Influence of the Posterior Lumbar Interbody Fusion on the Sagittal Spino-Pelvic Parameters in Isthmic L5-S1 Spondylolisthesis

• DOI: 10.1097/bsd.0b013e31828af6f0
• Publication Date: 2013-03-22T22:26:28Z
• Authors: Yu Feng; Liang Chen; Yong Gu; Zhi-Ming Zhang; Hui-Lin Yang; Tian-Si Tang
• Keywords: Pelvic tilt

Prospective study of the sagittal spino-pelvic parameters and deformity in low-grade isthmic spondylolisthesis preoperation postoperation.To better understand how surgery influences alignment spondylolisthesis.Over past decade, importance was recognized. However, postoperative change balance still unclear.Forty-nine patients (mean age, 53.2±7.2 y) with L5-S1 60 normal volunteers 44.5±8.4 were included study. Each subject had a radiograph that allowed measurement before after surgery. The follow-up duration at least 2 years. Sagittal measured for comparison.Pelvic incidence, pelvic tilt (PT), sacral slope, lumbar lordosis (LL), 5 lumbosacral angle smaller than those patients. All changed significantly posterior interbody fusion. Postoperative PT reduced by 4.9 degrees, which no significant difference compared control group (P=0.601). changes slip degree height intervertebral disk revealed correlation increase LL (r=-0.483, P=0.003; r=0.365, P=0.010).The improvement may play an important role reconstruction therapeutic outcome. restoration would wedged cage. To get LL, size geometry cage recommended to be evaluated surgical treatment.