Minimum 5 Year Results of Posterior Lumbar Interbody Fusion with Cages in Lumbar Spondylolisthesis / 대한척추외과학회지

ABSTRACT

STUDY DESIGN: A retrospective study OBJECTIVES: To examine the mid term clinical and radiologic findings of patients treated by Posterior Lumbar Interbody Fusion (PLIF) with cages in spondylolisthesis. LITERATURE REVIEW The clinical result of PLIF with cages is satisfactory. PLIF with cages is a useful treatment for spondylolisthesis. MATERIALS AND METHODS: Forty-two patients were followed up for more than 5 years. Their mean age was 53 years and the mean follow-up period was 68 months. Twenty-one cases were the isthmic type, and 21 cases were the degenerative type. The low back pain score, Lin s clinical result, perioperative value of slippage, anterior intervertebral disc space height, radiological change in the adjacent level and complications were evaluated. RESULTS: The preoperative lower back pain score improved from 46.7 to 86.4 points at the last follow-up (p.0.05). Thirty-eight patients (91%) showed excellent or good results. The preoperative value of slippage improved from 17.5% to 5.7% (p.0.05). The anterior intervertebral disc space height increased from 10.0 to 14.5 mm (p.0.05). There were changes in the above and lower adjacent segments in 12 cases (28%). Two of these cases required surgery. CONCLUSIONS: PLIF with cages might be an effective method in spondylolisthesis. However, the long-term follow-up showed changes in the adjacent segment.