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Related Experiment Videos

A new concept: impulse in orthodontics

S Braun1, M Bluestein

  • 1Vanderbilt University Medical Center and University of Illinois at Chicago, USA.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|April 1, 1997
PubMed
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Extraoral appliances can effectively balance forces from intraoral appliances like space closure springs. Proper force and timing ensure anchorage preservation, even with part-time wear.

Area of Science:

  • Orthodontics
  • Biomechanical Engineering

Background:

  • Intraoral appliances, such as space closure springs, exert continuous forces on teeth.
  • Extraoral appliances are often used intermittently to counteract these forces and preserve anchorage.

Purpose of the Study:

  • To provide a rational explanation for the effectiveness of part-time extraoral appliance wear in balancing intraoral forces.
  • To establish a theoretical basis for achieving anchorage control in three dimensions.

Main Methods:

  • Equating the impulse (force x time or moment x time) of extraoral appliances to that of intraoral appliances.
  • Analyzing the role of force magnitude and application timing in energy transfer to anchorage teeth.

Main Results:

  • Clinical evidence suggests part-time extraoral appliance wear can suffice for anchorage control.

Related Experiment Videos

  • The impulse-based approach provides a framework for understanding and achieving desired anchorage outcomes.

    • Conclusions:

    • Clinicians can achieve adequate anchorage by carefully adjusting the force/moment magnitude and application time of extraoral appliances.
    • This approach allows for precise control of energy levels for three-dimensional anchorage.