A dental matrix includes a band with an edge for placement toward the gingival margin of a tooth to be restored, and a strip of material such as dental floss, attached to and extending along an edge of the band. In the preferred embodiment, buccal and lingual extensions are located beyond a central portion of the band along the edge. The extensions are folded over the strip of material so as to secure the strip of dental floss to the edge. The strip of material facilitates the insertion of the band in the interproximal space between two teeth.