Reverse-sequencing chewing patterns before and after treatment of children with a unilateral posterior crossbite.
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.
Piancino
Maria Grazia
MG
Department of Orthodontics, Turin University, Italy.
Talpone
Francesca
F
Dalmasso
Paola
P
Debernardi
Cesare
C
Lewin
Arthur
A
Bracco
Pietro
P
D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000503:physiopathology* / Q000628:therapy; D008409:Mastication / Q000502:physiology*; D009971:Orthodontics, Corrective; D018709:Statistics, Nonparametric