Computational wear assessment of hard on hard hip implants subject to physically demanding tasks

Medical & Biological Engineering & Computing
R NithyaprakashM S Uddin

Abstract

Hip implants subject to gait loading due to occupational activities are potentially prone to failures such as osteolysis and aseptic loosening, causing painful revision surgeries. Highly risky gait activities such as carrying a load, stairs up or down and ladder up or down may cause excessive loading at the hip joint, resulting in generation of wear and related debris. Estimation of wear under the above gait activities is thus crucial to design and develop a new and improved implant component. With this motivation, this paper presents an assessment of wear generation of PCD-on-PCD (poly crystalline diamond) hip implants using finite element (FE) analysis. Three-dimensional (3D) FE model of hip implant along with peak gait and peak flexion angle for each activity was used to estimate wear of PCD for 10 million cycles. The maximum and minimum initial contact pressures of 206.19 MPa and 151.89 MPa were obtained for carrying load of 40 kg and sitting down or getting up activity. The simulation results obtained from finite element model also revealed that the maximum linear wear of 0.585 μm occurred for the patients frequently involved in sitting down or getting up gait activity and maximum volumetric wear of 0.025 mm3 for ladder up...Continue Reading

References

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Citations

Aug 31, 2018·International Journal for Numerical Methods in Biomedical Engineering·Mohammad Sharif Uddin, Gi Wing Constance Chan
Oct 5, 2018·Bio-medical Materials and Engineering·M KalayarasanK Adithan
Mar 3, 2020·Computer Methods in Biomechanics and Biomedical Engineering·S ShankarAlokesh Pramanik

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