2004
DOI: 10.1016/j.arth.2004.06.017
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Examination of surface and material properties of explanted zirconia femoral heads

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Cited by 77 publications
(18 citation statements)
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“…At this rate, the researchers concluded that the performance of ceramic-polyethylene wear couples should be unaffected for the lifetime of most patients. Yet, retrievals as well as in vitro studies showed considerable changes in surface finish in some particular heads [77,453]. The apparent contradiction in performance between in vitro and in vivo Y-TZP femoral heads was likely due to higher in vivo stresses which were not addressed nor replicated in the laboratory studies and to variations in the processes from one producer to another, and even from batch to batch.…”
Section: Hydrothermal Stabilitymentioning
confidence: 83%
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“…At this rate, the researchers concluded that the performance of ceramic-polyethylene wear couples should be unaffected for the lifetime of most patients. Yet, retrievals as well as in vitro studies showed considerable changes in surface finish in some particular heads [77,453]. The apparent contradiction in performance between in vitro and in vivo Y-TZP femoral heads was likely due to higher in vivo stresses which were not addressed nor replicated in the laboratory studies and to variations in the processes from one producer to another, and even from batch to batch.…”
Section: Hydrothermal Stabilitymentioning
confidence: 83%
“…This effect has become known as low-temperature hydrothermal degradation (LTD) [76]. The transformation results in increased implant surface roughness, enhanced wear, weakening of the material, and eventual fracture [72][73][74]77,78]. Despite its withdrawal from EU and US markets, Y-TZP femoral heads are still available for implantation in Asia, and recent physical chemistry analyses suggest that the unconstrained transformation experienced by the original EU manufacturer may be limited and controlled through improved processing and careful assessment before clinical use [79].…”
Section: Zirconiamentioning
confidence: 99%
“…When phase transformation occurs at the head-trunnion interface, it can initiate fracture (Clarke et al, 2003). Additionally, the effects of the phase transformation toughening mechanism become unusable for prevention of crack propagation as the tetragonal phase becomes consumed by hydrothermal degradation (Santos et al, 2004). …”
Section: Composition and Properties Of Ztamentioning
confidence: 99%
“…However, with zirconia ceramic, the potential exists for late phase transformation and aging, resulting in grain pullout, surface cracking, and increasing surface roughness [4,8,23,28]. Zirconia ceramic has three phases of physical structure.…”
Section: Introductionmentioning
confidence: 99%