Journal article
Biomechanical Modeling of Acetabular Component Polyethylene Stresses, Fracture Risk, and Wear Rate following Press-Fit Implantation
Journal of orthopaedic research, v 27(11), pp 1467-1472
01 Nov 2009
PMID: 19489047
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Press-fit implantation may result in acetabular component deformation between the ischial-ilial columns ("pinching"). The biomechanical and clinical consequences of liner pinching due to press-fit implantation have not been well studied. We compared the effects of pinching on the polyethylene fracture risk, potential wear rate, and stresses for two different thickness liners using computational methods. Line-to-line ("no pinch") reaming and 2 mm underreaming press fit ("pinch") conditions were examined for Trident cups with X3 (TM) polyethylene liner wall thicknesses of 5.9 mm (36E) and 3.8 mm (40E). Press-fit cup deformations were measured from a foam block configuration. A hybrid material model, calibrated to experimentally determined stress-strain behavior of sequentially annealed polyethylene, was applied to the computational model. Molecular chain stretch did not exceed the fracture threshold in any cases. Nominal shell pinch of 0.28 mm was estimated to increase the volumetric wear rate by 70% for both cups and peak contact stresses by 140 and 170% for the 5.9 and 3.8 mm-thick liners, respectively. Although pinching increases liner stresses, polyethylene fracture is highly unlikely, and the volumetric wear rates are likely to below compared to conventional polyethylene. (C) 2009 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop lies 27:1467-1472, 2009
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Details
- Title
- Biomechanical Modeling of Acetabular Component Polyethylene Stresses, Fracture Risk, and Wear Rate following Press-Fit Implantation
- Creators
- Kevin L. Ong - Exponent (United States)Steve Rundell - Drexel UniversityImants Liepins - StrykerRyan Laurent - StrykerDavid Markel - Providence HospitalSteven M. Kurtz - Exponent (United States)
- Publication Details
- Journal of orthopaedic research, v 27(11), pp 1467-1472
- Publisher
- Wiley
- Number of pages
- 6
- Grant note
- Stryker Orthopaedics, Mahwah, NJ
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000271310700011
- Scopus ID
- 2-s2.0-70350228619
- Other Identifier
- 991019167540304721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Orthopedics