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A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
FR972502D1947-09-271948-09-27
Elastic bands for orthodontics and gingivitis treatment
ExpiredFR972502A
(en)