摘要
目的 观察着力点和角度不同的纵向牵拉力作用下颈椎关节的应力变化。方法 采用光弹材料聚碳酸脂和硅橡胶按 1∶1比例制成颈椎模型 ,通过计算模型上形成的等差线干涉条纹级数 ,分别观察C4～ 7颈椎关节后缘在各种拉力作用下的应力变化。结果 颈椎模型受力后 ,在光屏上可以清晰地显示等差线干涉图谱 ,计算结果显示 ,位于C1或C2 的牵拉力所产生的应力普遍较高 ;就力的方向而言 ,C4 ,5关节以 15°的牵拉力所产生的应力最高 ,C5,6和C6,7关节以 2 5°的牵拉力所产生的应力最高。结论 颈椎关节后缘所受拉应力大小与牵拉力的着力点和方向之间存在密切关系 ,临床施行颈椎拔伸手法时 ,根据病变关节的不同 ,应选择合适的着力点和牵拉方向。
Objective To observe the variations of stress magnitude in the cervcical vertebra exerted by vertical traction force from various angles and different points.[HT5”SS][HT5”H]Methods [HT5”SS]The cervical vertebra model was produced using elastic material of light(polycarbonate) and silica rubber(1∶1).By calculating the arithmetical progression of interference fringe,the author judged the stress magnitude in the posterior edge of the C 4～7 vertebral bodies when different kinds of pulling force acted on.[HT5”H]Results [HT5”SS]The interference pattern was seen clearly on the screen while the force acted on the model.When the pulling force acted on C 1 or C 2,the greater magnitude of the stress presented in the joints.When the force was acting at an angle of 15° the maximum stress presented in C 4,5 and when the force acted at an angle of 25° the maximum stress presented in C 5,6 and C 6,7 .[HT5”H]Conclusion [HT5”SS]The stress distributed upon the posterior edge of the vertebral joints is closely related to the points that the force acted on and the direction of the force.Appropriate points and direction of the pull should be selected according to the change of the lesional joints when manual manipulation is used for the treatment of cervical vertebral disease. [WT5”HZ]
出处
《中国骨伤》
CAS
2000年第6期327-328,共2页
China Journal of Orthopaedics and Traumatology
基金
浙江省中医管理局重点项目! (项目编号 96 30 )
关键词
光弹法
生物力学
颈椎病
WT5”BZ]Light elastic method Cervical vertebrae Biomechanics
