脊椎固定用Titanium Fiber Mesh Blockの力学的特性, 星島一夫, 北岡謙一, 山本博司 日本臨床バイオメカニクス学会誌 19 : 83-86, 1998. Abstract;Mechanical properties of titanium fiber mesh(TFM) blocks for spinal fusion with three different porosities were determined by compression testing. TFM was made from single pure titanium wire with 250.MU.m in diameter. The wire was woven into weft-knit mesh, then pressure molding and vacuum sintering was applied. Final porosities of TFM were controlled to 50, 60 and 70%. Compressive loads up to 3500N were applied to 15*15*15mm cube TFM blocks. Stress-strain curves revealed different modulus and deformities in three porosity of TFM. However, failure loads of each porosity implant were similar due to strain-hardening. From the relationship of implant density and modulus, 70% TFM showed different character with 50 and 60% implant. As an optimum implant for spinal fusion with enough strength to in vivo spine load and modulus close to cancellous bone, we conclude 60% TFM might have superior properties, in contrast 70% implant should not use for lumbar spinal fusion. (author abst.)
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