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A fixed anchorage, usually metal, embedded in the acrylic resin base of an orthodontic retainer or soldered to an arch wire. An elastic device is attached during tooth movement.

cleat (klēt),

n a fixed point of anchorage, usually in the form of a metal spur or loop embedded in the acrylic resin base of a Hawley retainer or soldered onto an arch wire, to which a rubber dam elastic or other device is attached during orthodontic tooth movement.

cleat, cleave

claw of any cloven-footed animal.