The correct countermeasures are taken to prevent the drill collar screw failure effectively, ensuring the qualitative reliability of drill collar screw.
通过采用合适的对策，有效预防钻铤螺纹失效，从而保证钻铤螺纹的质量可靠性。
Methods 8 cases of failure thoracolumbar fractures treated with pedicle screw fixation were analyzed retrospectively.
方法对8例胸腰椎骨折椎弓根螺钉内固定失败病例进行回顾性分析。
The reasons of internal fixation failure were nonanatomically reduction of fractures, unrigid interal fixation, over early weight bearing and poor placement of lag screw.
内固定失败原因是术中骨折未解剖复位、内固定不坚强、过早完全负重以及拉力螺钉位置不良。
Failure is more common with the screw put on the Bellows Seal Valves threaded stem wear, so that the valve can not close.
比较常见的故障是阀杆与螺套上的丝扣磨损，陶瓷阀门使阀门无法关闭。
Objectives To analyze the reason and strategy for failure of posterior pedicle screw internal fixation on serious thoracolumbar fractures.
目的探讨后路椎弓根螺钉内固定治疗严重胸腰椎骨折失败的原因及对策。
The screw joint of the reducer bonnet and body was concluded as the failure position because of its small contact height.
经分析得出：事故原因是减压阀阀座和阀盖的连接螺纹接触高度过小，强度不足，导致螺纹连接失效。
When screw pump works, the stem can not only influence by the force of tension stress but also the shearing stress which makes it to be failure easily if the design is not good or monitor is poor.
螺杆泵工作时，杆柱不但受到拉应力，而且受到剪应力。如果设计不当或使用中监测不力，螺杆泵很容易发生故障。
Failure relative factors were regarded to age, type of fracture, quality of bone, operation technique, quality of plate and screw, and choice of operative indication.
患者年龄、骨折类型、骨的质量、手术技术、内固定材料强度、手术适应证的选择是失败的相关原因。
This paper has analysed fixed screw of consolidate steel plate failure. Result that screw is fatigued failure. The time of steel plate taken out are discussed.
本文对医用加压钉板固定螺钉断裂进行了失效分析，分析结果表明螺钉为疲劳断裂，并提出了恰当的取出加压钉板的时间。
This locking of screw to plate makes the fixation construct more resistant to failure from sequential screw loosening and pullout.
螺钉锁定在钢板上使得固定重建对随后可能发生的螺钉松动和脱出的抵抗能力更强。
Methods Retrospective analysis of thoracolumbar pedicle screw fixation failure in 21 cases between December 2006 and December 2010 was carried out in this study.
方法回顾性分析2006年12月- 2010年12月行胸腰椎经椎弓根钉内固定治疗失败的21例患者临床资料。
Methods Retrospective analysis of thoracolumbar pedicle screw fixation failure in 21 cases between December 2006 and December 2010 was carried out in this study.
方法回顾性分析2006年12月- 2010年12月行胸腰椎经椎弓根钉内固定治疗失败的21例患者临床资料。
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