Author(s):
1. Zorana Stamenkovic, Stomatoloski fakultet u Beogradu, Serbia
2. Nenad Nedeljković, Clinic of Orthodontics, School of Dentistry, University of Belgrade, Serbia
3. Vladan Mirjanić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
4. Vanja Stojic, Stomatoloski fakultet u Beogradu, Serbia
5. Nemanja Marinkovic, Stomatoloski fakultet u Beogradu, Serbia
6. Ivan Arsic, Stomatoloski fakultet u Beogradu, Serbia

Abstract:
Abstract:In this case boy in the age of 7 years with severe distal bite caused by mandibular retrognatism was treated by Fränkel functional regulator type Ic. Aim: The aim of this paper was to show main skeletal and dental effects of Fränkel functional regulator type I in early treatment of skeletal distal bite. If we use functional appliance in early mixed dentition we can successfully correct mandibular retrognatism and avoid later long orthodontic treatment. Matherial and method: In this case was treated boy in early mixed dentition with skeletal Class II. Before treatment clinical examinations, study cast analysis, intraoral and extraoral photos, orthopantomogram and lateral cephalogram have been done. Active phase of treatment lasted 18 months. During this period patient wore an appliance continuously for 24 hours except during meals. An appliance was made on the basis of registered construction bite in postion of posterior teeth in Class I. Patient used screws in appliance once in 10 days. Lateral cephalogram, intraoral and extraoral photos have been done on the end of active phase of orthodontic treatment. Results and conclusion: Before treatment patient had severe Class II with deep byte and overjet of 11mm. Parameters on lateral cephalogram were: SNA 83°, SNB 77°, ANB 6°, Wits apprasial 9mm, SpP/MP 27°, FMA 21°, FMIA 59°, IMPA 100°, I/SpP 117°, Bjork 390°, Jarabak ratio 68%. After active phase of treatment patient had stabile occlusion in Class I, reduced overbyte and overjet of 3mm. On lateral cephalogram measured parameters were: SNA 83°, SNB 79°, ANB 4°, Wits apprasial 0mm, SpP/MP 25°, FMA 20°, FMIA 59°, IMPA 101°, I/SpP 115°, Bjork 390°, Jarabak ratio 68%. Fränkel functional regulator was very successfull appliance for early treatment of skeletal distal bite, before pubertal growth spurt. This appliance caused skeletal and dentoalveolar changes and contributed to the correction of swallowing and speech.

Key words:
Key words: Fränkel functional regulator,skeletal distal bite,mandibular retrognatism,functional appliance

Thematic field:
SYMPOSIUM B - Biomaterials and nanomedicine

Date of abstract submission:
31.03.2022.

Conference:
Contemporary Materials 2022 - Savremeni materijali