The effects of contact area and contact stress on friction and wear of polyethylene-metal articulation were evaluated using a bidirectional pin-on-disk apparatus. A doubling of the contact area under fixed loading conditions led to a 50% increase in the coefficient of friction and a doubling of the wear rate. There appeared to be a relationship between the increase in wear rate and the increase in the coefficient of friction. A model was developed to explain the mechanism by which engagement of asperities results in the increasing wear rate with increasing contact area despite the decreased stress.

1.
Muratoglu
,
O. K.
,
Bragdon
,
C. R.
,
O’Connor
,
D. O.
,
Jasty
,
M.
,
Harris
,
W. H.
,
Gul
,
R.
, and
McGarry
,
F.
, 1999, “
Unified Wear Model for Highly Crosslinked Ultra-High Molecular Weight Polyethylenes (UHMWPE)
,”
Biomaterials
0142-9612,
20
(
16
), pp.
1463
1470
.
2.
Sathasivam
,
S.
,
Walker
,
P. S.
,
Campbell
,
P. A.
, and
Rayner
,
K.
, 2001, “
The Effect of Contact Area on Wear in Relation to Fixed Bearing and Mobile Bearing Knee Replacements
,”
J. Biomed. Mater. Res.
0021-9304,
58
(
3
), pp.
282
290
.
3.
Saikko
,
V.
, and
Ahlroos
,
T.
, 1999, “
Type of Motion and Lubricant in Wear Simulation of Polyethylene Acetabular Cup
,”
Proc. Inst. Mech. Eng., Part H: J. Eng. Med.
0954-4119,
213
(
4
), pp.
301
310
.
4.
Saikko
,
V.
, 1998, “
A Multidirectional Motion Pin-on-Disk Wear Test Method for Prosthetic Joint Materials
,”
J. Biomed. Mater. Res.
0021-9304,
41
(
1
), pp.
58
64
.
5.
Saikko
,
V.
, and
Ahlroos
,
T.
, 2000, “
Wear Simulation of UHMWPE for Total Hip Replacement with a Multidirectional Motion Pin-on-Disk Device: Effects of Counterface Material, Contact Area, and Lubricant
,”
J. Biomed. Mater. Res.
0021-9304,
49
(
2
), pp.
147
154
.
6.
Derbyshire
,
B.
,
Fisher
,
J.
,
Dowson
,
D.
,
Hardaker
,
C.
, and
Brummitt
,
K.
, 1994, “
Comparative Study of the Wear of UHMWPE With Zirconia Ceramic and Stainless Steel Femoral Heads in Artificial Hip Joints
,”
Med. Eng. Phys.
1350-4533,
16
(
3
), pp.
229
236
.
7.
Bragdon
,
C.
,
O’Connor
,
D.
,
Lowenstein
,
J.
, and
Syniuta
,
W.
, 1996, “
The Importance of Multidirectional Motion on the Wear of Polyethylene
,”
Proc. Inst. Mech. Eng., Part H: J. Eng. Med.
0954-4119,
210
(
3
), pp.
157
165
.
8.
Wang
,
A.
, 2001, “
A Unified Theory of Wear for Ultra-High Molecular Weight Polyethylene in Multi-Directional Sliding
,”
Wear
0043-1648,
248
, pp.
38
47
.
9.
Archard
,
J. F.
, 1953, “
Contact and Rubbing of Flat Surfaces
,”
J. Appl. Phys.
0021-8979,
24
(
8
), pp.
981
988
.
10.
Lewis
,
R. B.
, 1964, “
Predicting Wear on Sliding Plastic Surfaces
,”
Mech. Eng. (Am. Soc. Mech. Eng.)
0025-6501,
86
, pp.
32
35
.
11.
Atkinson
,
J.
,
Dowson
,
D.
, and
Wroblewski
,
B.
, 1985, “
Laboratory Wear Tests and Clinical Observations of the Penetration of Femoral Heads Into Acetabular Cups in Total Replacement Hip Joints. III. The Measurement of Internal Volume Changes in Explanted Charnley Sockets After 2-16years In Vivo and the Determination of Wear Factors.
,”
Wear
0043-1648,
104
, pp.
225
244
.
12.
Hall
,
R. M.
,
Unsworth
,
A.
,
Siney
,
P.
, and
Wroblewski
,
B. M.
, 1996, “
Wear in Retrieved Charnley Acetabular Sockets
,”
Proc. Inst. Mech. Eng., Part H: J. Eng. Med.
0954-4119,
210
(
3
), pp.
197
207
.
13.
Rostoker
,
W.
, and
Galante
,
J. O.
, 1979, “
Contact Pressure Dependence of Wear Rates of Ultra High Molecular Weight Polyethylene
,”
J. Biomed. Mater. Res.
0021-9304,
13
(
6
), pp.
957
964
.
