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LI JIAN, CHEN DIANSHENG, LUAN HUIQIN, YAN WEI, FAN YUBO. MECHANICAL PERFORMANCE OF POROUS IMPLANT WITH DIFFERENT UNIT CELLS. J MECH MED BIOL 2017. [DOI: 10.1142/s0219519417501019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study investigates the effect of different unit cells on the mechanical performance of porous implant. Three shapes of unit cells (Diamond 30(DO30), Octet truss 30(OT30), and Rhombic dodecahedron 30(RD30)) were selected, which have the same relative density. Corresponding models of single pore (SP), repeating pores (RP) and porous implant (PI) were created. Using finite element methodology, mechanical performances of three classes of models under the conditions of pressure and torsion were simulated based on the same static load (SP: 50[Formula: see text]N, 0.125[Formula: see text]N[Formula: see text]m; RP: 200[Formula: see text]N, 0.5[Formula: see text]N[Formula: see text]m; PI: 200[Formula: see text]N, 0.5[Formula: see text]N[Formula: see text]m), respectively. Results demonstrated that RP showed consistent mechanical performances with SP: OT30 displayed the lowest stresses, displacements, and strains under the conditions of pressure and torsion, and conversely DO30 always resulted in the highest magnitudes. For the case of PI, mechanical performances were different from SP and RP: implant with shape of RD30 resulted in the lowest stress (275.2[Formula: see text]MPa) under the condition of pressure, but displacement (2.236e[Formula: see text]002[Formula: see text]mm) and strain (3.050e[Formula: see text]003) of OT30 were the largest; under the condition of torsion, stress sequence was same as SP and RP, but DO30 provided the highest strain (2.437e[Formula: see text]003), RD30 displayed the largest displacement (1.508e[Formula: see text]002[Formula: see text]mm). Unit cell influences mechanical performance of porous implant directly, and the implant outline and incomplete structure may also affect it. It could not select pore simply by the right type of unit cell, and surface area is an important parameter as well as pore size.
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Affiliation(s)
- JIAN LI
- Robotic Institute, Beihang University, Xueyuan Road Beijing 100191, P. R. China
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability & Key Laboratory of Rehabilitation, Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids, Ronghua Road, Beijing 100176, P. R. China
| | - DIANSHENG CHEN
- Robotic Institute, Beihang University, Xueyuan Road Beijing 100191, P. R. China
| | - HUIQIN LUAN
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability & Key Laboratory of Rehabilitation, Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids, Ronghua Road, Beijing 100176, P. R. China
| | - WEI YAN
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability & Key Laboratory of Rehabilitation, Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids, Ronghua Road, Beijing 100176, P. R. China
| | - YUBO FAN
- Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age and Disability & Key Laboratory of Rehabilitation, Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids, Ronghua Road, Beijing 100176, P. R. China
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Xueyuan Road, Beijing 100191, P. R. China
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