Surface roughness of retrieved CoCrMo alloy femoral components from PCA artificial total knee joints

Que, Like; Topoleski, L. D. Timmie; Parks, Nancy L.

doi:10.1002/(sici)1097-4636(2000)53:1<111::aid-jbm15>3.3.co;2-p

Cited by 2 publications

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“…As stated in published review works [52], the sliding velocity and applied loading used in this paper are similar to those of implanted joints. Furthermore, because the properties of diluted bovine serum bear a great similarity to that of synovial fluids [61], the testing conditions in this paper could be regarded as a simplified in-vivo environment. Thus, the trendline derived under the serum-lubricated test could provide us some insights into designing and fabricating artificial joints.…”

Section: Coefficient Of Friction Under Serum-lubricated Conditionmentioning

confidence: 99%

Tribological study on the surface modification of metal-on-polymer bioimplants

et al. 2022

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The tribological performance of artificial joints is regarded as the main factor of the lifespan of implanted prostheses. The relationship between surface roughness and coefficient of friction (COF) under dry and lubricated conditions is studied. Results show that under dry test, friction coefficient is not reduced all the time with a decrease in surface roughness. On the contrary, a threshold of roughness value is observed, and frictional force increases again below this value. This critical value lies between 40 and 100 nm in Sa (roughness). This phenomenon is due to the transfer of friction mechanisms from abrasion to adhesion. Under wet test, COF always decreases with reduction in surface roughness. This result is mainly attributed to the existence of a thin layer of lubricant film that prevents the intimate contact of two articulating surfaces, thus greatly alleviating adhesion friction. Furthermore, surface texturing technology is successful in improving the corresponding tribological performance by decreasing friction force and mitigating surface deterioration. The even-distribution mode of texturing patterns is most suitable for artificial joints. By obtaining the optimal surface roughness and applying texturing technology, the tribological performance of polymer-based bioimplants can be greatly enhanced.

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Section: Coefficient Of Friction Under Serum-lubricated Conditionmentioning

confidence: 99%

Tribological study on the surface modification of metal-on-polymer bioimplants

et al. 2022

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“…It has been reported that the wear rate of PE increases due to the presence of scratches on the counterface and the presence of third‐body particles such as bone chips, bone cement, metal beads, broken wires, particles of bone, and other wear debris . It has been found that crosslinking with irradiation has improved the wear resistance of conventional UHMWPE, with a concomitant reduction in mechanical properties such as ultimate tensile strength, ductility, fracture toughness, and fatigue crack propagation resistance .…”

Section: Introductionmentioning

confidence: 99%

Wear of Biopolymers under Reciprocating Sliding Conditions against Different Counterfaces

Harsha

Wäsche

Joyce

2019

Polymer Engineering & Sci

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The objective of this study was to investigate the wear resistance of ultrahigh‐molecular weight polyethylene (UHMWPE) and crosslinked polyethylene (XLPE) against different counterfaces. Friction and wear studies were evaluated under dry reciprocating sliding conditions at room temperature. Ti6Al4V discs finished in polished, lapped, and ground conditions were reciprocated against polymer cylinders. In addition, abrasive wear studies were conducted using different abrasive grit sizes. The friction and wear properties of the two polyethylenes were strongly affected by the different counterfaces. XLPE showed important friction and wear sensitivity with the change of surface roughness of the Ti6Al4V disc, as well as with the change in abrasive grit size. Scanning electron microscopy and energy‐dispersive X‐ray (EDX) analysis of the worn disc surfaces and the polymer pins indicated the wear mechanisms affecting the polyethylenes. POLYM. ENG. SCI., 59:2356–2366, 2019. © 2019 Society of Plastics Engineers

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Surface roughness of retrieved CoCrMo alloy femoral components from PCA artificial total knee joints

Cited by 2 publications

References 0 publications

Tribological study on the surface modification of metal-on-polymer bioimplants

Tribological study on the surface modification of metal-on-polymer bioimplants

Wear of Biopolymers under Reciprocating Sliding Conditions against Different Counterfaces

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