Korean J Spine.  2012 Dec;9(4):340-347. 10.14245/kjs.2012.9.4.340.

Primary Limited Lumbar Discectomy with an Annulus Closure Device: One-Year Clinical and Radiographic Results from a Prospective, Multi-Center Study

Affiliations
  • 1Department of Neurosurgery, Sint Lucas-Andreas Ziekenhuis and Academic Medical Center, Amsterdam, The Netherlands. g.j.bouma@amc.uva.nl
  • 2Department of Neurosurgery, University Hospital Mannheim, Mannheim, Germany.
  • 3Department of Neurosurgery, Medical University Innsbruck, Innsbruck, Austria.

Abstract


OBJECTIVE
Discectomy as a treatment for herniated lumbar discs results in outcomes after surgery that are not uniformly positive. Surgeons face the dilemma between limited nucleus removal which is associated with a higher risk of recurrence, or more aggressive nucleus removal which may lead to disc height loss and persistent back-pain. annulus closure devices may allow for the benefits of limited nucleus removal without the increased risk of recurrence. This is an interim report of an ongoing 24-month post-marketing study of the Barricaid(R) annulus closure device, consisting of a flexible polymer mesh that blocks the defect, held in place by a titanium bone anchor.
METHODS
We prospectively enrolled 45 patients at four hospitals, and implanted the Barricaid(R) after a limited discectomy. annulus defect size and volume of removed nucleus were recorded. Reherniations were reported, pain and function were monitored and imaging was performed at regular intervals during 24 months of follow-up.
RESULTS
At 12 months postsurgery, pain and function were significantly improved, comparing favorably to reported results from limited discectomy. Disc height has been well maintained. One reherniation has occurred (2.4%), which was associated with a misplaced device. No device fracture, subsidence or migration has been observed.
CONCLUSION
The use of an annulus closure device may provide a reduction in reherniation rate for lumbar discectomy patients with large annulus defects who are at the greatest risk of recurrence. Using such a device should provide the surgeon increa- sed confidence in minimizing nucleus removal, which, in turn, may preserve disc height and biomechanics, reducing dege- neration and associated poor clinical outcomes in the long-term. A randomized multicenter study evaluating limited discectomy with and without the Barricaid(R) is currently underway, and will provide a higher level of evidence.

Keyword

Discectomy; Disc herniation; Annulus fibrosus; Annulus closure device

MeSH Terms

Biomechanics
Diskectomy
Humans
Hypogonadism
Mitochondrial Diseases
Ophthalmoplegia
Polymers
Prospective Studies
Recurrence
Titanium
Hypogonadism
Mitochondrial Diseases
Ophthalmoplegia
Polymers
Titanium
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