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Can you use EXACTA Temp Xtra to reline polycarb crowns?
Last Updated: 08/06/2008
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No. You cannot use EXACTA Temp Xtra to reline polycarbonate or prefabricated crowns.
Bis-Acylics, like EXACTA Temp Xtra, do not set in the presence of oxygen. Therefore there is always a layer of uncured material on a bis-acrylic crown. This is commonly referred to as the oxygen-inhibition layer or smear layer. While it is easily removed with alcohol, the layer will inhibit an interaction with preformed crowns.
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