Protect ends with capped self-locking washers incorporating a spring steel insert to ensure permanentretention of cap in exposed locations.
对外露端部的保护，可采用自锁螺帽加以弹簧垫，以确保螺帽持续牢固的预紧力。
2
Retention of former fixation or change to a permanent fracture fixation were determined by the healing process and the stability of the fixation 3 ~ 6 months after the trauma surface healing.