Numerical modeling of the damaged cement orthopedic in three variants of total hip prostheses

Cherfi Mohamed, Zagane Mohammed El Sallah, Moulgada Abdelmadjid, Ait Kaci Djafar, Benouis Ali, Zahi Rachid and Sahli Abderahmen

Abstract

Numerical modeling using the finite element method (FEM) offers crucial insights into the mechanical behavior of prostheses, including stress and strain distribution, load transfer, and stress intensity factors. Analyzing cracking in PMMA surgical cement (polymethylmethacrylate) for total hip prostheses (THP) is essential for understanding the loosening phenomenon, as the rupture of orthopedic cement is a primary cause. By understanding various failure mechanisms, significant advancements in cemented total prostheses can be achieved. This study performed a numerical analysis using a 3D FEM model to evaluate stress levels in different THP models, aiming to model damage in the orthopedic cement used in total hip arthroplasty. Utilizing ABAQUS software, FEM, and XFEM, the damage in three types of THPs-Charnley (CMK3), Osteal (BM3), and THOMPSON was modeled under stumbling loading conditions. XFEM allowed for the consideration of crack propagation between the cement and bone, while the GEARING criterion employed a user-defined field subroutine to model damage parameters. The study's findings can contribute to improving implant fixation techniques and preventing postoperative complications in orthopedic surgery.

Key Words

cement; damage; finite element method; GEARING; total hip prosthesis; X-FEM

Address

Cherfi Mohamed, Ait Kaci Djafar, Sahli Abderahmen: Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, City Ben Mhidi, Sidi Bel Abbes 22000, Algeria; Department of Mechanical Engineering, Laboratory Mechanics Physics of Materials (LMPM), University of Sidi Bel Abbes, Algeria Zagane Mohammed El Sallah, Moulgada Abdelmadjid: Department of Mechanical Engineering, University of Ibn Khaldoun, Tiaret, BP 78 Zaaroura Street, Tiaret 14000, Algeria; Department of Mechanical Engineering, Laboratory Mechanics Physics of Materials (LMPM), University of Sidi Bel Abbes, Algeria Benouis Ali: Department of Mechanical Engineering, Laboratory Mechanics Physics of Materials (LMPM), University of Sidi Bel Abbes, Algeria; Faculty of Technology, University of Moulay Tahar, Saida BP138 Saida 20000, Algeria Zahi Rachid: Department of Mechanical Engineering, University of Relizane.BP48000, Algeria

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