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The European Journal of Orthodontics Advance Access published online on June 13, 2006
The European Journal of Orthodontics, doi:10.1093/ejo/cjl014
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© The Author 2006. Published by Oxford University Press on behalf of the European Orthodontics Society. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Article

Reverse-sequencing chewing patterns before and after treatment of children with unilateral posterior crossbite

Maria Grazia Piancino 1, Francesca Talpone 1, Paola Dalmasso 2, Cesare Debernardi 1, Arthur Lewin 3, and Pietro Bracco 1 *

1 Departments of Orthodontics and Gnathology-Masticatory Function, Italy
2 Medical Statistics and Biometry, Turin University, Italy
3 Department of Orthodontics, University of the Witwatersrand, Johannesburg, South Africa

* To whom correspondence should be addressed.
Pietro Bracco, E-mail: pietro.bracco{at}unito.it


  Abstract

The aim of this study was to compare the percentage of reverse-sequencing chewing cycles in 22 children [9 boys and 13 girls; mean age ± SD, 8.6 ± 1.3 and 8.8 ± 1.5 years, respectively), with a unilateral right or left posterior crossbite, before and after therapy.

The chewing cycles were recorded using a kinesiograph while the subjects masticated a soft and a hard bolus on both the crossbite and non-crossbite side. Chewing data were acquired before and 6 months after orthodontic treatment of the crossbite with an orthodontic functional appliance, the ‘Function Generating Bite’.

The results showed that, before therapy, the percentage of reverse-sequencing chewing cycles on the crossbite side was significantly higher than that on the normal side (P < 0.001) with both the soft and hard bolus. In addition, the percentage of reverse-sequencing chewing cycles on the crossbite side before therapy was significantly greater than after therapy with both a soft and hard bolus (P < 0.001). No significant differences were found in the percentage of reverse-sequencing chewing cycles on the non-crossbite side, before or after therapy, either with a soft or hard bolus.


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