中国组织工程研究与临床康复2011，Vol.15Issue(48)：8993-8997,5.DOI:10.3969/j.issn.1673-8225.2011.48.016
后凸成形和传统钉道骨水泥强化对骶骨钉松动的生物力学作用
Biomechanical effects of kyphoplasty-assisted versus traditional bone cement augmentation on the loosened sacral screws
摘要
Abstract
BACKGROUND: Kyphoplasty-assisted bone cement augmentation can be used in lumbar pedicle screw fixation of osteoporotic patients.OBJECTIVE: To assess the fixation strengths of loosened sacral screws augmented with kyphoplasty-assisted and traditional bone cement techniques.METHODS: Fresh sacra were harvested from nine osteoporotic cadavers. After testing bilaterally placed unicortical and bicortical pedicle screws, two unicortical pedicle screws with the traditional and kyphoplasty-assisted cement augmentations were established on the same sacrum. Following 2000 cyclic compression loading to screw head on a MTS machine, their maximum pull-out forces were recorded and compared. RESULTS AND CONCLUSION: The bone mineral densities of nine specimens were ranged from 0.61 to 0.77 g/cm2 (0.71 g/cm2 in average). The mean maximum pull-out forces of unicortical and bicortical screws, and traditional and kyphoplasty-assisted cement screws were 203, 325, 437, and 565 N, respectively. The pull-out force was significantly higher in bicortical screw compared with unicortical (P < 0.05); however, these two fixations exhibited markedly lower pull-out strength compared with two cement augmentation techniques (P < 0.05). The pull-out strength was significantly higher in kyphoplasty-assisted cement augmentation group compared with traditional bone cement technique (P < 0.05). In addition, a significant positive correlation was exhibited between bone mineral density and pull-out force for the four fixations (P < 0.05). Results demonstrated that traditional and kyphoplasty-assisted cement augmentations can serve as the salvage technique for loosening sacral screw. However, kyphoplasty-assisted augmentation can provide higher stability.关键词
骨水泥/骶骨钉/内固定失败/硬组织植入物/生物力学/骨质疏松/组织工程分类
医药卫生引用本文复制引用
周冬长,王丽冰,曾丽雯,黄阳亮,于滨生..后凸成形和传统钉道骨水泥强化对骶骨钉松动的生物力学作用[J].中国组织工程研究与临床康复,2011,15(48):8993-8997,5.基金项目
The Science and Technology International Cooperation Program of Guangdong Province,No.2009B050700023 （）
2009年广东科技计划省国际合作项目(2009B05 0700023). （2009B05 0700023）
