The Causes of Femoral Head Roughening in Explanted Charnley Hip Prostheses

Isaac, Graham; Atkinson, J. R.; Dowson, D.; Kennedy, P D; Smith, Mark

doi:10.1243/emed_jour_1987_016_035_02

Cited by 65 publications

(34 citation statements)

References 10 publications

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“…SEM inspection of the explanted femoral heads tended to reflect the results previously cited in the literature [14][15][16]. In particular, the multidirectional nature of the scratches was apparent when using the SEM and from the profilometer results.…”

Section: Discussionsupporting

confidence: 62%

The surface topography of retrieved femoral heads

Hall

Unsworth

Siney

et al. 1996

J Mater Sci: Mater Med

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Excessive wear of UHMWPE sockets is considered detrimental to the long-term performance of total hip replacement procedures. Although many factors contribute to the wear process, laboratory experiments have indicated that one of the most important factors affecting the wear rate is surface topography and in particular, the arithmetic mean surface roughness, Ra, of the hard counterface. Surface roughness values were therefore obtained from the heads of 37 explanted and five new Charnley prostheses. The surface topography was measured using a Rodenstock RM 600 non-contacting profilometer. Five parameters were used to give a quantitative characterization of the surface texture; arithmetic mean surface roughness, Ra, root mean square (RMS) surface roughness, Rq, peakto valley height, Rt, average single peak to valley height from five adjoining sample lengths, Rz, and the skewness of the height distribution, Sk. Further, qualitative investigations were undertaken using a JoeI-JSM-IC848 scanning electron microscope (SEM). The median values of Ra, Rq, Rt and Rz for explanted heads showed statistically significant increases when compared with values from new prostheses. No significant difference was found between any of these parameters measured in the anterior-posterior and the medial-lateral directions. This result may have important implications for the design of joint simulators. No correlation was found between any of the parameters and implant period.

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Section: Discussionsupporting

confidence: 62%

The surface topography of retrieved femoral heads

Hall

Unsworth

Siney

et al. 1996

J Mater Sci: Mater Med

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“…[4][5][6] The abrasive effect of such particles was reported as the predominant cause of scratching damage to stainless steel femoral head components, which causes increased wear in the polyethylene acetabular cup. 7 When barium sulfate is used, particulate debris lead to similar damaging behavior 8 and enhanced inflammatory response. 9 Our approach for simultaneously enhancing mechanical properties and reducing the production of debris and wear particles consisted in the surface modification of the radiopacifying filler to improve its compatibility with the monomers and to further the establishment of a chemical bond with the acrylic matrix.…”

Section: Introductionmentioning

confidence: 99%

PMMA-based composite materials with reactive ceramic fillers: IV. Radiopacifying particles embedded in PMMA beads for acrylic bone cements

Abboud

Casaubieilh

Morvan

et al. 2000

J. Biomed. Mater. Res.

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New acrylic bone cements were prepared from alumina particles previously treated by 3-(trimethoxysilyl)propylmethacrylate (gamma-MPS) and embedded in poly(methylmethacrylate-co-ethylacrylate) beads with about 7 mol% of ethyl acrylate repeating units. The encapsulation was performed through a conventional suspension polymerization process. The influence of (i) the concentration of the dispersion stabilizer and (ii) the alumina content upon the shape, size, and size distribution of the acrylic beads was studied. Cements were prepared from each batch by hand-mixing alumina-filled acrylic beads with a liquid monomer mixture containing methyl methacrylate, n-butyl methacrylate, and N,N-dimethyl-p-toluidine. Benzoyl peroxide was previously added to the solid part. The powder-to-liquid ratio was equal to 2 for each formulation. Compressive strength of cured cement decreases with alumina content, whereas compressive modulus remains roughly constant. These results are in contradiction to those obtained for cements based on a mixture of gamma-MPS-treated alumina and unfilled acrylic beads. Nevertheless, they are interpreted in terms of alumina arrangement in the cement. In the first case, alumina particles contribute to the reinforcement of the dispersed acrylic phase, with poor benefits for the whole materials. In the second case, they allow the reinforcement of the continuous acrylic phase and, therefore, the cement's one.

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“…A potential disadvantage of a mobile spacer used for hip and knee arthroplasties is the development of abraded particles. Cement particles in the joint can embed in bearing surfaces and create scratches with the risk of wear and decreased survival of the implant [6,28,32]. Of these cement particles, the radiopaque agent zirconium dioxide seems to be the most important because of its high hardness according to the Mohs' scale [27].…”

Section: Introductionmentioning

confidence: 99%

Articulating Spacers Used in Two-stage Revision of Infected Hip and Knee Prostheses Abrade with Time

Fink

Rechtenbach

Büchner

et al. 2011

Clinical Orthopaedics &Amp; Related Research

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Background Articulating spacers used in two-stage revision surgery of infected prostheses have the potential to abrade and subsequently induce third-body wear of the new prosthesis. Questions/purposes We asked whether particulate material abraded from spacers could be detected in the synovial membrane 6 weeks after implantation when the spacers were removed for the second stage of the revision. Patients and Methods Sixteen hip spacers (cemented prosthesis stem articulating with a cement cup) and four knee spacers (customized mobile cement spacers) were explanted 6 weeks after implantation and the synovial membranes were removed at the same time. The membranes were examined by xray fluorescence spectroscopy, xray diffraction for the presence of abraded particles originating from the spacer material, and analyzed in a semiquantitative manner by inductively coupled plasma mass spectrometry. Histologic analyses also were performed.

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The Causes of Femoral Head Roughening in Explanted Charnley Hip Prostheses

Cited by 65 publications

References 10 publications

The surface topography of retrieved femoral heads

The surface topography of retrieved femoral heads

PMMA-based composite materials with reactive ceramic fillers: IV. Radiopacifying particles embedded in PMMA beads for acrylic bone cements

Articulating Spacers Used in Two-stage Revision of Infected Hip and Knee Prostheses Abrade with Time

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