Wear and Friction of Elastomers

Denton, Ronald L.; Keshavan, M. K.

doi:10.1520/stp1145-eb

Cited by 11 publications

(2 citation statements)

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“…3,4,7,9,13,23,24,31,33-35 Previous concerns with OxZr relating to surface scratching, changes in wear properties with in vitro loading, or the bioactivity of particulate debris, were not observed (either because they were not present or remained subclinical), with no additional risk of complications compared with CoCr. 39,40 Hip articulations combining both OxZr and CoCr femoral heads with XLPE produced comparable wear rates, which were within the reported threshold of 0.1 mm/year for osteolysis, at all time intervals at ten years after THA. 34 Importantly, the diverging rates of linear wear between OxZr and CoCr femoral heads over the first decade require further follow-up to assess how these findings will to translate to any differences in longer-term polyethylene wear, clinical outcomes, and revision surgery between these groups.…”

Section: Discussionsupporting

confidence: 68%

Oxidized zirconium versus cobalt-chrome femoral heads in total hip arthroplasty: a multicentre prospective randomized controlled trial with ten years’ follow-up

Kayani

Baawa-Ameyaw

Fontalis

et al. 2022

The Bone & Joint Journal

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Aims This study reports the ten-year wear rates, incidence of osteolysis, clinical outcomes, and complications of a multicentre randomized controlled trial comparing oxidized zirconium (OxZr) versus cobalt-chrome (CoCr) femoral heads with ultra-high molecular weight polyethylene (UHMWPE) and highly cross-linked polyethylene (XLPE) liners in total hip arthroplasty (THA). Methods Patients undergoing primary THA were recruited from four institutions and prospectively allocated to the following treatment groups: Group A, CoCr femoral head with XLPE liner; Group B, OxZr femoral head with XLPE liner; and Group C, OxZr femoral head with UHMWPE liner. All study patients and assessors recording outcomes were blinded to the treatment groups. The outcomes of 262 study patients were analyzed at ten years’ follow-up. Results Patients in Group C were associated with increased mean liner wear rates compared to patients in Group A (0.133 mm/yr (SD 0.21) vs 0.031 mm/yr (SD 0.07), respectively; p < 0.001) and Group B (0.133 mm/yr (SD 0.21) vs 0.022 mm/yr (SD 0.05), respectively; p < 0.001) at ten years’ follow-up. Patients in Group C were also associated with increased risk of osteolysis and aseptic loosening requiring revision surgery, compared with patients in Group A (7/133 vs 0/133, respectively; p = 0.007) and Group B (7/133 vs 0/135, respectively; p = 0.007). There was a non-statistically significant trend towards increased mean liner wear rates in Group A compared with Group B (0.031 mm/yr (SD 0.07) vs 0.022 mm/yr (SD 0.05), respectively; p = 0.128). All three groups were statistically comparable preoperatively and at ten years’ follow-up when measuring normalized Western Ontario and McMaster Universities Osteoarthritis Index (p = 0.410), 36-Item Short Form Health Survey (p = 0.465 mental, p = 0.713 physical), and pain scale scores (p = 0.451). Conclusion The use of UHMWPE was associated with progressively increased annual liner wear rates after THA compared to XLPE. At ten years’ follow-up, the group receiving UHMWPE demonstrated an increased incidence of osteolysis and aseptic loosening requiring revision surgery compared to XLPE. Femoral heads composed of OxZr were associated with trend towards reduced wear rates compared to CoCr, but this did not reach statistical significance and did not translate to any differences in osteolysis, functional outcomes, or revision surgery between the two femoral head components. Cite this article: Bone Joint J 2022;104-B(7):833–843.

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Section: Discussionsupporting

confidence: 68%

Oxidized zirconium versus cobalt-chrome femoral heads in total hip arthroplasty: a multicentre prospective randomized controlled trial with ten years’ follow-up

Kayani

Baawa-Ameyaw

Fontalis

et al. 2022

The Bone & Joint Journal

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“…Denton et al performed cylinder-on-plate tests with water lubrication. After running-in, the coefficient of friction increased from 0.03 to approximately 0.1 [37]. Schröder et al [34] found similar sliding friction values (0.07 to 0.10) for different prosthetic materials.…”

Section: Discussionmentioning

confidence: 93%

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

et al. 2021

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Total knee arthroplasty is on the rise worldwide. Despite its success, revision surgeries are also increasing. According to the American Joint Replacement Registry 2020, 3.3% of revision surgeries are due to wear, and 24.2% are due to mechanical loosening. The combination of shear stresses and wear particles occurring at the bone/implant interface can lead to local osteolysis. Although the shear stresses are partially driven by joint friction, relatively little is known about the evolution of the coefficient of friction (CoF) during a gait cycle in total knee replacement. Here we describe the CoF during a gait cycle and investigate its association with kinematics (slide–roll-ratio), applied load, and relative velocity. The artificial knee was simulated by cobalt–chromium condyle on a flat ultra-high-molecular-weight polyethylene (UHMWPE) tibial plateau, lubricated by either water or proteinaceous solution. We found that the CoF is not a constant but fluctuates between the values close to 0 and 0.15. Cross-correlation suggested that this is primarily an effect of the slide–roll ratio and the contact pressure. There was no difference in the CoF between water and proteinaceous solution. Knowledge about the CoF behavior during a gait cycle will help to increase the accuracy of future computational models of total knee replacement.

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Tribology of Polymeric Solids and Their Composites

Briscoe¹,

Sinha²

2005

Wear – Materials, Mechanisms and Practice

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Wear and Friction of Elastomers

Cited by 11 publications

References 0 publications

Oxidized zirconium versus cobalt-chrome femoral heads in total hip arthroplasty: a multicentre prospective randomized controlled trial with ten years’ follow-up

Oxidized zirconium versus cobalt-chrome femoral heads in total hip arthroplasty: a multicentre prospective randomized controlled trial with ten years’ follow-up

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

Tribology of Polymeric Solids and Their Composites

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