Ni C
Zhonghua Wai Ke Za Zhi. 1989 Jun;27(6):333-6, 381.
Relation between the integrity of the internal structure of upper femur and femoral neck fracture was investigated by means of photo-electric technique. It was found that the stress increased significantly in the upper femur when its calcar femoral was defective, and that the nearer the defective area to the femoral head the greater was the stress. This increased stress was especially significant at the heel strike period of stance phase during walking. As a result of osteoporosis and deficit of the calcar femoral in the elderly, upper femur fracture, mostly subcapital or transcervical type is commonly seen in the aged. The feasibility and principle of internal fixation with thread-screw pins for subcapital and transcervical fracture have been discussed in conjunction with the distribution of tensile and compressive stresses.
采用光电技术研究了股骨上段内部结构完整性与股骨颈骨折之间的关系。结果发现，当股骨距缺损时，股骨上段的应力显著增加，且缺损区域距股骨头越近，应力越大。这种增加的应力在步行站立期的足跟触地阶段尤为显著。由于老年人骨质疏松和股骨距缺失，股骨上段骨折，大多为头下型或经颈型，在老年人中较为常见。结合拉应力和压应力的分布，讨论了用螺纹针内固定治疗头下型和经颈型骨折的可行性及原则。
