Severe damage of alumina-on-alumina hip implants: Wear assessments at a microscopic level

Affatato, Saverio; Taddei, Paola; Carmignato, Simone; Modena, Enrico; Toni, Aldo

doi:10.1016/j.jeurceramsoc.2012.05.023

Cited by 16 publications

(11 citation statements)

References 50 publications

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“…Alumina is one of the most common structural ceramic well known for its technological and industrial applications . Almost all such applications will involve contact and contact‐induced stress endurance.…”

Section: Introductionmentioning

confidence: 99%

Grain Boundary Nanohardness of Coarse Grain Alumina

Dey¹,

Bhattacharya

Mukhopadhyay

2014

Int J Applied Ceramic Tech

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Here, we present the results of nanoindentation experiments conducted at ultralow peak loads of, for example, 1000, 5000, and 10,000 lN on a dense (~99.5%), coarse grain (~10 lm) alumina ceramic. The results showed that the nanohardness values of alumina were sensitive to the applied loads as well as to the locations of measurements, for example, the center of the grain, away from the center of the grain and at the vicinity of the grain boundary. The location sensitivity of nanohardness was linked to compositional variations of the different locations and to the presence of an amorphous phase.

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Section: Introductionmentioning

confidence: 99%

Grain Boundary Nanohardness of Coarse Grain Alumina

Dey¹,

Bhattacharya

Mukhopadhyay

2014

Int J Applied Ceramic Tech

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“…As it can be seen, upon wear, a slight broadening of the band at 417 cm 21 was observed; this effect was not observed for the CP_09 alumina head. On the basis of a previous study, 43 the occurrence of band broadening without wavenumber shifting does not appear surprising; actually, the band FWHM appeared more sensitive to stress than its wavenumber position. An analogous result has been reported for the CAC stretching band of UHMWPE at 1130 cm 21 .…”

Section: Micro-raman and Fluorescence Resultsmentioning

confidence: 66%

May the surface roughness of the retrieved femoral head influence the wear behavior of the polyethylene liner?

et al. 2015

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This study was aimed at determining the surface degradation occurred on retrieved ceramic and metallic heads, as well as the influence of the head surface quality on the wear of the polyethylene counterface. To this purpose, 14 ceramic and 14 metallic femoral heads retrieved at revision surgery were examined. Scanning electron microscopic analysis provided visual evidence that some metallic heads presented crescent wear more often than the ceramic ones; the former showed a higher volumetric loss (as determined by Coordinate Measuring Machine) than the latter, but less negative Rsk values. This apparent lack of correlation between volumetric loss (i.e., wear factor) and roughness data may be explained by considering that they are two temporally variant parameters. No significant differences were observed between the Ra values of the two sets of femoral heads. The cups articulating against metal heads were characterized by higher mean wear volumes than those articulating against alumina although this difference was not statistically significant; metal heads displayed significantly higher mean wear volumes than alumina heads. The micro-Raman analysis of the cup articulated against the most worn alumina femoral head showed an orthorhombic into monoclinic phase transformation that was not observed in the cups coupled to metal heads. The obtained results showed that the surface finishing of the femoral head (in terms of Rsk values) determined the morphological changes experienced by the ultra-high-molecular-weight polyethylene crystalline phase at the molecular level. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1374-1385, 2016.

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“…Experimental hip simulator and computational studies on CoC and MoM bearings have consistently shown very low wear rates under standard hip simulator conditions which correlates to well-positioned prostheses [23,68,[118][119][120][121][122][123][124][125]. However, this has not been confirmed by long-term retrieval analyses [21,[126][127][128][129][130]. The standard conditions are defined with the femoral head sitting concentrically with the acetabular cup and the acetabular cup with a clinically equivalent inclination angle of less than .…”

Section: High Wear Rates Of Noisy Hips Observed In Vivomentioning

confidence: 99%

A review of squeaking in ceramic total hip prostheses

Askari

Flores

Dabirrahmani

et al. 2016

Tribology International

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The occurrence of audible squeaking in some patients with ceramic-on-ceramic (CoC) hip prostheses is a cause for concern. Great effort has been dedicated to understand the mechanics of the hip squeaking to gain a deeper insight into factors contributing to sound emission from CoC hip articulation. Disruption of fluid-film lubrication and friction were reported as the main potential cause, while patient and surgical factors, and design and material of hip implants, were also identified as leading factors. This article summarises the recent available literature on this subject to provide a platform for future research and development. Moreover, high wear rates and ceramic liner fracture as viable consequences of hip squeaking are discussed.

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Severe damage of alumina-on-alumina hip implants: Wear assessments at a microscopic level

Cited by 16 publications

References 50 publications

Grain Boundary Nanohardness of Coarse Grain Alumina

Grain Boundary Nanohardness of Coarse Grain Alumina

May the surface roughness of the retrieved femoral head influence the wear behavior of the polyethylene liner?

A review of squeaking in ceramic total hip prostheses

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