Continuous force- active force that decreases little in magnitude betwwen appointments.

  • Light weight appliances
  • Highly flexible appliance components used which are activated at low force level.
  • No interference with biological function and no harm to soft tissues.
  • Direct resorption of bone

Intermittent force- active force that decays to zero before next appointment.

  • High stiffness appliances
  • Twice the force activation for corresponding soft tissue deformation
  • Undermining resorption and corresponding tooth movement.

Interrupted force- inactive for intervals of time between appointments

  • Cyclic, long term magnitude time pattern
  • Heavy forces delivered
  • No force decay

Reference- orthodontics bhalajhi


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