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Friction coefficients and wear rates of different orthodontic archwires in artificial saliva


The aim of this paper is to analyze the influence of the nature of the orthodontic archwires on the friction coefficient and wear rate against materials used commonly as brackets (Ti–6Al–4V and 316L Stainless Steel). The materials selected as orthodontic archwires were ASI304 stainless steel, NiTi, Ti, TiMo and NiTiCu. The array archwire’s materials selected presented very similar roughness but different hardness. Materials were chosen from lower and higher hardness degrees than that of the brackets. Wear tests were carried out at in artificial saliva at 37 °C. Results show a linear relationship between the hardness of the materials and the friction coefficients. The material that showed lower wear rate was the ASI304 stainless steel. To prevent wear, the wire and the brackets have high hardness values and in the same order of magnitude.

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The authors are grateful to the CICYT MAT 13547 and Generalitat de Catalunya and Andorra Government (CTP project) for funding the present study. The authors do not have conflict of interest associated with this study.

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Correspondence to F. J. Gil.

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Alfonso, M.V., Espinar, E., Llamas, J.M. et al. Friction coefficients and wear rates of different orthodontic archwires in artificial saliva. J Mater Sci: Mater Med 24, 1327–1332 (2013).

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  • Friction Coefficient
  • Wear Rate
  • Wear Test
  • Stainless Steel 316L
  • Adhesive Wear