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retainer
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1. a device for retaining or keeping something in position. 2. the part of a denture that unites the abutment tooth with the suspended portion of the bridge, such as an inlay, partial crown, or complete crown. 3. an orthodontic device for maintaining in position the teeth and jaws. 4. any form of clasp, attachment, or other device used for the fixation or stabilization of a prosthetic appliance. 5. the portion of a fixed prosthesis attaching a pontic to the abutment teeth.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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