J. Orthod.
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British Journal of Orthodontics, Vol 21, 349-357, Copyright © 1994 by British Orthodontic Society

ARTICLES

A study of frictional forces between orthodontic brackets and archwires

A Downing, J McCabe and P Gordon
Department of Orthodontics, Glasgow Dental Hospital and School, U.K.

The differences in magnitude of static and kinetic frictional forces generated by 0.022 x 0.030-inch stainless steel (Dentaurum) and polycrystalline ceramic (Transcend) brackets in combination with archwires of different sizes (0.018 inch and 0.019 x 0.025 inch) and materials (stainless steel, nickel-titanium, and beta-titanium) at a constant ligature force were investigated. A friction-testing assembly using the Instron machine was used. In all cases, the static frictional force was greater than the kinetic frictional force. There were no significant differences in the frictional forces generated by stainless steel and polycrystalline ceramic brackets. Beta-titanium archwires produced greater frictional forces than the other two materials. Increasing the archwire diameter increased the frictional force.


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S. Tecco, D. Di Iorio, G. Cordasco, I. Verrocchi, and F. Festa
An in vitro investigation of the influence of self-ligating brackets, low friction ligatures, and archwire on frictional resistance
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D. O'Reilly, P. A. Dowling, L. Lagerstrom, and M. L. Swartz
An Ex Vivo Investigation into the Effect of Bracket Displacement on the Resistance to Sliding
J. Orthod., September 1, 1999; 26(3): 219 - 227.
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Copyright © 1994 British Orthodontic Society.