Examination of surface and material properties of explanted zirconia femoral heads

Santos, Elza Maria Carneiro Mendes Ferreira dos; Vohra, Shikar; Catledge, Shane A.; McClenny, Michelle D.; Cook, Monique; Vohra, Yogesh K.; Lemons, Jack E.; Moore, K.David

doi:10.1016/j.arth.2003.12.041

Cited by 24 publications

(40 citation statements)

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“…Santos et al 12 reported that there was no clear correlation between increasing monoclinic surface content and surface roughness. They suggested that other factors, such as thirdbody wear or contact with the acetabular shell during reduction manoeuvres, were likely to play a crucial role in the long-term health of the zirconia head surface.…”

Section: Discussionmentioning

confidence: 99%

“…The units are in millimol percent and are derived by taking the ratio of tetragonal to monoclinic peak areas in XRD and comparing that to a known library control of either 100% monoclinic or 100% tetragonal content in millimol percent units. 12 A stereoscopic zoom microscope (Nikon, Melville, New York) was used to examine the gross appearance of UHMWPE liners for evidence of embedded particle debris corresponding to each femoral head. The evidence for particle embedding was examined qualitatively by a research associate who had no knowledge of the clinical and experimental results.…”

Section: Methodsmentioning

confidence: 99%

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Tribological and material analyses of retrieved alumina and zirconia ceramic heads correlated with polyethylene wear after total hip replacement

Kim

2008

The Journal of Bone and Joint Surgery. British volume

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It has been suggested that the wear of ultra-high molecular weight polyethylene (UHMWPE) in total hip replacement is substantially reduced when the femoral head is ceramic rather than metal. However, studies of alumina and zirconia ceramic femoral heads on the penetration of an UHMWPE liner in vivo have given conflicting results. The purpose of this study was to examine the surface characteristics of 30 alumina and 24 zirconia ceramic femoral heads and to identify any phase transformation in the zirconia heads. We also studied the penetration rate of alumina and zirconia heads into contemporary UHMWPE liners. The alumina heads had been implanted for a mean of 11.3 years (8.1 to 16.2) and zirconia heads for a mean of 9.8 years (7.5 to 15). The mean surface roughness values of the explanted alumina heads (Ra 40.12 nm and Rpm 578.34 nm) were similar to those for the explanted zirconia heads (Ra 36.21 nm and Rpm 607.34 nm). The mean value of the monoclinic phase of two control zirconia heads was 1% (0.8% to 1.5%) and 1.2% (0.9% to 1.3%), respectively. The mean value of the monoclinic phase of 24 explanted zirconia heads was 7.3% (1% to 26%). In the alumina group, the mean linear penetration rate of the UMWPE liner was 0.10 mm/yr (0.09 to 0.12) in hips with low Ra and Rpm values (13.22 nm and 85.91 nm, respectively). The mean linear penetration rate of the UHMWPE liner was 0.13 mm/yr (0.07 to 0.23) in hips with high Ra and Rpm values (198.72 nm and 1329 nm, respectively). This difference was significant (p = 0.041). In the zirconia head group, the mean linear penetration rate of the UHMWPE liner was 0.09 mm/yr (0.07 to 0.14) in hips with low Ra and Rpm values (12.78 nm and 92.99 nm, respectively). The mean linear penetration rate of the UHMWPE liner was 0.12 mm/yr (0.08 to 0.22) in hips with high Ra and Rpm values (199.21 nm and 1381 nm, respectively). This difference was significant (p = 0.039). The explanted zirconia heads which had a minimal phase transformation had similar surface roughness and a similar penetration rate of UHMWPE liner as the explanted alumina head.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Tribological and material analyses of retrieved alumina and zirconia ceramic heads correlated with polyethylene wear after total hip replacement

Kim

2008

The Journal of Bone and Joint Surgery. British volume

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“…Structural changes within the zirconium-oxide ceramic which affect the surface and mechanical properties of implants have also been reported for other retrieved zirconium oxide ceramic femoral heads. 16 For ethical reasons, our study had to be interrupted; as a consequence, fewer patients than planned were recruited. However, this did not affect the statistical power of the study as the differences between groups were large.…”

Section: Discussionmentioning

confidence: 99%

Total hip replacement with a zirconium oxide ceramic femoral head

Schewelov¹,

Sanzén²,

Önsten³

et al. 2005

The Journal of Bone and Joint Surgery. British volume

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We investigated the wear characteristics and clinical performance of four different total hip joint articulations in 114 patients. Wear and migration was measured by roentgenstereophotogrammetric analysis at five years or at the last follow-up. The mean annual wear was 0.11 mm for a stainless steel/Enduron articulation, 0.34 mm for stainless steel/Hylamer cup, 0.17 mm for zirconium oxide ceramic/Enduron and 0.40 mm for zirconium oxide ceramic/Hylamer. The difference between the groups was significant (p < 0.008) except for stainless steel/Hylamer vs zirconium oxide ceramic/Hylamer (p = 0.26). At present, 12 patients have undergone a revision procedure, four at five years and eight thereafter. No patient who received a stainless steel/Enduron articulation at their primary replacement required revision. Conflicting results have been reported about the performance of the zirconium oxide ceramic femoral head, but our findings suggest that it should not be used with a polymethylmethacrylate acetabular component. Hylamer has already been withdrawn from the market.

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“…Cattani-Lorente et al 24) , Alghazzawi et al 25) , Catledge et al 26) and Santos et al 27) found a strong linear correlation between the increase in monoclinic fraction and decrease in surface hardness. However, no linear correlation between amount of monoclinic phase and surface hardness was observed in the current study.…”

Section: Discussionmentioning

confidence: 99%

Effects of multiple firings on the microstructure of zirconia and veneering ceramics

2016

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The aim of study was to evaluate the effects of multiple firings on the microstructures of zirconia and two ceramics. Vita VM9 (VM-Z) and Cerabien ZR (C-Z) ceramics on a zirconia framework and zirconia without veneering ceramic (WO-Z) were evaluated. Firing methods included firing two, five, and ten times (n=10). The effects of multiple firings on the surface hardness of the materials were evaluated using a Vickers hardness (HV) tester. Data were analyzed by two-way ANOVA and Tukey's test (α=0.05). After firing five and ten times, the hardness of VM-Z and C-Z increased significantly (p<0.001). The HVs of the Cerabien ZR and Vita VM9 veneering ceramics were similar (p>0.05). In the XRD analysis, zirconia had similar tetragonal (t)-monoclinic (m) phase transformations of Y-TZP after the different firing times. Clinically, multiple firings did not affect the microstructure of zirconia, but the structures of the two ceramics were affected.

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Examination of surface and material properties of explanted zirconia femoral heads

Cited by 24 publications

References 0 publications

Tribological and material analyses of retrieved alumina and zirconia ceramic heads correlated with polyethylene wear after total hip replacement

Tribological and material analyses of retrieved alumina and zirconia ceramic heads correlated with polyethylene wear after total hip replacement

Total hip replacement with a zirconium oxide ceramic femoral head

Effects of multiple firings on the microstructure of zirconia and veneering ceramics

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