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| Wallis |
The Wallis Stabilization System, treats the pain due to degenerative instability, preserves mobility, anatomy and stability while being fully reversible, therefore leaving all subsequent options open.
- Preserve Anatomy, Keep Options Open:Resulting in the preservation of anatomy, Wallis System keeps all options open in terms of potential future operations for low back disorders.
- Design and Materials:The design and materials minimize need for bony resection and permit an even distribution of stresses on the bone: Anatomical design: grooves that fit the physiological shape of the spinous processes, optimization of the surface of contact: flat polyester band for improved stress pattern on the bone, elasticity: spacer and clips made of PEEK for mechanical properties close to those of bone and openings in the spacer for maximum reduction of the implant rigidity.
- Flexion and Extension:The Wallis Implant limits the amplitude of movement in flexion and extension1Reduction of 35% of the flexion-extension mobility when implanted in a damaged segment (study performed on 6 cadaveric specimens). The Wallis Implant increases the rigidity of the segment in flexion and extension Inflexion and extension the implantation of a Wallis System increases the rigidity by a factor of 1.9 and 1.5 times, respectively.
- Intradiscal Pressure:The Wallis Implant reduces the intradiscal pressure.In an in vitro Finite Element model, the Wallis Implant reduces the intradiscal stresses in a damaged disc both in flexion and extension. The Wallis Implant does not alter the mechanical behavior of the adjacent segment.
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