Uprighting springs used for anchorage.
Sperling
Thomas
T
IAO.
D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008313:Malocclusion, Angle Class III / Q000628:therapy; D016382:Orthodontic Appliance Design; D019516:Orthodontic Space Closure / Q000295:instrumentation; D009969:Orthodontic Wires; D013193:Stainless Steel; D013314:Stress, Mechanical; D014087:Tooth Movement Techniques / Q000295:instrumentation*
D013193:Stainless Steel