CPC A61K 6/62 (2020.01) [A61C 7/002 (2013.01); A61C 7/08 (2013.01); A61K 6/893 (2020.01); B29C 64/124 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); C08L 75/14 (2013.01)] | 20 Claims |
1. An orthodontic article comprising a cured composition comprising
a free-radically polymerizable resin comprising a urethane (meth)acrylate comprising polymerized units derived from a diol selected from polycarbonate diol or polyester diol;
a first free-radical photoinitiator having sufficient absorbance at a first wavelength range; and
a second free-radical initiator selected from a second photoinitiator having sufficient absorbance at a second wavelength range, wherein the second wavelength range is different than the first wavelength range, or a thermal free-radical initiator.
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