PMID: 9429103Jan 16, 1998Paper

Dimensional characteristics of uncomplicated autopsy-retrieved acetabular polyethylene liners by ultrasound

Journal of Biomedical Materials Research
A BerzinsJ O Galante

Abstract

A new, in vitro ultrasound-based method to measure the thickness of acetabular polyethylene components was developed and applied to 26 uncomplicated autopsy retrieved components and 40 unused components. The average age at total hip arthroplasty was 62 years and the average time in service of the retrieved components was 49 months. The clinical notes indicated that each of the arthroplasties was functioning well at the time of the patients death. Thickness distributions in the retrieved components had two distinct patterns. Eighteen of the retrieved components (69%) had their thinnest areas self-contained and located near the polar point. In the other 8 retrieved components (31%) the areas of minimum thickness were adjacent to the rim. Thickness distribution in the unused cups was predominately concentric with the thinnest area located near the polar point (85% of the cups). Detection limits for dimensional change were established based on the variability found in the unused liners. Fifteen of the 26 retrieved components (58%) had areas of reduced thickness which exceeded the detection limits; the average thickness reduction rate for these components was 0.076 mm per year. The other 11 retrieved components (42%) lacked such are...Continue Reading

References

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Citations

Aug 5, 1998·Medical Engineering & Physics·R PietrabissaE Di Martino
Aug 5, 2003·Journal of Orthopaedic Science : Official Journal of the Japanese Orthopaedic Association·Tatsuro MizoueIan C Clarke
Jun 5, 2003·The Journal of Bone and Joint Surgery. American Volume·Karl F OrishimoCharles A Engh
Dec 4, 2003·The Journal of Bone and Joint Surgery. American Volume·Shantanu PatilDarryl D D'Lima
Mar 4, 2017·Clinical Orthopaedics and Related Research·Marzieh M ArdestaniMarkus A Wimmer
Aug 28, 2001·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·M T RaimondiL Molfetta
Feb 24, 2001·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·M T RaimondiR Pietrabissa
Dec 28, 1999·Clinical Orthopaedics and Related Research·P A Devane, J G Horne
Mar 15, 2003·The Journal of Bone and Joint Surgery. American Volume·Andrew J HuiCecil H Rorabeck
Jul 16, 2020·Journal of Shoulder and Elbow Surgery·Judd S DaySteven M Kurtz

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