Combined Instrumentation in Lumbar Spondylolisthesis

ABSTRACT

OBJECTIVE: The purpose of this retrospective study is to review the clinical results, fusion rate, quality of reduction and stabilization and effects of cages in the intervertebral space in spondylolisthesis. METHODS: Authors reviewed retrospectively 30 patients who were treated with instrumentation and posterior lumbar interbody fusion(PLIF) between April 1996 to December 1997. RESULTS: Among 30 patients, 13 patients were degenerative type and 17 were isthmic types. The most commonly involved level was L4-5(16cases, 53.3%). Fusion was obtained in 29 patients(96.7%). Clinically, 14 of 17 patients(82.3%) showed excellent or good results in isthmic group, and 11 of 13 patients(84.6%) showed excellent or good results in degenerative group. Postoperative complications developed in three cases(10%), wound infection two cases(6.6%), cage retrodisplacement one case(3.3%). CONCLUSION: PLIF combined with transpedicular instrumentation in lumbar spondylolisthesis showed in all clinical results and fusion rate.