microfine composite resin

mi·cro·fine com·pos·ite res·in

(mīkrō-fīn kŏm-pozit rezin)
Restorative compound that contains high surface area silicate particles (0.04-0.2 mcm) at about 25% volume; may be prepared in polymerized oligopolymers and ground into small particles so that inorganic content may be increased.
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