【摘要】 金属松质骨螺钉是应用于骨折内固定最广泛的材料之一,临床上有许多螺钉的松动、脱出导致内固定的失败的病例报道。螺钉的松动、脱出与螺钉的拔出力有关。螺钉拔出力与螺钉的材料、螺纹的几何形态、骨质量、螺钉操作技术等密切相关。更多还原

【Abstract】 Metallic cancellous screw is one of the fixation devices widely used for bone fractures. It has always been reported that many cases of internal fixation failed just because of screw loosening or pullout. The stability of fixation is associated with the pullout strength of screws. The pullout strength strongly depends on the geometrical design of the screw thread, the material and the insertion technique of the screw, and the bone mineral density of the insertion site of the screw.更多还原