The role of lubricant entrapment at biological interfaces: Reduction of friction and adhesion in articular cartilage

S. M T Chan, C. P. Neu, K. Komvopoulos, A Hari Reddi

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Friction and adhesion of articular cartilage from high- and low-load-bearing regions of bovine knee joints were examined with a tribometer under various loads and equilibration times. The effect of trapped lubricants was investigated by briefly unloading the cartilage sample before friction testing, to allow fluid to reflow into the contact interface and boundary lubricants to rearrange. Friction and adhesion of high-load-bearing joint regions were consistently lower than those of low-load-bearing regions. This investigation is the first to demonstrate the regional variation in the friction and adhesion properties of articular cartilage. Friction coefficient decreased with increasing contact pressure and decreasing equilibration time. Briefly unloading cartilage before the onset of sliding resulted in significantly lower friction and adhesion and a loss of the friction dependence on contact pressure, suggesting an enhancement of the cartilage tribological properties by trapped lubricants. The results of this study reveal significant differences in the friction and adhesion properties between high- and low-load-bearing joint regions and elucidate the role of trapped lubricants in cartilage tribology.

Original languageEnglish (US)
Pages (from-to)2015-2020
Number of pages6
JournalJournal of Biomechanics
Volume44
Issue number11
DOIs
StatePublished - Jul 28 2011

Fingerprint

Lubricants
Friction
Cartilage
Articular Cartilage
Bearings (structural)
Adhesion
Weight-Bearing
Unloading
Joints
Pressure
Tribology
Knee Joint
Contacts (fluid mechanics)
Fluids
Testing

Keywords

  • Adhesion
  • Articular cartilage
  • Boundary film
  • Friction
  • Lubrication

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Rehabilitation
  • Biophysics
  • Biomedical Engineering

Cite this

The role of lubricant entrapment at biological interfaces : Reduction of friction and adhesion in articular cartilage. / Chan, S. M T; Neu, C. P.; Komvopoulos, K.; Reddi, A Hari.

In: Journal of Biomechanics, Vol. 44, No. 11, 28.07.2011, p. 2015-2020.

Research output: Contribution to journalArticle

@article{1dafc3447ea54b04bf04e41a32f71f39,
title = "The role of lubricant entrapment at biological interfaces: Reduction of friction and adhesion in articular cartilage",
abstract = "Friction and adhesion of articular cartilage from high- and low-load-bearing regions of bovine knee joints were examined with a tribometer under various loads and equilibration times. The effect of trapped lubricants was investigated by briefly unloading the cartilage sample before friction testing, to allow fluid to reflow into the contact interface and boundary lubricants to rearrange. Friction and adhesion of high-load-bearing joint regions were consistently lower than those of low-load-bearing regions. This investigation is the first to demonstrate the regional variation in the friction and adhesion properties of articular cartilage. Friction coefficient decreased with increasing contact pressure and decreasing equilibration time. Briefly unloading cartilage before the onset of sliding resulted in significantly lower friction and adhesion and a loss of the friction dependence on contact pressure, suggesting an enhancement of the cartilage tribological properties by trapped lubricants. The results of this study reveal significant differences in the friction and adhesion properties between high- and low-load-bearing joint regions and elucidate the role of trapped lubricants in cartilage tribology.",
keywords = "Adhesion, Articular cartilage, Boundary film, Friction, Lubrication",
author = "Chan, {S. M T} and Neu, {C. P.} and K. Komvopoulos and Reddi, {A Hari}",
year = "2011",
month = "7",
day = "28",
doi = "10.1016/j.jbiomech.2011.04.015",
language = "English (US)",
volume = "44",
pages = "2015--2020",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "11",

}

TY - JOUR

T1 - The role of lubricant entrapment at biological interfaces

T2 - Reduction of friction and adhesion in articular cartilage

AU - Chan, S. M T

AU - Neu, C. P.

AU - Komvopoulos, K.

AU - Reddi, A Hari

PY - 2011/7/28

Y1 - 2011/7/28

N2 - Friction and adhesion of articular cartilage from high- and low-load-bearing regions of bovine knee joints were examined with a tribometer under various loads and equilibration times. The effect of trapped lubricants was investigated by briefly unloading the cartilage sample before friction testing, to allow fluid to reflow into the contact interface and boundary lubricants to rearrange. Friction and adhesion of high-load-bearing joint regions were consistently lower than those of low-load-bearing regions. This investigation is the first to demonstrate the regional variation in the friction and adhesion properties of articular cartilage. Friction coefficient decreased with increasing contact pressure and decreasing equilibration time. Briefly unloading cartilage before the onset of sliding resulted in significantly lower friction and adhesion and a loss of the friction dependence on contact pressure, suggesting an enhancement of the cartilage tribological properties by trapped lubricants. The results of this study reveal significant differences in the friction and adhesion properties between high- and low-load-bearing joint regions and elucidate the role of trapped lubricants in cartilage tribology.

AB - Friction and adhesion of articular cartilage from high- and low-load-bearing regions of bovine knee joints were examined with a tribometer under various loads and equilibration times. The effect of trapped lubricants was investigated by briefly unloading the cartilage sample before friction testing, to allow fluid to reflow into the contact interface and boundary lubricants to rearrange. Friction and adhesion of high-load-bearing joint regions were consistently lower than those of low-load-bearing regions. This investigation is the first to demonstrate the regional variation in the friction and adhesion properties of articular cartilage. Friction coefficient decreased with increasing contact pressure and decreasing equilibration time. Briefly unloading cartilage before the onset of sliding resulted in significantly lower friction and adhesion and a loss of the friction dependence on contact pressure, suggesting an enhancement of the cartilage tribological properties by trapped lubricants. The results of this study reveal significant differences in the friction and adhesion properties between high- and low-load-bearing joint regions and elucidate the role of trapped lubricants in cartilage tribology.

KW - Adhesion

KW - Articular cartilage

KW - Boundary film

KW - Friction

KW - Lubrication

UR - http://www.scopus.com/inward/record.url?scp=79960263865&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960263865&partnerID=8YFLogxK

U2 - 10.1016/j.jbiomech.2011.04.015

DO - 10.1016/j.jbiomech.2011.04.015

M3 - Article

C2 - 21679953

AN - SCOPUS:79960263865

VL - 44

SP - 2015

EP - 2020

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 11

ER -