The term "root canal" is used to identify the natural cavity in the teeth where the soft area called porridge or pup chamber is found. The dental nerve whose sensory functions can also be found in the root canal.
If the porridge is injured (repetitive dental procedures, patches, teeth are cracked or broken) or infected (due to tooth decay), pulp tissue and dead nerves that can cause severe infections when bacteria begin to multiply and must be removed. You can check out the more about root canal dentist at https://cedarcreekdentistry.com/root-canal/
If gone untreated, the surrounding tissues might also get infected which will result in the following: tooth abscess, bone loss around the tip of the root, swelling might spread to the face, neck, or head, and occurrence of hole at the side of the teeth which might cause drainage problem into the gums, cheek, or skin.
However, it is not as in the past when teeth must be removed when infected, there are special procedures now called root canals or endodontic treatments where teeth can be saved from extraction. Root canal therapy involves repairing and saving teeth that are infected badly by removing pulp and nerves and then protect it by cleaning and sealing the inside of the teeth. The crown is then placed on the teeth treated to make it stronger.