Srpski arhiv za celokupno lekarstvo 2018 Volume 146, Issue 3-4, Pages: 149-156
https://doi.org/10.2298/SARH170428146R
Full text ( 271 KB)
Effects of three types of functional appliances in class II malocclusions treatment - sagittal and vertical changes
Ristić Vladimir (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Stefanović Neda Lj. (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Stamenković Zorana (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Živković-Sandić Marija (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Stojić Vanja (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Glišić Branislav (Faculty of Dental Medicine, Department of Orthodontics, Belgrade)
Introduction/Objective. Class II malocclusions are sagittal malocclusions
characterized by a distal relationship of posterior teeth. Depending on the
underlying problem, class II can be skeletal or dentoalveolar. Class II
treatment modality will depend on the cause, severity and age. Growth
modification is the best treatment option in skeletal Class II growing
patients. The aim of this study was to establish and compare sagittal and
vertical skeletal and dental changes in patients treated with the “M block”
appliance, the Fränkel functional regulator and the Balters’ Bionator.
Methods. The sample consisted of 70 patients diagnosed with skeletal class II
(ANB > 4°) and mandibular retrognathism (SNB < 80°). Patients were divided
into 3 groups according to the type of appliance. All patients went through
the standard diagnostic procedure (anamnesis, clinical and functional
analysis, study model, panoramic radiograph and cephalometric analysis) and
dental and skeletal age was determined. Treatment effects were analyzed on
study models and cephalograms at the end of treatment. Results. All
appliances led to significant mandibular anterior movement and sagittal
growth, which reduced ANB values. All three groups of patients presented with
neutral growth pattern, upper incisor retrusion and lower incisor protrusion
at the end of treatment. Conclusion. Results of this study indicate efficacy
of all three appliances in skeletal class II treatment.
Keywords: Class II malocclusion, Functional treatment, “M block” appliance, Fränkel appliance, Bionator