Objective: To investigate the incidence and risk factors for postoperative residual back pain after percutaneous kyphoplasty(PKP). Methods: 455 patients with osteoporotic vertebral compression fracture (OVCF) who treated with PKP from June 2014 to January 2016 were selected. Postoperative VAS score≥4 was defined as residual back pain. Patients with VAS≥4 were enrolled into residual back pain group. The same number of patients without postoperative residual back pain were randomly selected as the control group. Comparison of age, gender, preoperative bone mineral density (BMD) value, number and type of vertebral fracture, volume and distribution of bone cement, thoracolumbar fascia injury, the anterior height and kyphotic angle of fractured vertebrae between two groups were analyzed by univariate and multivariate logistic regression. Results: 43 patients (9.5%) were presented with postoperative residual back pain. The preoperative BMD value, the number of fractured vertebrae, the type of fractured vertebrae, bone cement distribution, thoracolumbar fascia injury, postoperative height of fractured vertebrae and postoperative kyphotic angle of fractured vertebrae were significantly different between two groups (P<0.05). Multivariate logistic regression analysis revealed that preoperative BMD value (OR=2.57, P=0.015), the number of fractured vertebrae (OR=3.28, P<0.001), type I vertebral fracture (OR=4.05, P=0.018), O type of bone cement distribution (OR=2.13, P=0.005), thoracolumbar fascia injury (OR:=5.21, P=0.041) and postoperative kyphotic angle of fractured vertebrae (OR=3.59, P=0.027) were independently correlated with postoperative residual back pain after percutaneous kyphoplasty.Conclusions: The incidence of postoperative residual back pain after percutaneous kyphoplasty was 9.5%. In addition, preoperative low BMD value, multi-segmental vertebral fracture, type I vertebral fracture, O type of bone cement distribution, the presence of thoracolumbar fascia injury and postoperative big kyphotic angle of fractured vertebrae were independent risk factors for residual back pain after percutaneous kyphoplasty. |
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