A novel approach to the estimation and application of the wear coefficient of metal-on-metal hip implants |
| |
| Affiliation: | 1. Instituto de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna, 4860 Santiago, Chile;2. Centro de Investigación en Nanotecnología y Materiales Avanzados “CIEN-UC”, Av. Vicuña Mackenna, 4860 Santiago, Chile;3. Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Blanco Encalada, 2008 Santiago, Chile;1. Department of Orthopedic and Trauma Surgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran;2. Department of Orthopedic and Trauma Surgery, Children''s Hospital Medical Center, Tehran University of Medical Sciences, Tehran, Iran;3. Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran |
| |
| Abstract: | A novel approach is proposed to estimate and model the wear of metal-on-metal hip implants. The approach is based on two distinct wear coefficients for the head and cup, derived from separate measurements on the two components. This is in contrast to the usual assumption that a single wear coefficient (k) is valid for both bodies. Actually, the head and cup do not wear equally; thus, assuming equal wear leads to predictive errors. Additionally, in most papers, k is chosen considering only implant materials while neglecting geometry and testing conditions. It is suggested that experimental procedures designed for hip implants should measure the head and cup volume losses separately and that wear maps should be provided to validate numerical models. |
| |
| Keywords: | Wear coefficient Archard wear law Wear predictive model Hip replacement |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
