Abstract：
BACKGROUND:Wear of polyethylene tibial inserts can decrease the longevity of total knee arthroplasty. Wear is currently assessed using laboratory methods that may not permit backside wear measurements or do not quantify surface deviation. QUESTIONS/PURPOSES:We developed and validated a technique to quantify polyethylene wear in tibial inserts using microcomputed tomography (micro-CT), a nondestructive high-resolution imaging technique that provides detailed images of surface geometry in addition to volumetric measurements. METHODS:Six unworn and six wear-simulated polyethylene tibial inserts were evaluated. Each insert was scanned three times using micro-CT at a resolution of 50 μm. The insert surface was reconstructed for each scan and the insert volume was calculated. Gravimetric analysis was performed for all inserts, and the micro-CT and gravimetric volumes were compared to determine accuracy. We created three-dimensional surface deviation maps. RESULTS:Micro-CT generated high-quality three-dimensional renderings of the insert surface geometry. Between-scan precision was 0.07%; we observed no difference between micro-CT and gravimetric volume measurements. CONCLUSIONS:Micro-CT can provide precise and accurate volumetric measurements in addition to quantifiable three-dimensional surface deviation maps for the entire insert surface. The technique has the potential to evaluate wear in wear simulator trials and retrieval studies. CLINICAL RELEVANCE:This micro-CT technique combines the benefits of volumetric and surface scanning methods to quantify wear across all surfaces of polyethylene components with a single tool. When applied in wear simulator and retrieval studies, these measurements can be used to evaluate and predict the wear properties of the components.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Teeter MG,Naudie DD,McErlain DD,Brandt JM,Yuan X,Macdonald SJ,Holdsworth DWdoi
10.1007/s11999-010-1490-6subject
Has Abstractpub_date
2011-01-01 00:00:00pages
107-12issue
1eissn
0009-921Xissn
1528-1132journal_volume
469pub_type
杂志文章abstract：:Twenty-one patients older than 60 years of age with septic arthritis were reviewed over a ten-year period. The knee was the joint most commonly involved. Concurrent medical illnesses were noted in the majority of patients, with diabetes mellitus present in 24%. Seventy-one percent of patients had roentgenographic evid...
journal_title：Clinical orthopaedics and related research
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abstract：:The lumbar syndrome of Paget's disease is classified according to its severity, clinical findings, biochemical factors, and radiological pattern. Pagetoid spinal stenoses may occur in three stages as a progressive clinical syndrome. Several diagnostic procedures, including computerized tomography, (CT) are analyzed to...
journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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更新日期：1981-05-01 00:00:00
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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更新日期：1975-10-01 00:00:00
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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journal_title：Clinical orthopaedics and related research
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更新日期：1992-10-01 00:00:00
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