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MATERIALS AND METHODS
Diagram of teardrop closing loop
14 other sections not shown
360 degree loops 90 degree bend amount of deflection amount of stored archwire bending yield strength bracket engagement change in deflection clinical CM CM CM data are listed degree bend test degrees Fig degrees of torsion deviation in parentheses diameter elastic limit elastic modulus energy of Nitinol energy of stainless force level given amount graphs indicated that Nitinol indicated that stainless invariable physical magnitude maximum elastic deflection modulus of elasticity Nitinol wires orthodontic wires permanent deformation proportional limit rate of stainless recoverable stored energy rectangular wires Results from Table shown in Table stainless steel teardrop stainless steel wires steel and Nitinol steel and TMA steel closing loops steel teardrop closing stress-strain curve teardrop closing loops Test Results three alloy types TMA and four TMA and Nitinol TMA or Nitinol TMA teardrop closing TMA wires torque angle torsional deflection torsional spring rate ultimate tensile strength Yield Strength/Elastic Modulus