Erschienen in:
01.11.2011 | Original article
Neuromuscular adaptations with flexible fixed functional appliance – a 2-year follow-up study
verfasst von:
Dr. S. Sood, MDS, O.P. Kharbanda, R. Duggal, M. Sood, S. Gulati
Erschienen in:
Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
|
Ausgabe 6/2011
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Abstract
Aim
To evaluate long-term neuromuscular adaptation with the flexible fixed functional appliance.
Patients and methods
Electromyography (EMG) was performed on 15 young, growing females with Class II Division 1 malocclusion treated with a flexible fixed functional appliance. Bilateral EMG activity from the anterior temporalis and masseter muscles was monitored longitudinally to determine changes in posture, swallowing, and maximum voluntary clenching during a 24-month observation period.
Results
There was a significant decrease in EMG activity during saliva swallowing (p < 0.05) and maximum clenching (p < 0.05 at 3 months and p < 0.01 at 1 month after treatment); this persisted for up to 1 month but gradually returned to pre-appliance levels near the end of 6 months. It remained stable from then on until the end of the observation period (24 months).
Conclusion
The anterior temporalis and masseter muscles clearly responded to appliance therapy. The neuromuscular adaptation documented after 6 months of treatment remained stable over a 24-month observation period.