A composition includes a light-curable viscous mixture that includes: 0-50% by weight of a poly(methyl methacrylate)/methyl methacrylate solution； 5-20% by weight of at least one kind of multifunctional aliphatic (meth)acrylate； 5-40% by weight of at least one kind of aliphatic urethane (meth)acrylate oligomer； 25-65% by weight of at least one kind of difunctional bisphenol-A dimethacrylate； 0.1 to 5% by weight of at least one kind of a photoinitiator； 0.05 to 2% by weight of at least one kind of light stabilizer； and 0.1 to 3% by weight of color pigment based on the total weight of the composition.
