Impact of monomer contamination of isopropanol during post-rinsing on the accuracy of dental models fabricated by vat photopolymerization.

This study showed that, contrary to the manufacturer's specifications, the IPA should only be replaced during post-rinsing if the monomer contamination of the rinsing solution is >20%. At contamination levels of 10%-20%, post-rinsing of components with large smooth surfaces without sharp edges (e.g., custom trays) is possible without significant deformation. Only for components with very small, sharp-edged, or inverted structures is it advisable to replace the IPA from a contamination level of 10%.