Objective: To explore the clinical efficacy of the percutaneous balloon kyphoplasty for osteoporotic vertebral compression fractures with osteonecrosis.
Methods: The clinical data of 31 patients with osteoporotic vertebral compression fractures associated with osteonecrosis from January 2005 to January 2008 were analyzed retrospectively. There were 13 male and 18 female in this study. The mean age of the patients was 71 years (range from 57 to 84 years). The back pain lasted for 4.2 months (from 1 month to 10 years). Radiography, MRI and CT examination were performed. The patients were treated by percutaneous balloon kyphoplasty and the vertebral body tissue was extracted to perform common pathological examination. The anterior vertebral height was measured on a standing lateral radiograph before operation, after operation (one day after operation) and at the final follow-up. A Visual Analog Scale (VAS) and the Oswestry Disability Index (ODI) were chosen to evaluate pain status and functional activity.
Results: The mean follow-up was for 27 months (range, 18 to 48 months). The anterior vertebral body height of fracture vertebra was restored from (34.7 +/- 3.1)% preoperatively to (71.4 +/- 2.3)% postoperatively, and to (70.2 +/- 2.5)% at the final follow-up. There was a significant improvement between preoperative and postoperative values (P < 0.05) and no difference between postoperatively and at the final follow-up (P > 0.05). The VAS was 8.7 +/- 0.4 preoperatively, 2.3 +/- 0.7 postoperatively, and 1.9 +/- 0.2 at the final follow-up; and the ODI was 89.1 +/- 2.7 preoperatively, 31.7 +/- 3.1 postoperatively, and 29.1 +/- 2.7 at the final follow-up. There was statistically significant increment in the VAS and ODI postoperatively compared with preoperatively (P < 0.05), while there was no statistically significant differences between postoperatively and at the final follow-up (P > 0.05). There was a significant increment between preoperative and final follow-up values (P < 0.05). Asymptomatic cement leakage occurred in two cases. New vertebral fracture occurred in one case.
Conclusion: Balloon kyphoplasty is a safe and effective procedure for osteoporotic vertebral compression fractures with osteonecrosis.
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