Windhagen H, Bail H, Schmeling A, Kolbeck S, Weiler A, Raschke M
Department of Trauma Surgery, Virchow Klinikum, Humboldt-University, Berlin, Germany.
J Biomech. 1999 Aug;32(8):857-60. doi: 10.1016/s0021-9290(99)00064-0.
We present a newly developed torsional stiffness measurement device with the potential to quantitatively assess the in vivo torsional stiffness of bone regenerate during distraction osteogenesis. We describe the form and function of this device and its application in a model of regenerate consolidation. The device was able to produce data to assess stiffness of the regenerate with an accuracy between +/- 3 and +/- 9% for material stiffness ranging between 0.1 and 2.4 Nm/o and with a precision of +/- 3.6%. This method provides advantages over similar methods of bone fracture healing assessment with guaranteed maintenance of bone axis, minimized risk of bone misalignment during the bone healing process and a close relation to the functional loading pattern in torsion of bones such as tibia and femora.
我们展示了一种新开发的扭转刚度测量装置，它有潜力在牵张成骨过程中定量评估骨再生组织的体内扭转刚度。我们描述了该装置的形式和功能及其在再生组织巩固模型中的应用。对于材料刚度在0.1至2.4 Nm/°之间的情况，该装置能够产生数据来评估再生组织的刚度，其准确度在±3%至±9%之间，精度为±3.6%。该方法相对于类似的骨折愈合评估方法具有优势，能确保骨轴的维持，在骨愈合过程中使骨错位的风险最小化，并且与胫骨和股骨等骨骼扭转时的功能负荷模式密切相关。
