蒋伟宇,于 亮,马维虎,赵刘军,徐荣明.寰枢椎后路动态固定系统有效性的实验研究[J].中国脊柱脊髓杂志,2013,(12):1097-1100. |
寰枢椎后路动态固定系统有效性的实验研究 |
中文关键词: 寰枢椎 动态固定系统 有效性 生物力学 |
中文摘要: |
【摘要】 目的:测试自主设计的寰枢椎后路动态固定系统的有效性。方法:根据寰枢椎的解剖特征及常规寰枢椎后路椎弓根螺钉置钉技术,设计符合寰枢椎运动方式的新型寰枢椎后路动态固定系统,并测试其有效性。将8具成人枕颈标本(C0~C4)依次按完整状态组(A组)、寰枢椎不稳状态组(B组)、寰枢椎后路动态固定状态组(C组)及寰枢椎后路椎弓根螺钉固定状态组(D组)的顺序进行测试。在三维运动试验机(KD-101)上测试4组模型的颈椎运动范围(range of motion,ROM),所有标本测试时施加1.50N·M力偶矩按前屈/后伸、左/右侧屈、左/右轴向旋转的顺序进行,取其均值,所得结果进行比较。结果:B组与A组在屈伸状态、侧屈状态和轴向旋转状态的ROM分别相差41%、44%、9%,差异有统计学意义(P<0.05)。C组与A组在屈伸、侧屈和轴向旋转状态的ROM分别相差8%、9%、9%,差异无统计学意义(P>0.05);C组ROM与B组比较分别相差46%、50%、17%,差异有统计学意义(P<0.001)。D组固定后在屈伸、侧屈、轴向旋转状态的ROM与A组分别相差35%、46%、58%,差异有统计学意义(P<0.001);与B组分别相差62%、70%、61%,差异有统计学意义(P<0.001);与C组分别相差30%、41%、53%,差异有统计学意义(P<0.001)。结论:寰枢椎后路动态固定系统能够有效地限制寰枢椎的不稳,同时又能保留寰枢椎一定的屈伸、侧屈和旋转活动功能。 |
The efficacy of posterior atlanto-axial dynamic fixation system, an experimental study |
英文关键词:Atlanto-axial Dynamic fixation system Effectiveness Biomechanics |
英文摘要: |
【Abstract】 Objectives: To test the efficacy of self-designed posterior dynamic fixation system. Methods: According to the anatomic features and routine posterior pedicle screw technique of atlanto-axial vertebrae, a posterior atlanto-axial dynamic fixation system was designed, and its effectiveness was tested. Eight human cadaveric specimens(C0-C4) under test were subgrouped as: the intact group(group A), instable group(group B), posterior atlanto-axial dynamic fixation group(group C) and posterior atlanto-axial pedicle screw fixation group(group D). The three dimensional ranges of motions of C1 relative to C2 under loading of ±1.5N·M were measured under flexion/extension, left and right lateral bending, and left and right axial rotation. The obtained data were statistically analyzed. Results: The results showed that: (1)the difference between group B and A in ROM of flexion/extension, left/right lateral bending and rotation was 41%, 44% and 9%, respectively, with significant differences(P<0.05); the difference between group C and B in ROM was 46%, 50% and 17%, respectively, with significant differences(P<0.001); the difference between group D and B in ROM was 62%, 70% and 61%, respectively, with significant differences(P<0.001). (2)the difference between group C and A in ROM of flexion/extension, left/right lateral bending and rotation was 8%, 9% and 9%, respectively, with no significant differences(P>0.05). (3)the difference between group D and A in ROM of flexion/extension, left/right lateral bending and rotation was 35%, 46% and 58%, respectively, with significant differences(P<0.001); and compared with group C, the difference was 30%, 41% and 53% respectively, which showed significant differences(P<0.001). Conclusions: The posterior atlanto-axial dynamic fixation is effective for atlanto-axial dislocation and instability, as well as maintaining the ROM of C1-C2. |
投稿时间:2013-04-18 修订日期:2013-07-30 |
DOI: |
基金项目:浙江省医药卫生科技计划项目(编号:2011RCB034);浙江省自然科学基金项目(编号:LY02H06001) |
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