Highly Cross-Linked vs Conventional Polyethylene: No Differences in Rim Notching From Micromotion on Retrieved Acetabular Liners

Previous literature suggested highly cross-linked acetabular liners demonstrated notching patterns that may be a point of crack origin and rim failure. We examined (1) whether notching patterns and rim cracks existed and demonstrated similar morphological properties in retrieved highly cross-linked...

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Bibliographic Details
Published in:The Journal of arthroplasty Vol. 27; no. 9; pp. 1616 - 1621.e1
Main Authors: Paterson, Nicholas R., Teeter, Matthew G., MacDonald, Steven J., McCalden, Richard W., Howard, James L., Naudie, Douglas D.R.
Format: Journal Article
Language:English
Published: United States Elsevier Inc 01.10.2012
Subjects:
Acetabulum - surgery
Arthroplasty, Replacement, Hip - instrumentation
Cross-Linking Reagents
Device Removal
highly cross-linked polyethylene
Hip Prosthesis
Humans
Orthopedics
Polyethylenes - chemistry
Prosthesis Design
Prosthesis Failure
retrieval study
rim crack
Surface Properties
total hip arthroplasty
X-Ray Microtomography
total hip arthroplasty
highly cross-linked polyethylene
retrieval study
rim crack
ISSN:0883-5403, 1532-8406, 1532-8406
Online Access:Get full text
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Summary:Previous literature suggested highly cross-linked acetabular liners demonstrated notching patterns that may be a point of crack origin and rim failure. We examined (1) whether notching patterns and rim cracks existed and demonstrated similar morphological properties in retrieved highly cross-linked and non–cross-linked liners and (2) whether the dimensions of these notches correlated with their duration of implantation. We retrieved a series of 14 identical liners out to an average of 2.03 years. Liners were microscopically examined and then scanned using microcomputed tomography. All liners demonstrated identical notching patterns. Microcomputed tomographic scans demonstrated no signs of crack initiation or rim failure but were able to accurately quantify the notch dimensions. The notching patterns were likely caused by liner-cup micromotion and are better characterized as creep deformation because they did not progress markedly over longer durations of implantation.
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ISSN:0883-5403
1532-8406
1532-8406
DOI:10.1016/j.arth.2012.03.034