Even Force™ Springs
Our unique NiTi extension springs exhibit near-constant force through their return and maintain that force to 3X extension of their active coil length without deformation! Available in 9 and 12mm lengths and five force levels.
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Nickel Titanium (NiTi) Ultra Therm® Plus

Ultra Therm Plus is our specially developed heat-activated Nickel Titanium wire with consistent Af performance and moderate forces. The ligating and tooth moving forces of Ultra Therm Plus fall between our moderate force Superelastic 1 and light force Ultra Therm wires. This is an easy wire to work with plus the optimal forces deliver great results!
- Forces fall directly between Superelastic 1 and Ultra Therm wires, providing optimal midrange load characteristics.
- Very consistent Af of 65-75°F (18.3-23.9°C). Every production lot of Ultra Therm Plus is water bath tested to verify the Af.
- Ultra Therm Plus wire is slightly thermal at room temperature for easy ligation.
- Responsive to chilling.
- Excellent resiliency.
Arch Forms | NAT2, GLOBL, INT, and OPTMA™. | |
Forces | Ultra Therm Plus. | |
Wire Sizes | Round: | .012 .014 .016 .018 .020 (.012 and .020 OPTMA not available) |
Square: | .016 x .016 .018 x .018 .020 x .020 | |
Rectangle: | .014 x .025 .016 x .022 .016 x .025 .017 x .025 .018 x .025 .019 x .025 .021 x .025 | |
Pre-Stopped | Available with crimpable tube stops. ![]() |
Centermark | The Dimple® or Etch Centermark.![]() |
Custom Packaging | See Custom Packaging section.![]() |
Force graphs of Ultra Therm Plus wires may be found in the Our Support section.