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Finite element study of functionally graded porous femoral stems incorporating body-centered cubic structure.
Alkhatib, Sami E; Tarlochan, Faris; Mehboob, Hassan; Singh, Ramesh; Kadirgama, Kumaran; Harun, Wan Sharuzi Bin Wan.
Afiliación
  • Alkhatib SE; Mechanical and Industrial Engineering Department, College of Engineering, Qatar University, Doha, Qatar.
  • Tarlochan F; Mechanical and Industrial Engineering Department, College of Engineering, Qatar University, Doha, Qatar.
  • Mehboob H; Mechanical and Industrial Engineering Department, College of Engineering, Qatar University, Doha, Qatar.
  • Singh R; Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia.
  • Kadirgama K; Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Malaysia.
  • Harun WSBW; Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Malaysia.
Artif Organs ; 43(7): E152-E164, 2019 Jul.
Article en En | MEDLINE | ID: mdl-30805945
The mismatch between stiffness of the femoral dense stem and host bone causes complications to patients, such as aseptic loosening and bone resorption. Three-dimensional finite-element models of homogeneous porous (HGP) and functionally graded porous (FGP) stems incorporating body-centered cubic (BCC) structures are proposed in this article as an alternative to the dense stems. The relationship between the porosity and strut thickness of the BCC structure was developed to construct the finite-element models. Three levels of porosities (20%, 50%, and 80%) were modeled in HGP and FGP stems. The porosity of the stems was decreased distally according to the sigmoid function (n = 0.1, n = 1 and n = 10) with 3 grading exponents. The results showed that FGP stems transferred 120%-170% higher stresses to the femur (Gruen zone 7) as compared to the solid stem. Conversely, the stresses in HGP and FGP stems were 12%-34% lower than the dense stem. The highest micromotions (105-147 µm) were observed for stems of 80% overall porosity, and the lowest (42-46 µm) was for stems of 20% overall porosity. Finally, FGP stems with a grading exponent of n = 10 resulted in an 11%-28% reduction in micromotions.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diseño Asistido por Computadora / Fémur / Prótesis de Cadera Límite: Humans Idioma: En Revista: Artif Organs Año: 2019 Tipo del documento: Article País de afiliación: Qatar Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Diseño Asistido por Computadora / Fémur / Prótesis de Cadera Límite: Humans Idioma: En Revista: Artif Organs Año: 2019 Tipo del documento: Article País de afiliación: Qatar Pais de publicación: Estados Unidos