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an appliance or device that keeps a tooth or partial denture in proper position.
matrix retainer a mechanical device that clamps the ends of a matrix band and tightens it around a tooth.
Tofflemire retainer a type of matrix retainer.
a mechanical device designed to hold a matrix around a tooth during restorative procedures, usually by engaging the ends of the matrix band and drawing the band tight.
a mechanical device used to secure the ends of a matrix band around a tooth. The band provides a substitute wall where a part of the tooth is missing and helps to compact a restoration into a prepared tooth cavity after the carious lesion has been removed. Also called matrix holder. See also retainer.
ma·trix re·tain·er(mātriks rĕ-tānĕr)
Mechanical device designed to hold a matrix around a tooth during restorative procedures.