quadhelix appliance

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A fixed slow-expansion orthodontic appliance. It is attached to the teeth by bands cemented to a molar tooth (usually the first molar) on each side of the arch. The spring between the molars is W-shaped and fabricated in 1mm stainless steel wire. In addition to expansion, the appliance can be used to de-rotate rotated molar teeth.

Subjects: Dentistry.

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