The Non-Helix Appliance: An Alternative to the Quad Helix
Indirect Measurement of Archwire Circumference
Dr. Gerald Spencer introduces the non-helix, a versatile, comfortable expander constructed from .036" round beta titanium wire. He shows how the appliance can be adapted to correct mesial first-molar rotations, distalize molars on one or both sides, or open the bite.
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