Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (한국CDE학회)
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Comparison of Biomechanical Stability of Custom-made Hip Implants using Finite Element Analysis

스템 길이에 따른 환자맞춤 인공고관절의 역학적 안정성 비교

  • Jun, Yongtae (Department of Mechanical Engineering, Sejong University)
  • 전용태 (세종대학교 기계공학과)
  • Received : 2016.06.20
  • Accepted : 2016.08.18
  • Published : 2016.12.01
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Abstract

Designing a morphologically well-fitted hip implant to a patient anatomy is desirable to improve surgical outcomes since a commercial ready-made hip implant may not well conform to the patient joint. In this study, biomechanical stability of patient-specific hip implants with two different stem lengths was compared and discussed using a 3D finite element analysis (FEA). The FEA results in this study showed that an increase in stem length brings about more the peaked von-Mises stress (PVMS) in the prosthesis and less in the femur. However the decrease in von-Mises stress in the femur causes stress shielding phenomenon that usually leads to considerable bone resorption. Although, in biomechanical stability point of view, this work recommends the use of smaller stems, the length of stem must be determined by considering both the von-Mises stress and the stress-shielding phenomenon.

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References

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