Add to Cart Quick view 3M Iso-Form Crown, Lower Bicuspid, Refill L-40 5pk (3M) $19.99 Iso-Form Crown, Lower Bicuspid, Refill L-40 5pk (3M) Product Details Prefabricated crowns made of tin-silver alloy for short-term adult posterior use. Refills of individual permanent crowns are available in boxes of five. Pre-finished,... $19.99 Add to Cart Quick view