Surgical Options

Surgery is often indicated for patients with lumbar spinal stenosis with or without degenerative spondylolisthesis.

HP7 Pt Reparon flexion HP8 Pt Reparon extension
HP9 Pt Reparaon axial

Lateral radiographic images in flexion and extension and axial MRT-image of a typical patient with stenosis at L4/L5 and Grade I degenerative spondylolisthesis (images kindly provided by Christian Reparon, Göttingen).

Many Surgical Options Have Disadvantages

Surgical decompression alone is usually an effective treatment in the short term. However, the removal of bone and soft tissue can destabilize the segment.1-3 Without additional stabilization, stenosis can recur, spondylolisthesis can progress, and post-operative instability in flexion (and coupled translation) can occur.

Methods of segmental stabilization after decompression can compromise spinal function.4–6 Rigid fixation and fusion is accepted as the gold standard for patients with segmental instability. But fusion can also be problematic. The surgery is invasive, lengthy, and involves a large exposure of internal tissue. Placing pedicle screws can be a lengthy procedure, and screw-related complications are common. After surgery, the patient’s range of motion is often severely restricted, and surgeons as well as patients worry about adjacent level degeneration.

HP10 Adjacent Segment

Adjacent segment degeneration after fusion.

LimiFlex™ is Different

LimiFlex™ stabilizes the segment effectively while still allowing a normal range of motion, without many of the common disadvantages associated with other currently available treatments for segmental stabilization.

HP11 Achieving stability after decompression

Decompression alone can increase the range of motion and the laxity of the segment, whereas after standard stabilization measures the treated segment is often rigidly fixed and immobile. Stabilization with LimiFlex™ increases segmental stiffness while restoring the range of motion.

References

1. Herkowitz HN and Kurz LT. J Bone Joint Surg 1991;73:802–8
2. Richter A et al. Eur Spine J 2010;19:283–9
3. Jang JW et al. J Spinal Disord Tech 2012 Oct 15 [Epub ahead of print]
4. Schaeren S et al. Spine 2008;33:E636–42
5. Kim DH et al. Spine J 2012;12:466–72
6. Park P et al. Spine 2004;29:1938–44