Abstract: ［Abstract］ Objective〖HTSS〗〓To evaluate the technical feasibility and clinical effects of kyphoplasty accomplished with minimal incision for the treatment of severe osteoporotic vertebral compression fracture(sOVCF).
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓 Sixtyfive patients with severe osteoporotic vertebral compression fractures treated with kyphoplasty accomplished with minimal incision were included in the study. A total of 73 vertebrae were involved，including 8 T10，7 T11，19 T12，23 Ll，5 L2 and 3 L4. All the damaged vertebral bodies were compressed more than 2/3 and were treated with kyphoplasty accomplished with minimal incision. All patients were followed up for more than one year. Mean duration of surgery, the times of Xray used during operation were recorded. Visual Analogue Scale(VAS) score, Oswestry Dability Index(ODI), anterior height of vertebral body, Cobb angle were measured before operation, 3 days after operation, and 1 year after operation. Complications such as cement leakage, pulmonary embolism and so on were counted.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓All patients were performed the operation successfully, except for 8 cases of cement leakage including 5 cases of intervertebral disc leakage and 3 cases of leakage to paraspinal soft tissue. But there were no symptoms of nerve and spinal cord compression, no pulmonary embolism and other server complications. The mean duration of surgery was (25.4±8.7) min/vertebra and the mean times of Xray used during operation was （12.4±8.3） times. The VAS score, ODI and Cobb angle of patients 3 days and 1 year after operation were significantly lower than those before operation, and the anterior height of vertebral body were significantly higher than those before operation (P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The kyphoplasty accomplished with minimal incision in treatment of very serious osteoporotic vertebral compression fractures can improve the safety of the operation, reduce puncture and intraoperative fluoroscopy, save the time of operation and recovery the height of vertebral and Cobb angle in different degree in the same time. It can quickly relieve pain and gain satisfactory curative effects.

Key words: fractures, compression, percutaneous kyphoplasty, minimal incision