Catastrophic Wear in a Metal-On-Ceramic Total Hip Arthroplasty

Valentí, J.R.; Rı́o, J. del; Amillo, S.

doi:10.1016/j.arth.2006.06.008

Cited by 21 publications

(33 citation statements)

References 12 publications

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“…He also suggested, approved, and prohibited couplings (based on tribological reasons) to avoid dangerous head/socket combinations (Willmann, 1998). More recently Valenti et al (2007) observed massive metallosis in an implanted stainless steel femoral head against an alumina ceramic acetabular cup after 6 weeks. Williams et al (2007) and Williams et al (2008), on the other hand, observed consistent reduced ion levels in patients, who had received COM implants.…”

Section: Discussionmentioning

confidence: 97%

“…Random assembly is, sometimes, a used practice in surgical theatre mainly in case of revision interventions (Morlock et al, 2001;Stiehl and Mahfouz, 2007;Valenti et al, 2007). The weight loss over a standard wear simulation was assessed.…”

Section: Discussionmentioning

confidence: 99%

“…The emphasis on the possible advantages of this innovative hybrid coupling might lead to a new intra-operative scenario: the use of a COM coupling with components not specifically proposed to be coupled. In the past the practice of coupling different materials led to clinical failures (Morlock et al, 2001;Valenti et al, 2007), but was poorly investigated from an experimental point of view (Barnes et al, 2008), even if it could be considered a worst-case scenario. This study investigated the wear behaviour of COM hip components, not specifically proposed to be coupled, in order to compare them with COC and MOM traditional bearings.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mixing and matching in ceramic-on-metal hip arthroplasty: An in-vitro hip simulator study

Affatato¹,

Spinelli²,

Squarzoni³

et al. 2009

Journal of Biomechanics

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mixing and matching in ceramic-on-metal hip arthroplasty: An in-vitro hip simulator study

Affatato¹,

Spinelli²,

Squarzoni³

et al. 2009

Journal of Biomechanics

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“…In fact, although CoM bearings are used clinically there is little knowledge about their in-vivo performance [14]. Some case reports have shown tremendous wear of CoM [15,16], but in those cases the technical design differed from that of modern CoM bearings. Keeping this in mind, simulator studies may be an important tool for acquiring knowledge of possible CoM-related risks.…”

Section: Introductionmentioning

confidence: 99%

Wear Performance of Ceramic-On-Metal Hip Bearings

et al. 2013

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Ceramic-on-metal (CoM) bearings are considered to be a promising alternative to polyethylene-based bearings or hard-on-hard bearings (Ceramic-on-Ceramic (CoC) and Metal-on-Metal (MoM)). Although, CoM shows lower wear rates than MoM, in-vitro wear testing of CoM shows widely varying results. This may be related to limitations of wear-measuring methods. Therefore, the aim of this study was to improve the gravimetric measurement technique and to test wear behaviour of CoM bearings compared to CoC bearings. Level walking according to ISO-14242 was simulated for four CoM and four CoC bearings. Prior to simulation, errors in measurement of gravimetric wear were detected and improvements in measurement technique incorporated. The results showed no differences in mean wear rates between CoM and CoC bearings. However, the CoM bearings showed wear results over a wide range of wear performance. High reliability of wear results was recorded for the CoC bearings. Material transfer was observed on the ceramic heads of the CoM bearings. Therefore, for level walking a partial mixed or boundary lubrication has to be assumed for this type of bearing. CoM is a highly sensitive wear-couple. The reasons for the observed behaviour cannot be clarified from this study. Simulator studies have to be considered as an ideal loading condition. Therefore, high variations in wear rates as seen in this study, even at low levels, may have an adverse effect on the in-vivo wear behavior. Careful clinical use may be advisable until the reasons for the variation are fully clarified and understood.

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“…In recent years, ceramic-on-metal (CoM) combinations have been tested in vitro [17][18][19][20][21][22][23][24][25][26][27][28], with a limited number being implanted in vivo [29][30][31]. Advantages of CoM over metal-on-metal (MoM) and CoC prostheses included a reduced volume of metal wear particles [26,31] and a reduced tendency for fracture of the ceramic component due to the softer metallic cup.…”

Section: Introductionmentioning

confidence: 99%

Tribological and surface analysis of 38mm alumina–as-cast Co–Cr–Mo total hip arthroplasties

Williams

Unsworth

et al. 2009

Proc Inst Mech Eng H

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There is currently much discussion over the use of ceramic femoral components against metal acetabular cups, for use in total hip arthroplasty. The current study investigates six hot isostatically pressed alumina femoral heads of 38 mm diameter articulating against six as-cast Co—Cr—Mo metallic acetabular cups. Standard walking-cycle simulator wear testing was carried out to 5×106 cycles using the Durham Mark II hip wear simulator, and wear was determined gravimetrically. In addition, surface topography, using a non-contacting profilometer, an atomic force microscope, and an optical microscope, was monitored throughout the wear test. The wear of the ceramic heads was found to be undetectable using the current gravimetric method; however, a change in the surface topography was seen, as grain removal on the pole was observed through atomic force microscopy analysis. A biphasic wear pattern was found for the metallic cups, with low wear rates of 1.04 ± 0.293 mm3/106 cycles (mean, ±95 per cent confidence interval) and 0.0209 ± 0.004 mm3/106 cycles (mean, ±95 per cent confidence interval) for running-in and steady state wear phases respectively. Frictional measurement revealed that the joints were tending towards full fluid-film lubrication in parts of the walking cycle. The results show that the combination of hot isostatically pressed alumina and as-cast Co—Cr—Mo is a promising alternative for total hip arthroplasties.

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Catastrophic Wear in a Metal-On-Ceramic Total Hip Arthroplasty

Cited by 21 publications

References 12 publications

Mixing and matching in ceramic-on-metal hip arthroplasty: An in-vitro hip simulator study

Mixing and matching in ceramic-on-metal hip arthroplasty: An in-vitro hip simulator study

Wear Performance of Ceramic-On-Metal Hip Bearings

Tribological and surface analysis of 38mm alumina–as-cast Co–Cr–Mo total hip arthroplasties

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