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

Saikko, Vesa

doi:10.1002/(sici)1097-4636(199807)41:1<58::aid-jbm7>3.3.co;2-u

Cited by 19 publications

(34 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…21 In the present device, loading was done with a weight, and pin guiding by a double-cantilever beam made from two thin strips of spring steel. 9 Presumably, the vibrations contributed to the crushing of the loosened grains. Vibrations are an essential, 21 but so far mostly neglected, issue in wear testing.…”

Section: Discussionmentioning

confidence: 99%

“…1(b)), albeit more scratched, and the R a value dropped to 0.03 Ϯ 0.01 m. The tests were done with a CTPOD device described in detail elsewhere. 9 The principal original characteristic of the device was that the pin translated, without rotation, along a circular track of 10 mm diameter on the disk, which made the direction of sliding change continually relative to the pin. This was shown to be a key issue in producing a realistic hip wear simulation for ultrahigh molecular weight polyethylene.…”

Section: Methodsmentioning

confidence: 99%

“…This was shown to be a key issue in producing a realistic hip wear simulation for ultrahigh molecular weight polyethylene. 9 One lap is called a cycle, in conformity with hip simulator tests. The sliding distance was 31.4 mm/cycle.…”

Section: Methodsmentioning

confidence: 99%

“…10 In ordinary reciprocating and unidirectionally rotating pin-on-disk devices, unidirectional grooving does occur. 9,11 The CTPOD device has produced a realistic hip wear simulation for ultrahigh molecular weight polyethylene. 9 The present study was done to evaluate the applicability of the CTPOD principle to the hip wear simulation of alumina-on-alumina, using specimens made of Biolox forte alumina.…”

Section: Introductionmentioning

confidence: 99%

“…9,11 The CTPOD device has produced a realistic hip wear simulation for ultrahigh molecular weight polyethylene. 9 The present study was done to evaluate the applicability of the CTPOD principle to the hip wear simulation of alumina-on-alumina, using specimens made of Biolox forte alumina. Although the wear of state-of-the-art alumina-on-alumina articulations, such as Biolox forte against itself, is generally low, it has not been shown that the wear is clinically insignificant.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Wear Simulation of Alumina‐on‐Alumina Prosthetic Hip Joints Using a Multidirectional Motion Pin‐on‐Disk Device

Saikko¹,

Keränen

2002

Journal of the American Ceramic Society

Self Cite

View full text Add to dashboard Cite

The wear of a state‐of‐the‐art implant alumina against itself was studied with a circularly translating pin‐on‐disk (CTPOD) device, a wear simulator for prosthetic hip joint materials. The direction of sliding changed continually relative to the pin, preventing erroneous uniaxial grooving typical of ordinary pin‐on‐disk devices. The dominating wear mechanism was mild abrasion manifested as a relieflike surface, which agreed with clinical findings. The wear factor ranged from 1 × 10−8 to 6 × 10−8 mm3/(N·m). The CTPOD device, validated earlier for ultrahigh molecular weight polyethylene, was shown to be the first simple wear test device to produce wear similar to that known to occur clinically in alumina‐on‐alumina total hip prostheses.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wear Simulation of Alumina‐on‐Alumina Prosthetic Hip Joints Using a Multidirectional Motion Pin‐on‐Disk Device

Saikko¹,

Keränen

2002

Journal of the American Ceramic Society

Self Cite

View full text Add to dashboard Cite

show abstract

Effect of counterface roughness on the wear of conventional and crosslinked ultrahigh molecular weight polyethylene studied with a multi-directional motion pin-on-disk device

Saikko¹,

Calonius²,

Keränen

2001

J. Biomed. Mater. Res.

Self Cite

View full text Add to dashboard Cite

The effect of counterface roughness on the wear of conventional gamma-sterilized, and electron-beam-crosslinked ultrahigh molecular weight polyethylene was studied with a circularly translating pin-on-disk device. The counterfaces, CoCr disks, were either polished, or roughened so that they represented the type of roughening and the range of surface roughness values (R(a) = 0.014-0.24 microm) observed in explanted femoral heads of total hip prostheses. The lubricant was diluted calf serum, and the test length 3 million cycles. A total of 24 tests were done. With both types of polyethylene, there was a strong correlation between R(a) and wear factor k. The power equations were k = 5.87 x 10(-5)(R(a))(0.91) for conventional polyethylene (R(2) = 0.94), and k = 7.87 x 10(-5)(R(a))(2.49) for crosslinked polyethylene (R(2) = 0.82). Crosslinking improved wear resistance significantly. The wear of crosslinked polyethylene against the roughest counterfaces was lower than the wear of conventional polyethylene against the polished counterfaces. Against rough counterfaces, the wear of crosslinked polyethylene was an order of magnitude lower than that of conventional polyethylene. On the crosslinked polyethylene pins that were tested against polished counterfaces, remains of original machining marks were still visible after the test. The average size of wear particles produced by both types of polyethylene against rough counterfaces was similar, 0.4 microm, whereas that produced by conventional and crosslinked polyethylene against polished counterfaces was significantly smaller, 0.2 and 0.1 microm, respectively.

show abstract

The effects of presence of a backside screw hole on biotribological behavior of phospholipid polymer‐grafted crosslinked polyethylene

et al. 2017

View full text Add to dashboard Cite

One of the important factors in determining the success of joint replacement is the wear performance of polyethylene. Although highly crosslinked polyethylene (CLPE) is presently used, it is still not adequate. We have developed a surface modification technology using poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) in an attempt to improve wear performance. In this study, we evaluated the wear and creep deformation resistances of 3-mm and 6-mm thick PMPC-grafted CLPE disks, set on a metal back-plate, with and without a sham screw hole. The gravimetric wear and volumetric change of the disks were examined using a multidirectional pin-on-disk tester. PMPC grafting decreased the gravimetric wear of CLPE regardless of the presence of a screw hole, and did not affect the volumetric change. The volumetric change in the bearing and backside surfaces of the 3-mm thick disk with a screw hole was much larger than that of those without a screw hole or those of the 6-mm thick disk, which was caused by creep deformation. PMPC grafting on the bearing surface can be a material engineering approach to reduce the wear without changing the creep deformation resistance, and is a promising surface modification technology that can be used to increase the longevity of various artificial joints. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 610-618, 2018.

show abstract

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

Cited by 19 publications

References 13 publications

Wear Simulation of Alumina‐on‐Alumina Prosthetic Hip Joints Using a Multidirectional Motion Pin‐on‐Disk Device

Wear Simulation of Alumina‐on‐Alumina Prosthetic Hip Joints Using a Multidirectional Motion Pin‐on‐Disk Device

Effect of counterface roughness on the wear of conventional and crosslinked ultrahigh molecular weight polyethylene studied with a multi-directional motion pin-on-disk device

The effects of presence of a backside screw hole on biotribological behavior of phospholipid polymer‐grafted crosslinked polyethylene

Contact Info

Product

Resources

About