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Bite force and its association with stability following Class II/1 functional appliance treatment.

Abstract
The aims of this study were to investigate the value of pre-treatment maximal molar bite force as a predictive variable in determining post-treatment changes and stability following functional appliance treatment in Class II malocclusion children. Twenty-eight Class II malocclusion children having undergone functional appliance treatment were followed for at least 1 year post-treatment. Maximal molar bite force measurements, lateral cephalograms, and study casts were taken before treatment, after treatment, and after post-treatment follow-up. Relationships between pre-treatment maximal molar bite force and dental or cephalometric changes post-treatment were examined. Patients were divided into stable and unstable groups, based on dental sagittal changes (overjet and molar relationship), and differences between the two groups of patients determined. Post-treatment changes varied widely. Thirteen children showed dentoalveolar sagittal relapse, namely a shift in molars towards a Class II relationship and an increase in overjet, while 15 did not. The unstable group demonstrated a lower pre-treatment maximal molar bite force, as well as a more obtuse gonial angle, than the stable group. The gonial angle was found to be negatively correlated to maximal molar bite force and may thus be a cephalometric indicator partly reflecting the functional condition of the masticatory muscles. Children with a lower pre-treatment maximal molar bite force were more prone to dentoalveolar sagittal relapse following functional appliance treatment.
AuthorsGregory S Antonarakis, Heidrun Kjellberg, Stavros Kiliaridis
JournalEuropean journal of orthodontics (Eur J Orthod) Vol. 35 Issue 4 Pg. 434-41 (Aug 2013) ISSN: 1460-2210 [Electronic] England
PMID22828079 (Publication Type: Journal Article)
Topics
  • Adolescent
  • Bite Force
  • Cephalometry
  • Child
  • Dentition, Mixed
  • Female
  • Humans
  • Male
  • Malocclusion, Angle Class I (physiopathology, therapy)
  • Malocclusion, Angle Class II (physiopathology, therapy)
  • Mandible (physiopathology)
  • Molar (physiopathology)
  • Orthodontic Appliances, Functional
  • Overbite (physiopathology, therapy)

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