Journal Article

Surface roughness of orthodontic wires via atomic force microscope, laser specular reflectance, and profilometry

C Bourauel, T Fries, D Drescher and R Plietsch

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 20, issue 1, pages 79-92
Published in print February 1998 | ISSN: 0141-5387
Published online February 1998 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/20.1.79
Surface roughness of orthodontic wires via atomic force microscope, laser specular reflectance, and profilometry

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The surface roughness of orthodontic archwires is an essential factor that determines the effectiveness of arch-guided tooth movement. Using the non-destructive techniques of atomic force microscopy (AFM) and of laser specular reflectance, the surface roughness of 11 nickel-titanium orthodontic wires, a stainless steel and a β-titanium wire was measured. The results were compared with those obtained using surface profilometry. The smoothest wire, stainless steel, had an optical roughness of 0.10 μm, compared with 0.09 μm from AFM and 0.06 from profilometry. The surface roughness for the β-titanium wire measured by all three methods was approximately 0.21 μm, while that of the NiTi wires ranged from 0.10 to 1.30 μm. As the surface roughness not only affects the effectiveness of sliding mechanics, but also the corrosion behaviour and the aesthetics of orthodontic components, the manufacturers of orthodontic wires should make an effort to improve the surface quality of their products.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

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