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Muscle function during treatment with the functional regulator.

T D Freeland

    The Angle Orthodontist
    |October 1, 1979
    PubMed
    Summary
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    The Functional Regulator alters orofacial muscle activity and dental/skeletal dimensions. Class II patients showed decreased muscle activity, while Class III patients showed increased activity.

    Area of Science:

    • Orthodontics
    • Biomedical Engineering
    • Physiology

    Background:

    • Understanding the relationship between orofacial muscle activity and dental/skeletal relationships is crucial in orthodontics.
    • Previous research has explored the impact of orthodontic interventions on muscle function, but comprehensive electromyographic analysis over extended periods is less common.

    Purpose of the Study:

    • To investigate the electromyographic (EMG) changes in orofacial muscles during orthodontic treatment with the Functional Regulator.
    • To compare EMG data with dental and skeletal changes in Class I, II, and III subjects.

    Main Methods:

    • Electromyography was used to study muscle activity in 30 subjects over 6 and 12 months.
    • Subjects were divided into a control group and two treatment groups (Class II and Class III).

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  • Dental, skeletal, and EMG data were analyzed and charted.

    • Main Results:

    • Class I subjects differed from Class II and III in muscle behavior.
    • Class II treated subjects showed significant changes in upper lip and suprahyoid muscles, with overall decreased muscle activity.
    • Class III treated subjects exhibited significant changes in lower lip and suprahyoid muscles, with overall increased muscle activity.

    Conclusions:

    • The Functional Regulator significantly alters orofacial muscle activity and dental/skeletal dimensions.
    • Changes in muscle activity patterns correlate with the magnitude of dental and skeletal changes in Class II and III subjects.
    • The study highlights a clear link between Functional Regulator use and alterations in both muscle function and craniofacial structure.