Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Critical Reviews™ in Biomedical Engineering
SJR: 0.243 SNIP: 0.376 CiteScore™: 0.79

ISSN Print: 0278-940X
ISSN Online: 1943-619X

Critical Reviews™ in Biomedical Engineering

DOI: 10.1615/CritRevBiomedEng.v28.i12.30
pages 7-10

Mechanical Stability of Polyethylene Liners Cemented Into Acetabular Shells

Christopher V. Bensen
Department of Orthopaedic Surgery, Medical University of South Carolina, Charleston, SC
H. Del Schutte, Jr.
Department of Orthopaedic Surgery, Medical University of South Carolina, Charleston, SC
Kevin D. Weaver
Smith & Nephew, Inc., Memphis, TN

ABSTRACT

Revision of well-fixed, metal-backed acetabular components for dislocation or polyethylene failure requires consideration of removing the entire construct or replacing the polyethylene liner only. For non-modular or first-generation modular components with poor locking mechanisms, one option is to cement undersized liners into well-fixed shells. The purpose of this study was to measure the stability of undersized liners cemented into metal acetabular shells and compare the results with those of modular components. Hooded polyethylene liners measuring 28 ґ 50 mm and 28 ґ 56 mm were cemented into 66-mm acetabular shells (Smith & Nephew, Inc., Memphis, TN) with Simplex-P polymethylmethacrylate cement (Howmedica, Inc., Rutherford, NJ) giving 4- and 2-mm cement mantles, respectively. The force required to lever-out the liners from the shells was measured using the protocol described by Tradonsky et al. Assemblies with 4-mm mantles dissociated at an average of 322 ± 47 in-lbf.; however, the assemblies with 2-mm mantles would not dissociate before the polyethylene yielded at torques as high as 600 in-lbf. These results compare favorably with the previously reported range (43 to 684 in-lbf) for modular acetabular components. These results suggest that undersized polyethylene liners can be cemented into well-fixed acetabular shells and expected to be stable.


Articles with similar content:

A New Design for Maximum Conformity of Total Knee Prosthesis to Femur and Tibia
Journal of Long-Term Effects of Medical Implants, Vol.26, 2016, issue 4
Ismail Hakki Korkmaz, Ömer S. Yildirim, İrfan Kaymaz
Long-Term Results of a Cementless Knee Prosthesis with a Metal-Backed Patellar Component: Clinical and Radiological Follow-Up with Histology from Retrieved Components
Journal of Long-Term Effects of Medical Implants, Vol.13, 2003, issue 4
Mikael Sundfeldt, Tomas Albrektsson, Lars V Carlsson, Carina B. Johansson, Lars Regner
Accuracy of Pedicle Screw Placement Using Intraoperative Neurophysiological Monitoring and Computed Tomography
Journal of Long-Term Effects of Medical Implants, Vol.19, 2009, issue 1
Spyridon G. Pneumaticos, Damianos E. Sakas, Panayiotis J. Papagelopoulos, Konstantinos Papadopoulos
Large Diameter Total Hip Replacement for Acute Displaced Femoral Neck Fracture
Journal of Long-Term Effects of Medical Implants, Vol.29, 2019, issue 1
James Pritchett
Deformation and Recovery of Thin Metal-Backed, Two-Piece Polyethylene Acetabular Resurfacing Components
Journal of Long-Term Effects of Medical Implants, Vol.29, 2019, issue 1
James Pritchett