Surface Modification of Orthodontic Bracket Models via Ion Implantation: Effect on Coefficients of Friction

Abstract

In an effort to reduce the unwanted effects of friction, ion implantation of bracket models was accomplished and tested against the four major orthodontic alloy groups, stainless steel (S.S.), cobalt-chromium (Co-Cr), nickel-titanium (NiTi), and beta-titanium. Stainless steel right-hand cylinders simulated orthodontic brackets. In addition to control samples, the polished faces of these cylinders were implanted with N+, Ti+/N+, N+/C+, N+/Cr+, Ti+, Ti+/C+, and C+. Frictional forces were measured, and both the coefficient of static friction, mu(s), and the coefficient of kinetic (sliding) friction, mu(k) , were determined while varying the normal forces from 0.2 to 1kg. The kinetic coefficients of the arch wires against the control S.S. models measured 0.163, 0.143, 0.240, and 0.312, respectively (P < or = 0.01). Results reveal that, with few exceptions, the S.S. control cylinders yielded lower mu(k)'s than the implanted cylinders. Any improvement seen with the implantations were marginal at best. Theses.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA218135

Entities

People

  • Stephen W. Andrews

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Auger Electron Spectroscopy
  • Auger Electrons
  • Chromium
  • Electron Spectroscopy
  • Friction
  • Ion Implantation
  • Materials
  • Materials Laboratories
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanics
  • North Carolina
  • Research Facilities
  • Stainless Steel
  • Surface Chemistry
  • Surface Properties

Readers

  • Battery Technology and Engineering
  • Materials Science and Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).