高強度不銹鋼接骨板的輕量化設(shè)計及生物力學(xué)研究：厚度減薄的影響

高強度不銹鋼接骨板的輕量化設(shè)計及生物力學(xué)研究：厚度減薄的影響Study on lightweight design and biomechanical property of high strength stainless steel plate: effect of thickness thinning

采用有限元方法模擬研究高氮無鎳不銹鋼接骨板厚度減薄對其力學(xué)行為的影響規(guī)律。結(jié)果表明，接骨板厚度減薄18%以內(nèi)，其抗彎能力、抗拉能力和抗壓能力均優(yōu)于傳統(tǒng)尺寸的316L不銹鋼接骨板。通過12周動物骨折模型研究了輕量化高氮無鎳不銹鋼骨板對骨折愈合后的生物力學(xué)的影響。結(jié)果表明，厚度減薄約14%的高氮無鎳不銹鋼接骨板固定兔子骨折股骨更有利于骨折的愈合和恢復(fù)。

High nitrogen nickel free stainless steel (HNNFSS) has begun to be used in clinic, which possesses excellent mechanical properties, corrosion resistance and biocompatibility. Especially its strength is two times more than that of the conventional 316L stainless steel, but this advantage is not fully used in optimization of both the structure and the size of the implant devices. In this work, the effect of thickness change of HNNFSS bone plate on the biomechanical behavior of bone plate was studied by means of finite element analysis, The result showed that the resistances to bending, tension and compression of HNNFSS plate are all better than those of 316L plate when its thickness is thinned less than 18%. The internal fixation of the lightweight HNNFSS plate was also studied by a 12 weeks rabbit femur fracture model and the result showed that the HNNFSS plate with about 14% thickness thinning could promote the healing and reconstruction of bone fracture of rabbit femur in comparison with 316L plate.

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