Why should I have my cavity fixed if it doesn’t hurt?
A cavity that is left untreated will continue to grow. When a cavity is small, it can easily be treated with a tooth-colored filling. If the decay spreads, it will mean that more of the tooth structure has to be removed and treatment options may become more complex. You may require a crown or a root canal. Extraction is even a possibility if the tooth has so much decay it cannot be restored.