骨折弹性固定研究进展△

Research progress in elastic osteosynthesis for fracture

摘要:

骨折固定经历了AO（association for osteosynthesis, AO） 机械力学接骨术，发展到BO（biological osteosynthesis, BO）生物学接骨术，再到弹性接骨术（elastic osteosynthesis, EO），每一个阶段的进步都是在前一阶段基础上发展和创新。EO 有较小的应力遮挡效应，使骨折区域存在可控应力，产生应变效应，加速骨折愈合。然而EO 除了考虑可控应力外，还要考虑骨折的相对稳定，二者之间的平衡决定骨折成功地愈合。骨折块间应变（interfragmentary strain, IFS） 作为不同置入物固定骨折稳定性的力学指标，IFS 不同可以出现不同的愈合情况。本文对EO 的理念与研究进展进行综述。

Abstract:

The fractures fixation has been evolved from rigid mechanical internal fixation (association for osteosynthesis, AO) to biolog-ical osteosynthesis (BO), and further to elastic osteosynthesis (EO). In history of internal fixation, the development and innovation at eachstage was based on the outcomes of previous period. The EO theory believes that the minimized stress-shielding might produce a controlla-ble stress in fractures area due to strain effect, which is beneficial to fractures healing. However, relative stability of fixation should be con-sidered except controlled stress in EO, and a balance between flexibility and stiffness of the EO is essential for successful fractures healing.The interfragmentary strain (IFS) is a simple mechanical parameter that could be used to describe the fractures stability, and leads to vari-ous bone healing outcomes. In this paper, a review involving a large number of literatures was presented on EO.