Patent ID: 7284983
Filing Date: 2007-10-23
Classification: A61C

Abstract:
1. A matrix band retainer for dental restoration comprising: a unitary member of a stiff planar spring material formed to have an open ring substantially in a first plane, with the plane of said material of said ring perpendicular to said first plane, a tine at each end of said open ring, each tine extending substantially normal to said plane of said ring, with at least one said tine having a first portion of said planar material extending from the respective end of said ring and a second portion of said planar material extending from said first portion, at an angle to said first portion and adjoining said first portion, to define on one side a ridge, facing the other said tine, and on the other side a valley facing away from the other said tine; the ring, the first portion of said planar material, the second portion of said planar material and the ridge being arranged so that, in use, the first and second portions of said planar material can press against respective first and second adjacent teeth, with said ridge pressing into the interproximal zone between said first and second teeth, and with the other said tine pressing against the opposite side of the same pair of adjacent teeth.