The crowns are made of non-toxic polycarbonate. This plastic is due to its molecule structure extremely un-susceptible, even to the strain of important temperature changes and other physical or chemical influences. These very flexible and thin crowns can be cut, formed, bent and pressed without breaking or ripping. They form stable compounds with all acrylates and ZnO-tooth cements. Further these polycarbonate crowns are superior because of their good cervical fit, precise anatomy and shade stability. Packing: Anteriors and Premolars ass. box of 180 crowns, with mould guides.
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