Abstract: ［Abstract］〓Objective〖HTSS〗〓To study the clinical efficacy of percutanous kyphoplasty(PKP) in vertebral compression fractures of acute and subacute phases.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓The clinical data of 45 patients with osteoporotic vertebral compression fractures(OVCF) receiving PKP were analyzed retrospectively, among whom 23 patients in group A, had been injured in less than 2 weeks and 22 patients in group B, had been injured in more than 2 weeks but less than 2 months. Relevant data were recorded before and after operations including Visual Analogue Scale(VAS) scores, anterior and middle vertebral heights, Cobb angles and bone cement leakage.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓The average followup time lasted for 10.5 months. VAS scores in two groups were in decline. Differences at points in time had statistical significance(P＜005) There was no significant difference in the intergroup, intergroup and interpoint interaction(P＞005). Cobb angles before and after treatments in group B were both much bigger than those of group A, either group A or group B saw a great increase in its Cobb angles after operations(P＜005). Differences in the recovery of Cobb angles after operations for two groups showed no statistical significance(P＞005). For group B, before operations, both anterior and middle vertebral heights were lower than those of group A(P＜005) and the two figures for either group became higher compared with preoperative period(P＜005). There was no significant difference in the height recovery between the anterior and central vertebral bodies in group A and group B(P＞005). Followup reexaminations had found 1 case of cement leakage in anterior vertebral and 1 in intervertebral disc, with no other symptoms in group A. Hospital stays ranged from 3 to 7 days and primary healing of operative incision occurred in all patients. During our visits after surgery, no patients have had a relapse of fractures.
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓PKP can alleviate the pain of patients with thoracic lumbar segment OVCF effectively. Subacute patients can recover to the same level of vertebral body height and Cobb angles as acute patients after operations.

Key words: spinal fractures, osteoporosis, kyphoplasty