Wallis® Dynamic Posterior Stabilized System

Approach

  • Posterior

Levels

  • L1-L5

Indications

The Wallis Mechanical Normalisation System treats low-back pain that accompanies degenerative lesions of grade II, III and IV (Pfirrmann MRI classification)* in the following indications:

  • Massive herniated disc in young adults / recurrent herniated disc / herniated disc accompanying an L5 sacralization transitional anomaly
  • Degenerative disc disease at a segment adjacent to fusion
  • Degenerative lesions with or without Modic 1
  • Lubar canal stenosis treated by laminotomy (not by complete laminectomy)** 
Wallis Indication

Contraindications

  • Grade V degenerative lesions in the MRI classification of Pfirrmann
  • Spondylolisthesis
  • Osteoporosis
  • Nonspecific low back pain
  • Modic 2 and Modic 3

Related Articles

Product Overview
Instrumentations/Range
 References
Request Product Brochure and Surgical Technique
Patient Brochure
Operative Technique

References

(*) Pfirrmann CWA, Metzdorf A, Zanetti M, Hodler J, Boos N (2001) Magnetic resonance classification of lumbar intervertebral disc degeneration. Spine 26:4873-4878.
(**) Important: If the procedure includes enlargement of a stenotic lumbar canal by resection of the uppern portion of the laminae, make sure to preserve sufficient spinous process thickness.