Abstract: An apparatus is described for placement of light curable dental fillings. The apparatus includes a matrix formed of light transparent material and shaped to conform to the natural contour of a tooth in the interproximal zone. The matrix is thinned in its central regions to permit a filling to be made which has close contact with an adjacent tooth. A light transparent wedge has also been invented which selectively conducts light to the base of the tooth preparation and which can be used to conduct light interproximally which light has been applied at either end of the wedge. A clamp has been invented for use with the wedge and/or matrix or for use independently of these devices. The clamp is formed to fit over the top portion of the wedge to enhance engagement against the tooth over previous clamps which are prevented from extending over the tooth by engagement against the top of the wedge.