A photopolymerizable composition for an orthodontic article comprising: (a) 50 to 90 wt.%, inclusive, of at least one urethane component; (b) 5 to 50 wt.%, inclusive, of at least one reactive diluent, wherein the at least one reactive diluent has a molecular weight of 400 grams per mole or less, is free of any urethane functional groups, and comprises a methacrylate; (c) 0.1 to 5 wt.%, inclusive, of a photoinitiator; and (d) an optional inhibitor in an amount of 0.001 to 1 wt.%, inclusive, if present; based on the total weight of the photopolymerizable composition, wherein the photopolymerizable composition has a viscosity at a temperature of 40 degrees Celsius of 10 Pa·s or less, as determined using a magnetic bearing rheometer using a 40 mm cone and plate measuring system at a shear rate of 0.1 1/s, wherein the photopolymerizable composition is free of monofunctional components, and wherein a reaction product of the photopolymerizable composition exhibits an elongation at break of 25% or greater as determined according to ASTM D638-10 using test specimen Type V; and wherein the at least one urethane comprises a high Mn urethane component and a low Mn urethane component, wherein a ratio of the high Mn urethane component to the low Mn urethane component ranges from 95:5 high Mn urethane component to low Mn urethane component to 80:20 high Mn urethane component to low Mn urethane component, wherein the high Mn urethane component has a number average molecular weight of 1,000 grams per mole (g/mol) or greater, with the proviso that all branches off the backbone of the compound, if present, have a Mn of no more than 200 g/mol, and wherein the low Mn urethane component has either 1) a number average molecular weight of 100 g/mol or greater and up to but not including 1,000 g/mol, or 2) a number average molecular weight of 100 g/mol or greater and 2,000 g/mol or less, with the proviso that a number average molecular weight of any one or more linear portions between two reactive groups and/or branches is up to but not including 1,000 g/mol, wherein number average molecular weight is as measured by matrix assisted laser deposition ionization mass spectrometry. (a) 50 to 90 wt.%, inclusive, of at least one urethane component; (b) 5 to 50 wt.%, inclusive, of at least one reactive diluent, wherein the at least one reactive diluent has a molecular weight of 400 grams per mole or less, is free of any urethane functional groups, and comprises a methacrylate; (c) 0.1 to 5 wt.%, inclusive, of a photoinitiator; and (d) an optional inhibitor in an amount of 0.001 to 1 wt.%, inclusive, if present; based on the total weight of the photopolymerizable composition, wherein the photopolymerizable composition has a viscosity at a temperature of 40 degrees Celsius of 10 Pa·s or less, as determined using a magnetic bearing rheometer using a 40 mm cone and plate measuring system at a shear rate of 0.1 1/s, wherein the photopolymerizable composition is free of monofunctional components, and wherein a reaction product of the photopolymerizable composition exhibits an elongation at break of 25% or greater as determined according to ASTM D638-10 using test specimen Type V; and wherein the at least one urethane comprises a high Mn urethane component and a low Mn urethane component, wherein a ratio of the high Mn urethane component to the low Mn urethane component ranges from 95:5 high Mn urethane component to low Mn urethane component to 80:20 high Mn urethane component to low Mn urethane component, wherein the high Mn urethane component has a number average molecular weight of 1,000 grams per mole (g/mol) or greater, with the proviso that all branches off the backbone of the compound, if present, have a Mn of no more than 200 g/mol, and wherein the low Mn urethane component has either 1) a number average molecular weight of 100 g/mol or greater and up to but not including 1,000 g/mol, or 2) a number average molecular weight of 100 g/mol or greater and 2,000 g/mol or less, with the proviso that a number average molecular weight of any one or more linear portions between two reactive groups and/or branches is up to but not including 1,000 g/mol, wherein number average molecular weight is as measured by matrix assisted laser deposition ionization mass spectrometry.