(49 days)
Orthodontic brackets are usually cemented to the front surface of the tooth where they direct the mechanical forces that urge teeth into correct alignment. A curved arch wire that is bent or twisted to a particular prescription before installation is forced into a slot in each bracket. The resulting torque or restoring force causes the teeth to shift into the desired alignment. Depending on the shape and twist of the arch wire and the orientation of the bracket slot, it is possible to apply forces, which can shift, rotate, or tip the teeth in any desired direction.
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§ 872.5470 Orthodontic plastic bracket.
(a)
Identification. An orthodontic plastic bracket is a plastic device intended to be bonded to a tooth to apply pressure to a tooth from a flexible orthodontic wire to alter its position.(b)
Classification. Class II.