Norwegian Orthopaedic Implant Research Unit, NKSOI, Orthopaedic Department, Bevegelsessenteret, St. Olavs Hospital, Trondheim University Hospital, 7006 Trondheim, Norway.
J Biomech. 2010 Aug 26;43(12):2327-31. doi: 10.1016/j.jbiomech.2010.04.029. Epub 2010 May 15.
Stability of an Ilizarov frame highly depends on maintenance of adequate tension in the wires. Wire tension should be measured accurately in experimental laboratory studies when new types of wire fixators are tested. In this study, 20 wires were tested using two different wire fixators. The wires were sequentially tensioned from 0 to 1275 N in 50 N intervals. For each tension value, corresponding vibration frequency was recorded. We then described the relationship between wire tension and wire vibration frequency in an empirical equation (R(2)=99.8). Wire vibration frequency can also be described theoretically by the Euler-Bernoulli equation for a thin beam. Theoretical frequencies were calculated and compared with corresponding experimental frequencies. A close agreement was found (95% limits of agreement, +/-3.2 Hz). This empirical equation represents a simple tool, applicable when investigating the effect of new wire fixators, pre-tensioning and frame constructions on wire tension.
伊利扎洛夫外固定架的稳定性在很大程度上取决于钢丝的张力维持。当测试新型钢丝固定器时，应在实验室内进行精确测量钢丝张力。本研究使用两种不同的钢丝固定器对 20 根钢丝进行了测试。这些钢丝以 50N 的间隔从 0 逐渐增加至 1275N。对于每个张力值，都记录了相应的振动频率。然后，我们在经验公式中描述了钢丝张力和钢丝振动频率之间的关系（R²=99.8）。钢丝的振动频率也可以通过欧拉-伯努利方程来描述。理论频率与对应的实验频率进行了比较，发现两者非常吻合（95%一致性界限，+/-3.2Hz）。该经验公式是一种简单的工具，可用于研究新型钢丝固定器、预紧和框架结构对钢丝张力的影响。
