| Origins: Dentofacial Traction | ||
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| Origins: Dentofacial Traction | ||
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In addition to palatal expansion, two other orthodontic techniques utilized traction for the correction of craniofacial skeletal deformities. In 1866, Kingsley first applied extraoral traction to correct the protrusion of the maxilla (Weinberger, 1918a). His appliance consisted of a gold frame that covered the incisors and a head cap, which was connected to the frame by elastic ligatures.
Nine years later, Potpeschnigg described a "Tooth Regulating Machine" (Weinberger, 1918b) that consisted of a head cap connected to a steel rod, which was secured to the tooth by means of an elastic ring. Traction was applied to the tooth by tightening the elastic band between the head cap and metal rod.
FIG. 2.1.4, 2.1.5. Kingsley's extraoral traction appliance (left) and Potpeschnigg's "Tooth Regulating Machine" (right). Reproduced with permission from Weinberger BW. The history of orthodontia. Part 17. Int J Orthod 1918;4:92-116 and Part 20. Int J Orthod 1918;4:359-387.
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