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Orthodontic appliance system

  • US 4,717,341 A
  • Filed: 01/13/1986
  • Issued: 01/05/1988
  • Est. Priority Date: 01/13/1986
  • Status: Expired due to Term
First Claim
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1. In an orthodontic appliance system for applying corrective forces to the teeth of a patient, the improvement wherein a force delivery component of the system is formed from a fiber reinforced composite material comprising a polymeric matrix and at least 5% by weight of reinforcing fibers embedded in the matrix, said composite material having a modulus of elasticity below 30×

  • 106 psi and a preselected ratio of Yield strength to modulus of elasticity within the range from a level comparable to that of 18-8 stainless steel up to at least 300 percent that of such stainless steel whereby more constant force levels can be applied with time and a continuous range of stiffness is achieved, said composite material having a higher maximum elastic deflection than said stainless steel and an ability to provide complex orthodontic configurations so as to enhance the ease and accuracy of force delivery.

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