Abstract: A dental matrix clamp comprising an elongate body (1), a matrix band (27) mountable relative to the body (1) so as to form a loop projecting at one end of the body (1). The clamp has a tensioning device operable on the band (27) to tighten the N loop, and a deflector member (15) which engages the band (27) to provide an inclined conformation thereto. The deflector member (15) is adjustable transversely across the band (27) between opposite positions at which it bears against opposite peripheral portions of the band (27). The clamp is a hand-held device used in dentistry to clamp a band around a tooth for retention and moulding of filling material.