JOURNAL ARTICLE

Segmental wire fixation for lumbar spondylolysis associated with spina bifida occulta

Takatoshi Yamamoto, Nobuki Iinuma, Kei Miyamoto, Seiichi Sugiyama, Satoshi Nozawa, Hideo Hosoe, Katsuji Shimizu
Archives of Orthopaedic and Trauma Surgery 2008, 128 (10): 1177-82
18040701

INTRODUCTION: The effectiveness of segmental wire fixation technique in repairing lumbar spondylolysis has already been reported. However, whether the technique can be indicated for spondylolysis associated with spina bifida, which is occasionally found with spondylolysis, is not well known. In this study, the authors report the mid-term clinical outcome of the procedure performed in patients with symptomatic lumbar spondylolysis associated with spina bifida occulta.

MATERIALS AND METHODS: Among 20 patients with symptomatic lumbar spondylolysis who underwent segmental wire fixation between 1996 and 2001, four patients associated with spina bifida occulta were evaluated with an average of 32 months follow-up. Bony union at spondylolysis sites and spina bifida was evaluated using plain X-rays and computed tomography (CT) scans. Clinical symptoms were assessed using Japanese Orthopedic Association scores for back pain (JOA scores) and Henderson's evaluation of functional capacity.

RESULTS: The radiographic examinations of the latest follow-ups revealed the following results. Pars defect; in three cases with bilateral defect, one case healed bilaterally and two healed only unilaterally. One case with unilateral defect healed. Spina bifida; two cases showed bony union and two showed no union. Of the four patients operated, two were rated excellent with the remaining two good according to Henderson's evaluation. The recovery rate of JOA score was averaged at 69.7 +/- 23.5%. No serious complications were noted.

CONCLUSIONS: In four cases associated with lumbar spondylolysis and spina bifida, segmental wire fixation provided satisfactory clinical outcomes.

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