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Published on: February 23, 2024
Treatment begin and treatment effect in functional orthodontics with jumping-the-bite appliances
Jörg A Lisson1, Joachim Tränkmann
1Department of Orthodontics, University of Saarland. zkojlis@uniklinik-saarland.de
Aim:
The aim of the present study was to investigate the effects of treatment begin in the early and in the late mixed dentition on treatment with jumping-the-bite appliances.
Patients And Methods:
Casts and lateral cephalograms of 69 patients with Angle Class II, Division 1 malocclusions treated with jumping-the-bite appliances were evaluated.
Results:
A treatment begin in the early or late mixed dentition resulted in a highly significant reduction in overjet and overbite (p < 0.001), in [symbol: see text] SNA and in [symbol: see text] ANB (p < 0.001). An increase of [symbol: see text] SNB depended upon early (p < 0.001) and late (p < 0.01) treatment begin. In the vertical dimension, an early treatment start induced a slightly significant increase in [symbol: see text] NL/NSL and highly significant changes in the upper and lower incisors. With a late treatment start, these changes applied only to the lower incisors. The changes differed significantly only with respect to incisor inclination (upper arch p < 0.01, lower arch p < 0.05). The later the treatment start, the less significant were the dentoalveolar effects.
Conclusion:
At the end of the study period, a slightly significant intergroup difference was recorded for lower incisor inclination only.
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