#U-61 Upper Left 1st Molar Tin-Silver Alloy Temporary Crowns, Box of 5. Reliable provisional protection. Prefabricated for maximum placement convenience. For maintenance of appropriate teeth spacing. Good build ensures a snug fit. Iso-Form Metal Temporary Crown contains tin-silver alloy for excellent retention of preparation shape and margin adaptation in adult posterior restorations, specifically bicuspids and molars. Iso-Form allows a more rapid, single-unit procedure compared to chemical resin and acrylic.The set contains 64 crowns of various sizes and comes in a special tray that supports stacking for hassle-free storage. Refills sold boxes of five.