| Spectral characterization of squeaking in ceramic-on-ceramic total hip arthroplasty: Comparison of in vitro and in vivo values. | |
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MedLine Citation:
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PMID: 21834123 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Squeaking is a cause for concern in total hip arthroplasty (THA). However, the definition of this sound remains vague. Our goals were to characterize spectrally the squeaking in vitro under lubricated conditions and to compare the in vitro frequencies to in vivo frequencies. Four patients, who presented with a squeaking after ceramic-on-ceramic THA were investigated. In addition, 3 alumina ceramic 32 mm diameter components were tested in vitro under edge loading conditions using a friction simulator. Tests were conducted under lubricated conditions without and with the addition of a third body alumina particle. In vitro, no squeaking occurred under edge loading conditions. However, with the addition of a third body particle in the contact region, squeaking was obtained; the dominant frequency was 2.6 kHz. In vivo, the main recorded sound frequencies were: 2.3, 2.24, and 2.46 kHz for squeakers during walking and 1.45 kHz for a squeaker rising from a bent position. The in vivo recordings had a dominant frequency similar to, but slightly lower than, the in vitro values. Two types of squeaking were found in vivo and characterized spectrally. The rising squeaker had intermittent squeaking corresponding to a lower fundamental frequency compared to the walking squeakers. This finding suggests two different mechanism of squeaking. © 2011 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res. |
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Authors:
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Elhadi Sariali; Zhongmin Jin; Todd Stewart; John Fisher |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-8-10 |
Journal Detail:
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Title: Journal of orthopaedic research : official publication of the Orthopaedic Research Society Volume: - ISSN: 1554-527X ISO Abbreviation: - Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-8-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8404726 Medline TA: J Orthop Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Orthopaedic Research Society. |
Affiliation:
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IMBE Leeds University, Leeds, United Kingdom; Orthopaedic Surgery Department, Hopital Pitié Salpétrière, 47-83 Boulevard de l'Hopital, 75013 Paris, France. hedisari@yahoo.fr. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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