English: I took this picture of an "Essix-type" retainer. The text in the background is from a work with an expired copyright: C.A. Hawley, "The Removable Retainer (Exhibit)," in The First International Orthodontic Congress.
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2006-08-16 04:49 Hanina 1280×755× (360368 bytes) I took this picture. The text in the background from a work with an expired copyright: C.A. Hawley, "The Removable Retainer (Exhibit)," in The First International Orthodontic Congress.
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