標題: Biomechanical investigation into the structural design of porous additive manufactured cages using numerical and experimental approaches
作者: Tsai, Pei-I
Hsu, Ching-Chi
Chen, San-Yuan
Wu, Tsung-Han
Huang, Chih-Chieh
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Additive manufactured cage;Finite element analysis;Intersegmental rotation;Cage stress;Disc stress
公開日期: 1-Sep-2016
摘要: Traditional solid cages have been widely used in posterior lumbar interbody fusion (PLIF) surgery. However, solid cages significantly affect the loading mechanism of the human spine due to their extremely high structural stiffness. Previous studies proposed and investigated porous additive manufactured (AM) cages; however, their biomechanical performances were analyzed using oversimplified bone-implant numerical models. Thus, the aim of this study was to investigate the outer shape and inner porous structure of the AM cages. The outer shape of the AM cages was discovered using a simulation based genetic algorithm; their inner porous structure was subsequently analyzed parametrically using T10-S1 multilevel spine models. Finally, six types of the AM cages, which were manufactured using selective laser melting, were tested to validate the numerical outcomes. The subsidence resistance of the optimum design was superior to the conventional cage designs. A porous AM cage with a pillar diameter of 0.4 mm, a pillar angle of 40 degrees, and a porosity of between 69% and 80% revealed better biomechanical performances. Both the numerical and experimental outcomes can help surgeons to understand the biomechanics of PLIF surgery combined with the use of AM cages. (C) 2016 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.compbiomed.2016.06.016
http://hdl.handle.net/11536/134261
ISSN: 0010-4825
DOI: 10.1016/j.compbiomed.2016.06.016
期刊: COMPUTERS IN BIOLOGY AND MEDICINE
Volume: 76
起始頁: 14
結束頁: 23
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