Wear of prosthetic joint materials in various lubricants

Ahlroos, Tiina; Saikko, Vesa

doi:10.1016/s0043-1648(97)00074-4

Cited by 45 publications

(31 citation statements)

References 19 publications

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“…The pins were from the same manufacture Correspondence to: V. Saikko; e-mail: vesa.saikko@hut.fi Contract grant sponsor: Academy of Finland batch as those used in the earlier pin-on-disk studies. [17][18][19] The diameter of the cylindrical pins was 9 mm, but the end of the pin was chamfered at an angle of 60 degrees so that the initial diameter of the flat wear face was 3.0 mm. Due to this common truncated cone shape, the nominal contact area naturally increased with wear, and the nominal contact pressure decreased from the initial value when the wear was substantial (Fig.…”

Section: Pinsmentioning

confidence: 99%

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Saikko

1998

J. Biomed. Mater. Res.

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112

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A realistic pin-on-disk wear test method for prosthetic joint materials has been developed. The new method, called circularly translating pin-on-disk (CTPOD), yields wear rates and wear mechanisms similar to those observed in retrieved polyethylene acetabular cups. In the established methods, where a polyethylene specimen slides against a unidirectionally rotating, or reciprocating, metallic or ceramic counterface, the wear rate typically is two orders of magnitude too low. In the present study, also, the reciprocator gave negligible wear. In the CTPOD method, considerable wear occurs because the direction of sliding rotates relative to the polyethylene pin, hence, the molecular orientation effect of polyethylene is avoided.

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Section: Pinsmentioning

confidence: 99%

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Saikko

1998

J. Biomed. Mater. Res.

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112

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“…Friction-wear tests for artificial joints are conducted between a ultra-high molecular weight polyethylene and a metal to evaluate, for example, the wear-resistant performance of a modified polyethylene, 6) an ion implanted metal 7) and a lubricant with protein. 8) However, friction-wear test between metal and metal under a quasi-biological environment was not performed according to the best knowledge of the authors. Difficulty in friction-wear test between metal and metal due to unsymmetrical wear and friction heating is predicted.…”

Section: Introductionmentioning

confidence: 99%

Friction-Wear Properties of Nickel-Free Co–Cr–Mo Alloy in a Simulated Body Fluid

et al. 2005

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Friction-wear properties of a Co-29 mass%Cr-6 mass%Mo alloy (ASTM F799-95) but reducing the amount of nickel were evaluated with friction-wear test using a pin-on-flat type reciprocating friction tester in air and phosphate buffered saline, PBS(À), as a quasi-biological environment under applied stress of 1.0, 3.5 and 5.0 MPa to understand the performance of this alloy for metal-on-metal type artificial hip joints. In addition, metal ions dissolved in PBS(À) after the test was quantified. As a result, wear loss in PBS(À) is much smaller than that in air and increases with the increase of applied stress in both air and PBS(À), while the coefficient of friction in steady state during the test is larger in PBS(À) than in air, according to lubrication behavior of wear debris and PBS(À). Wear damage in PBS(À) is smaller than that in air, however more small scale of irregularity is observed in PBS(À) than that in air. Nickel and molybdenum are preferentially dissolved during the test.

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“…There are many published papers that discuss possible alternatives to bovine serum [11][12][13][14][15][16][17][18] but the search for an alternative lubricant still continues. It is well understood that any proposed alternative lubricant will need to be safe; produce wear rates and particles that match those produced in the body; and be cost effective with no ethical limitations.…”

Section: Introductionmentioning

confidence: 99%

Potential Synthetic Biolubricant as an Alternative to Bovine Serum

et al. 2016

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Abstract:It is crucial that orthopaedic implant materials are tested in conditions that replicate the natural body's environment as closely as possible. Bovine serum is currently recommended for use by the International Organisation for Standardisation (ISO) for the wear testing of these implant materials, however, the rheological properties of bovine serum do not match fully those of the body's natural lubricant, synovial fluid. This study looks at a potential alternative to bovine serum for the testing of orthopaedic implant materials; 0.5% gellan gum fluid gel. Wear tests using multidirectional motion were conducted on ultra-high molecular weight polyethylene (UHMWPE) pins rubbing against stainless steel plates. Roughness measurements were performed during testing along with particle analysis of the testing lubricant. At two million cycles (equivalent to 121.3 km of sliding), the mean wear factor for the four UHMWPE pins was 0.25 (standard deviation (SD) 0.03) × 10 −6 mm 3 /Nm and there was no evidence of any transfer film on the plate surfaces. The wear factor produced by 0.5% gellan gum fluid gel was lower than that measured in previous studies using bovine serum as the lubricant but greater than the wear factor shown in published work using a similar alternative lubricant (sodium alginate mixed with gellan gum). Work on the development of a suitable alternative lubricant to bovine serum will continue.

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Wear of prosthetic joint materials in various lubricants

Cited by 45 publications

References 19 publications

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Friction-Wear Properties of Nickel-Free Co–Cr–Mo Alloy in a Simulated Body Fluid

Potential Synthetic Biolubricant as an Alternative to Bovine Serum

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Wear of prosthetic joint materials in various lubricants

Cited by 45 publications

References 19 publications

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Friction-Wear Properties of Nickel-Free Co&ndash;Cr&ndash;Mo Alloy in a Simulated Body Fluid

Potential Synthetic Biolubricant as an Alternative to Bovine Serum

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Friction-Wear Properties of Nickel-Free Co–Cr–Mo Alloy in a Simulated Body Fluid