Effect of different lengths of post-curing UV light exposure on the mechanical properties of 3D-printed aligners: An in vitro study

Aligners subjected to 60 min of post-print UV light exposure were the most rigid and had highest compressive strength. Increasing the duration of post-UV light curing reduced the amount of water absorbed by the aligners. Since the '60-min cure' group was excessively rigid, a post-curing duration of 40 min is recommended to provide sufficient flexibility for comfortable daily use and wear.