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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.
ma·trix re·tain·er(mātriks rĕ-tānĕr)
Mechanical device designed to hold a matrix around a tooth during restorative procedures.