Frictional effects between natural teeth in an artificial mouth

W. H. Douglas, Ronald Sakaguchi, R. DeLong

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A method for measuring frictional forces on enamel of natural teeth and restorative materials was developed using the Artificial Oral Environment. Enamel/enamel systems were tested using different oral fluids in a minienvironmental chamber capable of introducing biologic fluids between the occluding surfaces. Matched, extracted opposing human premolars mounted in physiologic occlusion under an occlusal load of 3 pounds were bruxed at approximate masticatory velocities. A load cell measured the resulting horizontal forces and an X-Y record was attained. 31 independent measurements of friction in both buccal and lingual directions were performed with the teeth dry, and with human saliva, Xerolube, and distilled water intervening. It was found that typical values for enamel/enamel coefficients of friction, μ, were in the range of 0.1-0.42. μ was independent of different fluids within any one enamel/enamel couple (coefficient of variation was typically 10%). However, the coefficient of friction of the enamel pair was highly dependent on surface texture. Roughening virgin enamel led to a 3 fold increase in μ. Conversely surfactants present in mineral oil reduced the friction of roughened enamel by 3 fold. Where the wear process is by abrasion it is likely that the reduction of the tangential forces due to friction could lead to reduced loss of contour. It is likely that finishing procedures in dentistry are important in this process. Finally, the production of low friction restorative materials are clearly indicated as a future development.

Original languageEnglish (US)
Pages (from-to)115-119
Number of pages5
JournalDental Materials
Volume1
Issue number3
DOIs
StatePublished - 1985
Externally publishedYes

Fingerprint

Artificial Teeth
Enamels
Dental Enamel
Mouth
Friction
Fluids
Tooth
Dentistry
Friction materials
Mineral Oil
Cheek
Mineral oils
Bicuspid
Saliva
Tongue
Abrasion
Surface-Active Agents
Surface active agents
Textures

Keywords

  • artificial oral environment
  • coefficient of friction
  • enamel
  • friction
  • saliva
  • wear

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Dentistry(all)

Cite this

Frictional effects between natural teeth in an artificial mouth. / Douglas, W. H.; Sakaguchi, Ronald; DeLong, R.

In: Dental Materials, Vol. 1, No. 3, 1985, p. 115-119.

Research output: Contribution to journalArticle

Douglas, W. H. ; Sakaguchi, Ronald ; DeLong, R. / Frictional effects between natural teeth in an artificial mouth. In: Dental Materials. 1985 ; Vol. 1, No. 3. pp. 115-119.
@article{7ab3f19014824bfb8c11b46d624acc04,
title = "Frictional effects between natural teeth in an artificial mouth",
abstract = "A method for measuring frictional forces on enamel of natural teeth and restorative materials was developed using the Artificial Oral Environment. Enamel/enamel systems were tested using different oral fluids in a minienvironmental chamber capable of introducing biologic fluids between the occluding surfaces. Matched, extracted opposing human premolars mounted in physiologic occlusion under an occlusal load of 3 pounds were bruxed at approximate masticatory velocities. A load cell measured the resulting horizontal forces and an X-Y record was attained. 31 independent measurements of friction in both buccal and lingual directions were performed with the teeth dry, and with human saliva, Xerolube, and distilled water intervening. It was found that typical values for enamel/enamel coefficients of friction, μ, were in the range of 0.1-0.42. μ was independent of different fluids within any one enamel/enamel couple (coefficient of variation was typically 10{\%}). However, the coefficient of friction of the enamel pair was highly dependent on surface texture. Roughening virgin enamel led to a 3 fold increase in μ. Conversely surfactants present in mineral oil reduced the friction of roughened enamel by 3 fold. Where the wear process is by abrasion it is likely that the reduction of the tangential forces due to friction could lead to reduced loss of contour. It is likely that finishing procedures in dentistry are important in this process. Finally, the production of low friction restorative materials are clearly indicated as a future development.",
keywords = "artificial oral environment, coefficient of friction, enamel, friction, saliva, wear",
author = "Douglas, {W. H.} and Ronald Sakaguchi and R. DeLong",
year = "1985",
doi = "10.1016/S0109-5641(85)80040-3",
language = "English (US)",
volume = "1",
pages = "115--119",
journal = "Dental Materials",
issn = "0109-5641",
publisher = "Elsevier Science",
number = "3",

}

TY - JOUR

T1 - Frictional effects between natural teeth in an artificial mouth

AU - Douglas, W. H.

AU - Sakaguchi, Ronald

AU - DeLong, R.

PY - 1985

Y1 - 1985

N2 - A method for measuring frictional forces on enamel of natural teeth and restorative materials was developed using the Artificial Oral Environment. Enamel/enamel systems were tested using different oral fluids in a minienvironmental chamber capable of introducing biologic fluids between the occluding surfaces. Matched, extracted opposing human premolars mounted in physiologic occlusion under an occlusal load of 3 pounds were bruxed at approximate masticatory velocities. A load cell measured the resulting horizontal forces and an X-Y record was attained. 31 independent measurements of friction in both buccal and lingual directions were performed with the teeth dry, and with human saliva, Xerolube, and distilled water intervening. It was found that typical values for enamel/enamel coefficients of friction, μ, were in the range of 0.1-0.42. μ was independent of different fluids within any one enamel/enamel couple (coefficient of variation was typically 10%). However, the coefficient of friction of the enamel pair was highly dependent on surface texture. Roughening virgin enamel led to a 3 fold increase in μ. Conversely surfactants present in mineral oil reduced the friction of roughened enamel by 3 fold. Where the wear process is by abrasion it is likely that the reduction of the tangential forces due to friction could lead to reduced loss of contour. It is likely that finishing procedures in dentistry are important in this process. Finally, the production of low friction restorative materials are clearly indicated as a future development.

AB - A method for measuring frictional forces on enamel of natural teeth and restorative materials was developed using the Artificial Oral Environment. Enamel/enamel systems were tested using different oral fluids in a minienvironmental chamber capable of introducing biologic fluids between the occluding surfaces. Matched, extracted opposing human premolars mounted in physiologic occlusion under an occlusal load of 3 pounds were bruxed at approximate masticatory velocities. A load cell measured the resulting horizontal forces and an X-Y record was attained. 31 independent measurements of friction in both buccal and lingual directions were performed with the teeth dry, and with human saliva, Xerolube, and distilled water intervening. It was found that typical values for enamel/enamel coefficients of friction, μ, were in the range of 0.1-0.42. μ was independent of different fluids within any one enamel/enamel couple (coefficient of variation was typically 10%). However, the coefficient of friction of the enamel pair was highly dependent on surface texture. Roughening virgin enamel led to a 3 fold increase in μ. Conversely surfactants present in mineral oil reduced the friction of roughened enamel by 3 fold. Where the wear process is by abrasion it is likely that the reduction of the tangential forces due to friction could lead to reduced loss of contour. It is likely that finishing procedures in dentistry are important in this process. Finally, the production of low friction restorative materials are clearly indicated as a future development.

KW - artificial oral environment

KW - coefficient of friction

KW - enamel

KW - friction

KW - saliva

KW - wear

UR - http://www.scopus.com/inward/record.url?scp=0022073948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0022073948&partnerID=8YFLogxK

U2 - 10.1016/S0109-5641(85)80040-3

DO - 10.1016/S0109-5641(85)80040-3

M3 - Article

C2 - 3861435

AN - SCOPUS:0022073948

VL - 1

SP - 115

EP - 119

JO - Dental Materials

JF - Dental Materials

SN - 0109-5641

IS - 3

ER -