A small piece of a root canal treated tooth that has been lost can continue to be filled. After a tooth has undergone root canal treatment, the tooth will become weaker due to the loss of nutrient supply, which will also discolor and darken the tooth over time, affecting its aesthetics. Eating too hard food or stress concentration while eating may cause the tooth to splinter. It is best to have a crown restoration done two weeks after the root canal treatment, which will prevent the tooth from splintering and also restore the tooth’s aesthetics. After root canal treatment, you should also do a good job of oral care, try not to use the affected tooth to eat hard food, such as eating nuts, gnawing ribs, etc., in order to prevent the crown from chipping. Whether or not a crown is needed after root canal treatment depends on the extent and location of the tooth defect, and the optimal restoration plan will be selected under the advice of a licensed physician.