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Nickel Titanium Springs Extension

Extension, or Closed Coil, springs are used to maintain or close spaces. Ultimate offers extension springs in popular lengths with pre-attached Key-end^™ eyelets. Our Key-ends are attached firmly to the spring and are manufactured with smooth edges and round hole for easy attachment to TADs (Temporary Anchorage Devices), hooks, or brackets to retract teeth.

Ultimate offers Nickel Titanium Extension Springs in both Variable and Superelastic forces. Variable Extension Springs, our most popular, provide gentle tooth-moving forces that gradually decrease during retraction. Superelastic Extension Springs provide nearconstant tooth-moving forces throughout their activation range. Further explanation may be found in Spring Basics.

• Springs are made of premium Nickel Titanium wire.
• Provide continuous retraction forces throughout activation.
• Securely attached, precision designed Stainless Steel Key-end eyelets for easy attachment.
• Virtually no permanent deformation with proper use.
• Recommended activation length is two times original spring length.

Extension Springs 6mm, 9mm, 12mm, 15mm lengths (all with Key-ends)
Spring Sizes
	With attached Key-end™ Eyelets
		6mm	9mm	12mm	15mm
Variable Force	.010 x .030	X	X	X	X
	.011 x .030	X	X	X	X
	.012 x .030	X	X	X	X
Superelastic Force	Super Light .009 x .030		X	X
	Light .010 x .030	X	X	X
	Medium .011 x .030		X	X
	Heavy .012 x .030		X	X
X Indicates available from stock.

Force graphs of Nickel Titanium Extension Springs may be found in the Our Support section.

Helpful Hint:

• The greater the wire size, the higher the force.
• The smaller the inside diameter (lumen), the higher the force.
• The shorter the length (# of active coils), the higher the force.

How may we serve you?

Phone (860) 582.9111, Toll-Free (800) 999.6484 (USA & Canada)
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