The new 4 D Arch Developer System.
Hedrick
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PP
D006801:Humans; D008310:Malocclusion / Q000628:therapy; D016382:Orthodontic Appliance Design; D017289:Orthodontic Appliances, Functional; D009969:Orthodontic Wires; D010155:Palatal Expansion Technique / Q000295:instrumentation