Reduced UHMWPE Wear Using Magnesia-Stabilized Zirconia Instead of CoCr Femoral Components in a Knee Simulator

Roy, Marcel E.; Whiteside, Leo A.; Tilden, D.; Noel, Oscar F.

doi:10.1016/j.arth.2014.09.027

Cited by 8 publications

(4 citation statements)

References 37 publications

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“…Nevertheless, as the present ball-on-flat contact with static load and the hypotrochoidal track, implemented by biaxial translations of the pins and of the discs, were naturally not intended to mimic the in vivo kinematics of the prosthetic knee in the way that full-scale knee joint simulations are [12][13][14][15][16], they admittedly were also limitations of the study. However, simplifications of the contact mechanics and of the type of relative motion are common for all pin-on-disc wear testing.…”

Section: Discussionmentioning

confidence: 99%

High frequency circular translation pin-on-disc wear testing of UHMWPE using a ball-on-flat contact along a hypotrochoidal track

Saikko

2017

Polymer Testing

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Section: Discussionmentioning

confidence: 99%

High frequency circular translation pin-on-disc wear testing of UHMWPE using a ball-on-flat contact along a hypotrochoidal track

Saikko

2017

Polymer Testing

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“…An advantage of the latter method is that it does not damage the evaluated surface and further evaluations are still possible. Both contact and noncontact profilometry have been used to evaluate changes in surface roughness after in vitro or in vivo testing of newly proposed materials for use in total knee arthroplasty (TKA) 15,16 . For instance, surface analysis of explanted TKA prostheses showed significant measurable changes in implant surface roughness after in vivo articulation 14,17–19 .…”

Section: Introductionmentioning

confidence: 99%

“…Both contact and noncontact profilometry have been used to evaluate changes in surface roughness after in vitro or in vivo testing of newly proposed materials for use in total knee arthroplasty (TKA). 15 , 16 For instance, surface analysis of explanted TKA prostheses showed significant measurable changes in implant surface roughness after in vivo articulation. 14 , 17 , 18 , 19 Additionally, Bülhoff et al 20 showed that the metallic articulating surface of retrieved shoulder hemiarthroplasties changed over time in vivo, and that deformation occurred.…”

Section: Introductionmentioning

confidence: 99%

Surface texture analysis of different focal knee resurfacing implants after 6 and 12 months in vivo in a goat model

Aşık

Damen

Hugten

et al. 2022

Journal Orthopaedic Research

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The clinical success of osteochondral implants depends significantly on their surface properties. In vivo, an implant may roughen over time which can decrease its performance. The present study investigates whether changes in the surface texture of metal and two types of polycarbonate urethane (PCU) focal knee resurfacing implants (FKRIs) occurred after 6 and 12 months of in vivo articulation with native goat cartilage. PCU implants which differed in stem stiffness were compared to investigate whether the stem fixating the implant in the bone influences surface topography. Using optical profilometry, 19 surface texture parameters were evaluated, including spatial distribution and functional parameters obtained from the material ratio curve. For metal implants, wear during in vivo articulation occurred mainly via material removal, as shown by the significant decrease of the core‐valley transition from 91.5% in unused implants to 90% and 89.6% after 6 and 12 months, respectively. Conversely, for PCU implants, the wear mechanism consisted in either filling of the valleys or flattening of the surface by dulling of sharp peaks. This was illustrated in the change in roughness skewness from negative to positive values over 12 months of in vivo articulation. Implants with a softer stem experienced the most deformation, shown by the largest change in material ratio curve parameters. We therefore showed, using a detailed surface profilometry analysis, that the surface texture of metal and two different PCU FKRIs changes in a different way after articulation against cartilage, revealing distinct wear mechanisms of different implant materials.

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“…Total knee replacement for patients with allergies to orthopedic materials requires low wear rate against polyethylene, no release of metal ions and particles from the implant, and fixation of the implant to the bone surface without poly(methyl methacrylate) (PMMA) cement. Magnesia‐stabilized zirconia (Mg‐PSZ) is a hard‐ceramic material that has been shown to cause less polyethylene wear in total hip and knee wear simulator tests, compared to cobalt chromium alloy (CoCr) bearing surfaces. In knee arthroplasty, an Mg‐PSZ femoral component does not release metal ions during normal wear.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adhesion of plasma‐sprayed commercially pure titanium porous coatings to polished Mg‐PSZ ceramic substrates

Tilden

Roy

Whiteside

2019

J Biomedical Materials Res

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The purpose of this study was to evaluate the suitability of a plasma sprayed titanium porous coating on polished magnesia‐stabilized zirconia (Mg‐PSZ) ceramic surfaces. We hypothesized that diffusion bonding was responsible for the adhesion of the coating to the ceramic substrate. Mg‐PSZ tensile test coupons were vibratory polished (roughness Sa = 0.50 μm) or vibratory polished/lapped (Sa = 0.12 μm) before coating and testing. The exposed surfaces after tensile testing were examined by energy dispersive X‐ray (EDX) analysis. Mg‐PSZ shear test coupons were vibratory polished (Sa = 0.48 μm). As the surface roughness of the ceramic substrate decreased by a factor of 4.175, the coating tensile strength increased from 62.6 to 66.8 MPa, comparable to that of porous coated cobalt chromium (CoCr) and titanium (Ti‐6Al‐4V) coupons. EDX analyses found titanium everywhere on the ceramic surface after the titanium layer was pulled off with tensile testing, even on areas that appeared to be “clean” to the naked eye. This suggested that titanium oxide compounds were present at the interface, where the oxygen required could only result from diffusion bonding across the interface. Diffusion bonding may also explain the significantly higher amounts of zirconium on the coating surface that had been pulled off the smoother lapped ceramic coupons. The measured shear strength of porous‐coated ceramic coupons was significantly higher than that of CoCr and Ti‐6Al‐4V coupons. The superior adherence of the titanium coating to Mg‐PSZ suggests this process has great clinical potential in arthroplasty, especially for patients with metal sensitivity. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1925–1932, 2019.

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Reduced UHMWPE Wear Using Magnesia-Stabilized Zirconia Instead of CoCr Femoral Components in a Knee Simulator

Cited by 8 publications

References 37 publications

High frequency circular translation pin-on-disc wear testing of UHMWPE using a ball-on-flat contact along a hypotrochoidal track

High frequency circular translation pin-on-disc wear testing of UHMWPE using a ball-on-flat contact along a hypotrochoidal track

Surface texture analysis of different focal knee resurfacing implants after 6 and 12 months in vivo in a goat model

Enhanced adhesion of plasma‐sprayed commercially pure titanium porous coatings to polished Mg‐PSZ ceramic substrates

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