14.
Rose
,
R.
,
Goldfarb
,
H.
,
Ellis
,
E.
, and
Crugnola
,
A.
, 1983, “
On the Pressure Dependence of Wear of UHMWPE
,”
Wear
0043-1648,
92
, pp.
99
111
.
15.
Good
,
V. D.
, 2001, “
The Tribological Significance of the Joint Fluid Analog in a Hip Joint Simulator
,” Ph.D. thesis, Department of Bioengineering, University of Strathclyde, Glasgow.
16.
Livermore
,
J.
,
Ilstrup
,
D.
, and
Morrey
,
B.
, 1990, “
Effect of Femoral Head Size on Wear of the Polyethylene Acetabular Component
,”
J. Bone Jt. Surg., Am. Vol.
0021-9355,
72
(
4
), pp.
518
528
.
17.
Wang
,
A.
,
Essner
,
A.
, and
Klein
,
R.
, 2001, “
Effect of Contact Stress on Friction and Wear of Ultra-High Molecular Weight Polyethylene in Total Hip Replacement
,”
Proc. Inst. Mech. Eng., Part H: J. Eng. Med.
0954-4119,
215
(
2
), pp.
133
139
.
18.
Mazzucco
,
D.
, and
Spector
,
M.
, 2003, “
Effects of Contact Area and Stress on the Volumetric Wear of Ultrahigh Molecular Weight Polyethylene
,”
Wear
0043-1648,
254
(
5–6
), pp.
514
522
.
19.
Kabo
,
J. M.
,
Gebhard
,
J. S.
,
Loren
,
G.
, and
Amstutz
,
H. C.
, 1993, “
In Vivo Wear of Polyethylene Acetabular Components
,”
J. Bone Jt. Surg., Br. Vol.
0301-620X,
75
(
2
), pp.
254
258
.
20.
Suh
,
N.
, 1986,
Tribophysics
,
Prentice-Hall
, Englewood Cliffs, NJ.
21.
Dintenfass
,
L.
, 1963, “
Lubrication in Synovial Joints: A Theoretical Analysis
,”
J. Bone Jt. Surg., Am. Vol.
0021-9355,
45A
(
6
), pp.
1241
1256
.
22.
Komvopoulos
,
K.
,
Saka
,
N.
, and
Suh
,
N.
, 1985, “
The Mechanism of Friction in Boundary Lubrication
,”
ASME J. Tribol.
0742-4787,
107
, pp.
452
462
.
23.
Hsu
,
G.
,
Yagle
,
A. E.
,
Ludema
,
K. C.
, and
Levitt
,
J. A.
, 2000, “
Modeling and Identification of Lubricated Polymer Friction Dynamics
,”
J. Dyn. Syst., Meas., Control
0022-0434,
122
(
1
), pp.
78
88
.
24.
Stachowiak
,
G.
, and
Batchelor
,
A
, 2001,
Engineering Tribology
,
2nd Edition
,
Elsevier
, Boston.
25.
Allan
,
A. J.
, 1958, “
Plastics as Solid Lubricants and Bearings
,”
Lubr. Eng.
0024-7154,
14
, pp.
211
215
.
26.
Pinchbeck
,
P. H.
, 1962, “
A Review of Plastic Bearings
,”
Wear
0043-1648,
5
, pp.
85
113
.
27.
Hills
,
B. A.
, 1995, “
Remarkable Anti-Wear Properties of Joint Surfactant
,”
Ann. Biomed. Eng.
0090-6964,
23
(
2
), pp.
112
115
.
28.
Briscoe
,
B. J.
, and
Tabor
,
D.
, 1978, “
Shear Properties of Thin Polymeric Films
,”
J. Adhes.
0021-8464,
9
, pp.
145
155
.
29.
Cooper
,
J. R.
,
Dowson
,
D.
, and
Fisher
,
J.
, 1993, “
The Effect of Transfer Film and Surface Roughness on the Wear of Lubricated UHMWPE
,”
Clin Mat
,
14
, pp.
295
302
.
30.
Saikko
,
V.
,
Calonius
,
O.
, and
Keranen
,
J.
, 2001, “
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
,”
J. Biomed. Mater. Res.
0021-9304,
57
(
4
), pp.
506
512
.
31.
Suh
,
N.
, 1977, “
An Overview of the Delamination Theory of Wear
,”
Wear
0043-1648,
44
, pp.
1
16
.
32.
Collier
,
J. P.
,
Mayor
,
M. B.
,
Jensen
,
R. E.
,
Surprenant
,
V. A.
,
Surprenant
,
H. P.
,
McNamar
,
J. L.
, and
Belec
,
L.
, 1992, “
Mechanisms of Failure of Modular Prostheses
,”
Clin. Orthop. Relat. Res.
0009-921X,
285
, pp.
129
139
.
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