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Role of Friction in Orthodontics

  • What is FRICTION ?
  • A force resisting the relative displacement of two contacting bodies in a direction tangent to the plane of contact .
  • Because of friction ,part of the mechanical energy intended for movement of the  two bodies relative to each other is dissipated as thermal energy
  • Static friction is the component of frictional force that has to be overcome to initiate motion
  • Dynamic (kinetic) friction is the component of frictional force that has to be overcome to maintain motion .
  • static frictional force is usually higher than dynamic frictional force

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