leg pain (5.4 to 0.6).
• Pain-free walking distance increased from 500m to over 2km; ODI decreased from 54% to 18%.
• Minor complications: screw loosening (2/30), adjacent segment disease (3/30).

Conclusions:

• Single-level Dynesys stabilization with decompression is safe and effective for degenerative anterolisthesis and stenosis over 2 years.
• This method avoids bone grafting associated with fusion.
• Adjacent segment disease remains a potential concern.