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Early functional treatment in Class II division 1 subjects with mandibular retrognathia using Fränkel II appliance. A prospective controlled study
Pubblication date: 20/2012
Authors: A. Silvestrini-Biavati*, G. Alberti**, F. Silvestrini-Biavati**, A. Signori***, A. Castaldo****, M. Migliorati*
Institution: *Department of Orthodontics, DISC, University of Genoa, Italy
**Department of Paedodontics, DISC, University of Genoa, Italy
***Department of Health Sciences, Section of Biostatistics, University of Genoa, Italy
****Department of Orthodontics, University of Trieste, Italy
Publication: European Journal of Paediatic Dentistry
Publisher: Ariesdue Srl
Keywords: Class II malocclusion; CVM method; Fränkel II device; Functional orthodontic early treatment.
Title: Early functional treatment in Class II division 1 subjects with mandibular retrognathia using Fränkel II appliance. A prospective controlled study
Abstract: Aim This was to clarify dentoalveolar, skeletal and facial profile modifications induced by Fränkel II functional treatment in Class II division 1 subjects in prepubertal stages CS1-2.
Materials and methods Evaluation of 25 caucasian subjects (15 males, 10 females), mean age 8y 11m, in vertebral stages CS1-2. The mean duration of functional treatment was 1y 11m. Study Design: Prospective controlled study. The sample was evaluated at T0, start of treatment, and T1, end of Fränkel II therapy. Untreated subjects in Class II division 1 were the control group. Statistics: T-test for paired data was calculated before and after treatment (P< 0.05).
Results A statistically significant increase between T0 and T1 was obtained for SNB (p = 0.022), ANB (p <0.001), Mx/Mn differential (p = 0.001), Co-Go-Me (p = 0.014), OJ (p < 0.001), OB (p = 0.042), IMPA (p = 0.021) . OJ (p < 0.001) and OB (p = 0.003) showed a higher significant change in the Fränkel group compared to control group.
Conclusion The Fränkel II appliance produced, in CS1-2 subiects, significant effects in teeth position, skeletal modifications and soft tissue changes, although the pubertal growth spurt would occur at least two years later.