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Arch changes after Class II, Division 1 treatment with jumping-the-bite appliances
Magdalena Stec-Slonicz1, Sabine Weindel, Sandra Paurevic
1University Hospital Saarland, Department of Orthodontics, Homburg/Saar, Germany. magdalena.stec-slonicz@uks.eu
Summary
Orthodontic treatment using jumping-the-bite appliances in patients with Angle Class II, Division 1 malocclusion resulted in increased arch length and width. These appliances also reduced overjet and overbite, indicating significant dentoalveolar changes.
Area of Science:
- Orthodontics
- Dental Arch Analysis
- Malocclusion Treatment
Background:
- Angle Class II, Division 1 malocclusion presents significant challenges in orthodontic treatment.
- Skeletal Class II discrepancies require effective management strategies.
- Jumping-the-bite appliances offer a specific approach to address these issues.
Purpose of the Study:
- To describe dental arch changes in patients with Angle Class II, Division 1 malocclusion and skeletal Class II.
- To evaluate the effects of jumping-the-bite appliances (Hannover design) on dental arches.
- To analyze specific dentoalveolar and occlusal changes during treatment.
Main Methods:
- A cohort of 69 patients (37 female, 32 male) with Angle Class II, Division 1 malocclusion and skeletal Class II were treated with jumping-the-bite appliances.
- Measurements included anterior arch length, E-space, arch width (anterior and posterior), overjet, and overbite.
- Dental casts were analyzed pre-treatment, annually, and post-treatment, with statistical analysis using mean, standard deviation, and t-tests.
Main Results:
- Anterior arch length increased, primarily due to incisor protrusion, especially in the lower arch.
- Both anterior and posterior arch widths increased in the upper and lower jaws.
- E-space decreased, while overjet and overbite were reduced to physiological levels.
Conclusions:
- Treatment with jumping-the-bite appliances induces notable dentoalveolar changes alongside skeletal modifications.
- These characteristic changes, including arch dimension alterations and overjet/overbite reduction, are crucial considerations.
- Therapeutic planning for Angle Class II, Division 1 malocclusion must account for these appliance-induced dentoalveolar effects.
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