Auxiliary springs in continuous arch treatment: Part 2. Appliance use and case reports.
In the second part of this series, three clinical examples are presented to illustrate the use of auxiliary space-closure springs with clinically manageable moment-to-force ratios and new canine brackets to accommodate these springs within the framework of conventional and straight-wire 0.018-inch appliance systems. Eligiloy retraction spring models (0.1650 inch x 0.02150 inch) in the edgewise mode were developed for translational movements along a main archwire. The effects of different preactivation bends for influencing intraarch anchorage are shown for the conditions of reciprocal closure, posterior protraction, and anterior retraction.
Haskell
B S
BS
Department of Orthodontics, School of Dentistry, University of Louisville, Ky.
Spencer
W A
WA
Day
M
M
D000293:Adolescent; D000328:Adult; D003799:Dental Stress Analysis; D003970:Diastema / Q000628:therapy*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D009967:Orthodontic Appliances; D009969:Orthodontic Wires; D012399:Rotation; D014087:Tooth Movement Techniques