You need to visit a dental clinic whenever a tooth is damaged or needs repair, including a crown or filling. It is likely that the pulp of the tooth has been injured and may eventually die, necessitating a root canal to preserve the tooth.
If the pulp is damaged or when germs enter the pulp chamber, these germs cause disease, and the pulp dies. At the end, the pus from the infection expands and creates a hole in the bone. Therefore, to avoid infection getting deeper into your immune system, you need to get root canal treatment.