The interchangeable plastic bracket.
D000293:Adolescent; D002648:Child; D004955:Esthetics, Dental; D006801:Humans; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective; D011108:Polymers; D013193:Stainless Steel
D011108:Polymers; D013193:Stainless Steel