When the dental pulp is necrotic, the tooth will have no nutrition, so it will turn black, lose its luster and become brittle. Light-curing is a resin-based material that will age over time. Moreover, if the damage is large, light-curing will not be able to repair it and it will be easily damaged. A full crown restoration is recommended. There are metal porcelain and all-ceramic. If you have high requirements for the appearance of your front teeth, you can choose all-ceramic. Light curing is cheap, but porcelain is expensive.