Minim Invasive Neurosurg 2010; 53(3): 117-121
DOI: 10.1055/s-0030-1249704
Original Article

© Georg Thieme Verlag KG Stuttgart · New York

Decompression and Interspinous Dynamic Stabilization Using the Locker for Lumbar Canal Stenosis Associated with Low-Grade Degenerative Spondylolisthesis

D. Y. Lee1 , S. H. Lee1 , C. S. Shim1 , H. Y. Lee1
  • 1Department of Neurosurgery, Wooridul Spine Hospital, Seoul, Korea
Further Information

Publication History

Publication Date:
31 August 2010 (online)

Abstract

Background: Decompression and spinal fusion have been generally recommended for spinal stenosis associated with low-grade degenerative spondylolisthesis (DS), although this is still controversial. The purpose of the present study is to analyze the clinical and radiological outcomes of interspinous dynamic stabilization using the Locker (WINNOVA co, Seoul, Korea) for lumbar canal stenosis with grade I DS.

Methods: The authors performed a retrospective review of 23 consecutive patients who underwent single level decompression and the Locker application for lumbar canal stenosis with grade I DS and were followed up for at least 2 years. Excluded were those with DS grade II or higher and DS combined with foraminal disc herniation/stenosis. The mean age of patients at the time of surgery was 62.1 years (range: 45−81 years).

Results: There were no complications in the perioperative period. At a mean follow-up duration of 28.3 months (range: 24−32 months), visual analogue scale scores for back pain, leg pain, and Oswestry disability index had decreased significantly; from 4.6, 7.2, and 38.5% to 2.4, 2.6, and 15.3%, respectively. Clinical success was achieved in 87% of the patients. The mean percentage of slippage did not change significantly. The mean sagittal rotation angle significantly decreased from 9.7 to 6.5° (p=0.01). One patient (4.3%) underwent secondary fusion surgery due to persistent pain.

Conclusions: Decompression and interspinous dynamic stabilization using the Locker yielded favorable clinical and radiological outcomes for lumbar canal stenosis with grade I DS and could be an alternative for spinal fusion. However, further long-term follow-up studies are necessary.

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Correspondence

S. H. LeeMD, PhD 

Department of Neurosurgery

Wooridul Spine Hospital

47-4 Chungdam-dong

Gangnam-gu

Seoul 135-100

Korea

Phone: +82/2/513 8150

Fax: +82/2/513 8146

Email: shlee@wooridul.co.kr