Acetabular cup geometry and bone-implant interference have more influence on initial periprosthetic joint space than joint loading and surgical cup insertion

Journal of Biomechanical Engineering
Kevin L OngD L Bartel

Abstract

Environmental variations in patient-dependent and surgical factors were modeled using robust optimization with a finite element acetabular cup-pelvis model. A previously developed statistical optimization scheme was used to: (1) determine the cup geometry and the optimal cup-bone interference that maximized bone-implant contact areas and minimized changes in the gap volume between the implant and bone surface during gait loading and unloading; and (2) determine the relative contributions of design, patient-dependent, and surgical factors to variations in bone-implant contact areas and a change in gap volume. The statistical analyses indicated that the design variables, namely the equatorial diameter and eccentricity, explained most of the variations in the performance measures. Further, the hemispherical designs performed better than the nonhemispherical designs. The 58 mm hemispherical cup, with 2 mm diametral interferences, minimized the change in gap volume and attained 82% and 81% of the maximum predicted total and rim contact areas, respectively. The equatorial diameter and eccentricity, not the patient-dependent and surgical factors, explained most of the variations in the performance measures. Perfect surface apposition ...Continue Reading

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Citations

Jun 6, 2008·Journal of Biomechanical Engineering·Kevin L OngDonald L Bartel
May 13, 2010·Journal of Biomechanical Engineering·Sara BarretoJacinto Monteiro
Dec 21, 2012·International Journal for Numerical Methods in Biomedical Engineering·Mark TaylorFrancis Galloway
Aug 5, 2017·Computer Methods in Biomechanics and Biomedical Engineering·Vu-Hieu NguyenGuillaume Haiat
Jun 3, 2009·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Kevin L OngSteven M Kurtz
May 3, 2013·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Rajesh GhoshSanjay Gupta
Jul 2, 2015·Biomechanics and Modeling in Mechanobiology·Kaushik Mukherjee, Sanjay Gupta
Aug 12, 2008·The Journal of the American Academy of Orthopaedic Surgeons·Thomas D BrownUNKNOWN Implant Wear Symposium 2007 Engineering Work Group
Mar 22, 2013·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Rajesh GhoshMartin Browne
Aug 6, 2016·Medical & Biological Engineering & Computing·Adrien MichelGuillaume Haiat
Aug 1, 2016·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Kaushik Mukherjee, Sanjay Gupta
Dec 22, 2019·Materials·Nicholas A BeckmannSebastian Jaeger
Oct 7, 2010·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·P J Laz, M Browne

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