Abstract: Objective To Explore the clinical outcomes of bilateral kyphoplasty forosteoporotic compression fracture with the new G-arm X-ray machine. Methods 118 cases(193 vertebrae)who sustained osteoporotic vertebral compression fracture and underwent percutaneous kyphoplasty were reviewed retrospectively. All cases were divided into two groups according to unilateral with common C-arm X-ray machine or bilateral with the new G-arm X-ray machine approach. The common group( 68 patients,121 vertebrae)while the new X-ray group(50 patients,72 vertebrae ). The operation time,the amount of bone cement and the visual analogue scale( VAS),vertebral body height,Cobb angle at pre and post-operation and incidence of complications were used to observe the difference between two groups. Results All but one patient underwent surgery successfully. The common group had an average operative time of(55 ± 12)min while the new X-ray group(53 ± 14)min. There was no significant difference in the operation time between two groups( P﹥0 . 05 ). The VAS score decreased significantly after operation ( P﹤0 . 05 ),but no significant difference was noted between two groups( P ﹥0 . 05 ),while the rate of adjacent vertebral fractures had significant difference( P ﹤ 0 . 05 ). Conclusion Both unilateral or bilateral kyphoplasty are reliable for osteoporotic vertebral compression fractures,but the bilateral kyphoplasty has the advantage of better recovery for average vertebral height and local Cobb angle and lower adjacent vertebral fractures rate.

Key words: spinal fractures, kyphoplasty, tomography, X-ray computed