Effect of an edge at cup rim on contact stress during micro-separation in ceramic-on-ceramic hip joints

Liu, Feng; Fisher, John

doi:10.1016/j.triboint.2017.01.012

Cited by 18 publications

(14 citation statements)

References 31 publications

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“…Despite over 100‐fold differences in wear rates between CoC and conventional PE hips, revision rates at 13 years for uncemented CoC (5.69%) and uncemented MoP (5.90%) procedures are currently very similar . The fact that ceramic wear particles may be fewer in number but more reactive than polyethylene cannot be an explanation, as “ceramic wear debris has shown to be less biologically active.” Furthermore, wear rates for retrieved third‐generation ceramic bearings reported in the literature range from 0.3 to 1.9 mm 3 /year, so they show relatively good agreement with hip simulator studies.…”

Section: Introductionmentioning

confidence: 70%

Wear at the taper‐trunnion junction of contemporary ceramic‐on‐ceramic hips shown in a multistation hip simulator

Bhalekar¹,

Smith²,

Joyce³

2018

J Biomed Mater Res

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Ceramic-on-ceramic (CoC) total hip replacements (THR) have a substantially lower wear rate than metal-on-polyethylene (MoP) hips, as shown by hip simulator testing. However, the revision rates of CoC and MoP hips are comparable. To try and explain this discrepancy the wear, at both the bearing surfaces and taper-trunnion interface of 36 mm BIOLOXdelta CoC THRs, mounted on 12/14 titanium (Ti6Al4V) trunnions was investigated using a hip simulator (n = 3) and a dynamically loaded CoC sample in a separate test station. Wear was assessed gravimetrically and surface roughness measurements of the articulating and taper surfaces taken at regular intervals. Scanning electron microscopy, surface roughness, and gravimetric measurements of trunnions was performed. After 5 million cycles, the mean total wear from the ceramic articulating surfaces was 0.25 mm from the hip simulator test, and that from the titanium trunnions was 0.29 mm . This metal wear may provide an explanation for adverse reaction to metal debris found in contemporary CoC hip joints. It is therefore vital to consider taper-trunnion wear in preclinical testing of artificial hip joints. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B, 2018.

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Section: Introductionmentioning

confidence: 70%

Wear at the taper‐trunnion junction of contemporary ceramic‐on‐ceramic hips shown in a multistation hip simulator

Bhalekar¹,

Smith²,

Joyce³

2018

J Biomed Mater Res

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“…Intriguingly, all of the three revision-related events were demonstrated, as no statistical difference in the two groups. Ceramic wear debris has shown to be less biologically active in laboratory studies ( 33 ). Therefore, the explanation that ceramic wear particles may be fewer in number, but more reactive than PE cannot be convincing.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Ceramic-on-Ceramic vs. Ceramic-on-Polyethylene for Primary Total Hip Arthroplasty: A Meta-Analysis of 15 Randomized Trials

Shang

Yan

2021

Front. Surg.

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Objective: This meta-analysis aimed to compare ceramic-on-ceramic (COC) components and ceramic-on-polyethylene (COP) components during total hip arthroplasty (THA).Settings: A meta-analysis of randomized controlled trials (RCTs) comparing COC and COP during primary THA was conducted. Electronic searches were current to March 2021.Participants: Trials were included for meta-analysis if they compared at least the bearing surfaces of COC and COP for patients undergoing primary THA and if they reported the outcomes of THA after a certain period of follow-up and only RCTs in English were included.Primary and Secondary Outcome Measures: The primary endpoints consist of audible noise, prosthesis fracture, and revision. Secondary endpoints include dislocation, deep infection, osteolysis, and prosthesis loosening. Extracted data were statistically analyzed with the Stata11.0.Results: A total of 15 RCTs containing 2,702 patients (2,813 hips) were included in this study. The audible noise [odds ratio (OR) = 5.919; 95% CI: 2.043, 17.146; p ≤ 0.001] and prosthesis fracture (OR = 35.768; 95% CI: 8.957, 142.836; p = 0.001) were significantly higher in the COC group. Hip function, revision rate, dislocation rate, deep infection rate, osteolysis rate, and prosthesis loosening rate were comparable between these two groups, while the wear rate was higher in the COP group.Conclusion: This study indicated comparable outcomes of COC and COP bearing surfaces in primary THA; high-quality RCTs with a long-term follow-up are still urgently needed to provide more evidence on the optimal bearing surfaces in primary THA.

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“…44 Further, contact pressures of 20 MPa and 2.3 GPa was predicted under edge loading condition for MoP and CoC type implants, respectively. 11,12 Hence, the clinical outcome becomes inconsistence with the in vitro tests performed at normal walking contact pressure. 45 Therefore, edge loading conditions should be considered at the hip joint.…”

Section: Experiments Methodologymentioning

confidence: 99%

“…9,10 Despite having sound tribo-performance of CoCrMo, it is not aptly suitable for long-term implant application, particularly, to improve the longevity of hip implants. Liu and Fisher 11 studied the simulated contact pressure for an edge at cup rim during micro-separation in ceramic-on-ceramic hip implant. A maximum contact stress of 2.3 GPa was found, which elevated the implant wear and damaged the ceramic bearing.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive analysis of geometrical parameters of crosshatched texture for enhanced tribological performance under biological environment

Kashyap

Ramkumar

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study optimizes the texture geometry by investigating the individual effect of texture depth and area density of cross hatched texture to improve the tribological performance of hip implant at normal walking speed. Texture width was selected conforming to Hertzian contact of Ti6Al4V/ultrahigh molecular weight polyethylene tribo-pair. Crosshatched textures with different depths and area densities were fabricated on polished Ti6Al4V blocks using laser surface texturing technique. Tribology tests were carried out for different loads under bio-lubricated condition. Result shows significant influence of texture depth and area density for better tribological performance of the tribo-pair. Nearly 50% friction reduction and 15 times reduction in wear obtained for 5 µm depth at 25% area density. Surface morphology of worn-out pins showed abrasion wear mechanism.

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Effect of an edge at cup rim on contact stress during micro-separation in ceramic-on-ceramic hip joints

Cited by 18 publications

References 31 publications

Wear at the taper‐trunnion junction of contemporary ceramic‐on‐ceramic hips shown in a multistation hip simulator

Wear at the taper‐trunnion junction of contemporary ceramic‐on‐ceramic hips shown in a multistation hip simulator

Comparison of Ceramic-on-Ceramic vs. Ceramic-on-Polyethylene for Primary Total Hip Arthroplasty: A Meta-Analysis of 15 Randomized Trials

Comprehensive analysis of geometrical parameters of crosshatched texture for enhanced tribological performance under biological environment

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