中国组织工程研究2012，Vol.16Issue(30)：5558-5562,5.DOI:10.3969/j.issn.2095-4344.2012.30.011
寰枢椎后路悬臂樑支撑线缆牵拉复位固定的生物力学稳定性评价
The biomechanical stability of cable dragged reduction and cantilever beam internal fixation by posterior atlantoaxial approach
黄海锋 1刘浩 2李涛 2龚全 2罗玉坤 2王贝宇2
作者信息
- 1. 绵阳市中心医院脊柱外科,四川省绵阳市,621000
- 2. 四川大学华西医院骨科,四川省成都市,640041
- 折叠
摘要
Abstract
BACKGROUND: There are many methods of internal fixation for atlantoaxial dislocation caused by odontoid fractures, but all of them emphasize reset before fixation, so there is no a internal fixation both with satisfactory biomechanical stability and better intraoperative reset ability.
OBJECTIVE: To evaluate the biomechanical properties of cable dragged reduction and cantilever beam internal fixation via posterior approach for upper cervical spine stability.
METHODS: Occipitocervical spine specimens from twelve fresh human cadaveric were selected to establish fracture test model of odontoid Anderson type 2 which were mounted in a spine-testing machine to record the three-dimensional angular movement under 1.5 N-m load. The specimens were fixed by Brooks titanium cable, Magerl screws, the lateral mass screws in the atlas+axial pedicle screw and cable dragged reduction and cantilever beam.
RESULTS AND CONCLUSION: Under 1.5 N-m load, the range of motion (ROM) during flexion and side bending of cable dragged reduction and cantilever beam internal fixation group were significantly smaller than those of other groups (P < 0.05). The ROM during in extension of cable dragged reduction and cantilever beam internal fixation group was significantly larger than that of Magerl screws fixation group (P < 0.05), but which was smaller than that of the Brooks titanium cable and pedicle screw fixation groups (P < 0.05). The ROM during rotation of cable dragged reduction and cantilever beam and Magerl screws fixation groups had no difference (P> 0.05), but which was smaller than that of the Brooks titanium cable and pedicle screw fixation groups (P < 0.05). The results indicated that stability of cable dragged reduction and cantilever beam internal fixation via posterior approach are better than the other groups, but which was only lower than Magerl screws fixation in the stability of the extension.
关键词
齿状突骨折/悬臂樑支撑线缆牵拉复位内固定/后路内固定/复位/生物力学分类
医药卫生引用本文复制引用
黄海锋,刘浩,李涛,龚全,罗玉坤,王贝宇..寰枢椎后路悬臂樑支撑线缆牵拉复位固定的生物力学稳定性评价[J].中国组织工程研究,2012,16(30):5558-5562,5.
