Nele U, Maffulli N, Pintore E
Department of Orthopaedics, Ospedale Fatebene Fratelli, Napoli, Italy.
Clin Orthop Relat Res. 1994 Nov(308):68-72.
The mechanical and biomechanical characteristics of an external fixation system determine the biologic environment of the treated site. Traditionally, the Ilizarov system uses steel rings, which are heavy and can interfere with radiographic imaging. Biomechanical comparison of the traditional Ilizarov steel rings with rings made of oriented carbon fibers shows that the mechanical characteristics of the carbon fiber rings are comparable with those exhibited by traditional steel rings, being elastically rigid over the whole range of loads applied (147 N, 441 N, 735 N, 1029 N, 1110.34 N, 1192.7 N, 1274 N, 1355.3 N, 1437.7 N, 1519 N, and 1600.4 N). The plastic deformation exhibited by steel rings at high loads thus is avoided. In a clinical situation, such a deformation in response to loading would alter the biomechanics of the fracture site, possibly affecting the healing process.
外固定系统的机械和生物力学特性决定了治疗部位的生物环境。传统上，伊里扎洛夫系统使用钢环，其重量较大且会干扰放射成像。将传统的伊里扎洛夫钢环与定向碳纤维制成的环进行生物力学比较表明，碳纤维环的机械特性与传统钢环相当，在施加的整个载荷范围内（147 N、441 N、735 N、1029 N、1110.34 N、1192.7 N、1274 N、1355.3 N、1437.7 N、1519 N和1600.4 N）都具有弹性刚度。这样就避免了钢环在高载荷下出现的塑性变形。在临床情况下，这种因加载而产生的变形会改变骨折部位的生物力学，可能影响愈合过程。
