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The European Journal of Orthodontics Advance Access published online on October 13, 2006
The European Journal of Orthodontics, doi:10.1093/ejo/cjl030
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© The Author 2006. Published by Oxford University Press on behalf of the European Orthodontic Society. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Article

Which orthodontic archwire sequence? A randomized clinical trial

N. A. Mandall 1 *, C. Lowe 2, H. V. Worthington 1, J. Sandler 3, S. Derwent 1, M. Abdi-Oskouei 1, and S. Ward 1

1 School of Dentistry, University of Manchester, UK
2 Hightown Orthodontic Practice, Crewe, UK
3 Chesterfield Hospital, Sheffield, UK

* To whom correspondence should be addressed.
N. A. Mandall, E-mail: nicola.a.mandall{at}manchester.ac.uk


  Abstract

The aim of this study was to compare three orthodontic archwire sequences. One hundred and fifty-four 10- to 17-year-old patients were treated in three centres and randomly allocated to one of three groups: A = 0.016-inch nickel titanium (NiTi), 0.018 x 0.025-inch NiTi, and 0.019 x 0.025-inch stainless steel (SS); B = 0.016-inch NiTi, 0.016-inch SS, 0.020-inch SS, and 0.019 x 0.025-inch SS; and C = 0.016 x 0.022-inch copper (Cu) NiTi, 0.019 x 0.025-inch CuNiTi, and 0.019 x 0.025-inch SS. At each archwire change and for each arch, the patients completed discomfort scores on a seven-point Likert scale at 4 hours, 24 hours, 3 days, and 1 week. Time in days and the number of visits taken to reach a 0.019 x 0.025-inch SS working archwires were calculated. A periapical radiograph of the upper left central incisor was taken at the start of the treatment and after placement of the 0.019 x 0.025-inch SS wire so root resorption could be assessed.

There were no statistically significant differences between archwire sequences A, B, or C for patient discomfort (P > 0.05) or root resorption (P = 0.58). The number of visits required to reach the working archwire was greater for sequence B than for A (P = 0.012) but this could not be explained by the increased number of archwires used in sequence B.


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[Abstract] [Full Text] [PDF]


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