【摘要】 目的:对寰枢椎齿状突Ⅱ型骨折实验模型的4种后路内固定方式下的三维运动范围进行实验研究,为临床选择内固定方法提供生物力学依据。方法:实验采用10具新鲜人体寰枢椎标本(C0-C3),制成寰枢椎齿状突Ⅱ型骨折实验模型,使实验模型在不同固定方式下模拟人体寰枢椎的三维运动(前屈、后伸、左右侧屈、左右旋转),并选用应变式传感器对运动范围的角度进行测量研究。结果:在1.53Nm作用下4点固定的寰枢椎三维运动范围最小,其前屈、后伸、左右侧屈、左右旋转角度分别为1.8°、2.0°、1.2°、1.1°、3.2°、3.0°。结论:实验研究表明4点固定有更好的生物力学稳定性,采用应变式传感器能够对寰枢椎的三维运动进行测量,具有直观、实时、方法简单、结果可靠等优点。更多还原

【Abstract】 Objective:To study three-dimensional movement of four type of posterior atlantoaxial fixation techniques of type Ⅱ odontoid process fracture.Methods:Ten fresh cadaveric specimens （C₀-C₃）were studied to compare three-dimensional movement of four type posterior atlantoaxial fixation techniques by strain sensor.Results:According to experiment,the movement range of four-point fixation techniques was least.Range of three-dimensional movement of atlantoaxial joint in four-point fixation technique for flexion,extension,left lateral bending,right lateral bending,and left axial rotation,right axial rotation were 1.8°,2.0°,1.2°,1.1°,3.2°,3.0°.Conclusion:Four-point fixation techniques is superior to other fixation techniques.The study shows that this method had following merit:direct-viewing,real-time,simple in measurement and reliable in result.更多还原