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Wear of composite ceramics in mixed‐material combinations in total hip replacement under adverse edge loading conditions
Author(s) -
AlHajjar Mazen,
Carbone Silvia,
Jennings Louise M.,
Begand Sabine,
Oberbach Thomas,
Delfosse Daniel,
Fisher John
Publication year - 2017
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33671
Subject(s) - materials science , ceramic , composite material , cubic zirconia , composite number , bearing (navigation) , enhanced data rates for gsm evolution , femoral head , medicine , surgery , telecommunications , cartography , computer science , geography
Ceramic composites have performed very well under adverse edge loading conditions when used in like‐on‐like configurations, where the femoral head and acetabular cup are of the same material. The aim of this study was to determine the wear of pure alumina (Al 2 O 3 ), alumina toughened zirconia (ATZ) and zirconia toughened alumina (ZTA) when used in mixed bearing combinations, under edge loading conditions due to translational mal‐positioning. The head‐on‐cup configurations of three ceramic materials were ATZ‐on‐ZTA, ZTA‐on‐ATZ, Al 2 O 3 ‐on‐ATZ, ATZ‐on‐Al 2 O 3 , Al 2 O 3 ‐on‐ZTA, and ZTA‐on‐Al 2 O 3 . They were tested on the Leeds II hip simulator under microseparation conditions. The bedding in and steady state wear rates of ATZ‐on‐ZTA were 1.16mm 3 /million cycles and 0.18mm 3 /million, respectively, and for ATZ‐on‐Al 2 O 3 were 0.66 mm 3 /million cycles and 0.20 mm 3 /million, respectively. The wear rates of the other bearing combinations under these adverse microseparation conditions, Al 2 O 3 ‐on‐ATZ, Al 2 O 3 ‐on‐ZTA, ZTA‐on‐ATZ and ZTA‐on‐Al 2 O 3 were very low with no clear bedding in and steady state phases, and with steady state wear rates lower than 0.11 mm 3 /million. The mixed material combinations tested in this study have shown slightly higher wear rates when compared to ATZ in like‐on‐like configuration reported previously, but superior wear resistance when compared to alumina‐on‐alumina bearings tested previously under the same adverse microseparation conditions. © 2016 The Authors Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1361–1368, 2017.