Edge Loading Has a Paradoxical Effect on Wear in Metal-on-Polyethylene Total Hip Arthroplasties

Harris, William H.

doi:10.1007/s11999-012-2330-7

Cited by 45 publications

(27 citation statements)

References 27 publications

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“…The effect on metal-on-polyethylene THAs is less clear. Although in a review article by Harris et al [30], it seems that edge loading does not accelerate wear at the articulation in metal-onpolyethylene THAs, we do not yet know of its effect on the head-neck taper interface. When edge loading is coupled with certain taper designs such as one with a low taper angle, then the shear forces may be sufficiently high to manifest as clinically significant taper corrosion.…”

Section: Discussionmentioning

confidence: 87%

Effect of Taper Design on Trunnionosis in Metal on Polyethylene Total Hip Arthroplasty

Tan

Teeter

Balso

et al. 2015

The Journal of Arthroplasty

104

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Keywords:taper corrosion taper design trunnionosis metal-on-polyethylene total hip arthroplasty This study examines how taper design affects corrosion and fretting at the head trunnion surface. All hip prostheses retrieved between 1999 and 2013 with 28 mm/+0 heads were selected, resulting in 44 cobalt-chrome-onpolyethylene implants, representing six taper designs. Mean implantation time: 8.9 ± 3.7 years. The femoral head tapers were scored for fretting and corrosion using the Goldberg scale as both a combined score and by three zones (apex, central and base). There was no difference in age (P = 0.34), BMI (P = 0.29), or implantation time (P = 0.19) between taper groups. The 11/13 taper had the highest combined corrosion and fretting score, but no difference (P = 0.22) between groups for combined scores (P = 0.22 for corrosion, P = 0.19 for fretting). In a zone-specific analysis, the 11/13 taper had highest corrosion score at base zone (P = 0.02). Taper design had a significant effect on corrosion at base of trunnion.Crown

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Section: Discussionmentioning

confidence: 87%

Effect of Taper Design on Trunnionosis in Metal on Polyethylene Total Hip Arthroplasty

Tan

Teeter

Balso

et al. 2015

The Journal of Arthroplasty

104

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“…On the other hand, UHMWPE tests could be run even dry, without any lubricant, and still no damage to the components occurred despite considerable frictional heating [3]. Moreover, edge loading does not increase the wear of UHMWPE cups [29][30][31].…”

Section: Discussionmentioning

confidence: 99%

Effect of increased load on the wear of a large diameter metal-on-metal modular hip prosthesis with a high inclination angle of the acetabular cup

Saikko

2016

Tribology International

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This is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail. Author(s):Saikko, Vesa Title: Effect of increased load on the wear of a large diameter metal-on-metal modular hip prosthesis with a high inclination angle of the acetabular cup All material supplied via Aaltodoc is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. AbstractIn some earlier hip simulator studies of large-diameter metal-on-metal (MoM) hip prostheses high, unexplained variation in wear has been observed. In the present study it was found that high variation occurs when the tribological endurance limit of the MoM device in question is being approached. When the limit is exceeded, high wear takes place uniformly, and the variation is low. Below the limit, both the wear and its variation are low. The endurance limit was exceeded by increasing the peak load from 2 kN to 3 kN, to simulate obesity. The acetabular cup inclination angle was high, 70°. Potential clinical wear problems can be predicted by hip simulator studies provided that relevant adverse test conditions are included.

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“…Edge wear is a commonly observed phenomenon in THR [86], including impingement (FIGURE 5A), edge loading at the rim of the liner (FIGURE 5B) and microseparation (FIGURE 5C), that is influenced by the implant position, implant design and patient factors (range of motion and soft tissue constraint). Impingement occurs if the femoral neck comes into contact with the acetabular cup or liner, bone-to-implant or bone-to-bone contact during specific movements, due to an inaccurate implant position or unfavorable implant design.…”

Section: Edge Wearmentioning

confidence: 99%

Wear testing of total hip replacements under severe conditions

Zietz

Fabry

Reinders

et al. 2015

Expert Review of Medical Devices

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Controlled wear testing of total hip replacements in hip joint simulators is a well-established and powerful method, giving an extensive prediction of the long-term clinical performance. To understand the wear behavior of a bearing and its limits under in vivo conditions, testing scenarios should be designed as physiologically as possible. Currently, the ISO standard protocol 14242 is the most common preclinical testing procedure for total hip replacements, based on a simplified gait cycle for normal walking conditions. However, in recent years, wear patterns have increasingly been observed on retrievals that cannot be replicated by the current standard. The purpose of this study is to review the severe testing conditions that enable the generation of clinically relevant wear rates and phenomena. These conditions include changes in loading and activity, third-body wear, surface topography, edge wear and the role of aging of the bearing materials.

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Edge Loading Has a Paradoxical Effect on Wear in Metal-on-Polyethylene Total Hip Arthroplasties

Cited by 45 publications

References 27 publications

Effect of Taper Design on Trunnionosis in Metal on Polyethylene Total Hip Arthroplasty

Effect of Taper Design on Trunnionosis in Metal on Polyethylene Total Hip Arthroplasty

Effect of increased load on the wear of a large diameter metal-on-metal modular hip prosthesis with a high inclination angle of the acetabular cup

Wear testing of total hip replacements under severe conditions

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