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KMID : 1137820200410010014
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의공학회지
2020 Volume.41 No. 1 p.14 ~ p.21
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Development and Mechanical Performance Evaluation of Lumbar Porous Interbody Fusion Cage
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Ahn Yoon-Ho
Yoo Kyeong-Joo
Park Kwang-Min
Cha Eun-Jong
Kim Kyung-Ah
Ahn Kyoung-Gee
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Abstract
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Recently, porous additive manufactured(AM) cages have been introduced to provide more desirable stiffness and may be beneficial to bone ingrowth. They are designed to attempt to reduce the subsidence problem of traditional titanium cage and to get osseointegrative property that PEEK doesn’t have. This study was performed to evaluate the mechanical performance of newly developed lumbar porous AM cages. Three types of mechanical tests were performed in accordance with the ASTM standards: Static compression, compression-shear, and subsidence tests. The porous AM cages with 60% porosity showed similar device stiffness and strength as the various products submitted to FDA 510(k), and their wider contact area improved the subsidence test results by about 50%. In conclusion, the porous AM cages developed in this study were considered mechanically safe and could be an alternative to solid PEEK cages.
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KEYWORD
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Interbody fusion cage, Additive manufacturing, Lattice structure, Structural stiffness, Mechanical performance test
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