内固定下机械振动诱发骨折间微动的测量及其意义

MEASUREMENT OF INTERFRAGENTRY MICROMOTION INDUCED BY MECHANICAL VIBRATION UNDER INTERNAL FIXATIONS AND ITS CLINICAL RELEVANCE

在7根防腐成年尸湿股骨上粘贴应变加速度计检测在钢板及髓内针固定下机械振动对截骨骨折间微动的影响。结果表明，本测量方法的精度可以满足实验要求，证实在髓内针固定下机械振动可诱发骨折间微动，且微动量与振动频率呈负相关。因此，若采用机械振动来刺激骨折愈合，应注意最适振动频率的选择。

The interfragmentary micromotions in seven osteotomized cadaveric femurs were measured by using of strain accelerometers to study the effect of mechanical vibration on them under plate fixation or intramedullary nailing. The results showed that this measurement method with accelerometers was considerably accurate. It was confirmed that mechanical vibration could induce interfragmentary micromotion under nailing, but not under plate fixation. The negative curvilinear coorelation was found between vibration frequency and micromotion. Therefore, the choice of suitable vibration frequency deserves further researches if mechanical vibration is considered to be used in clinical practive.