When a tooth’s nerve or pulp area becomes diseased or injured, a special dental procedure called root canal therapy can help you save that tooth. If the diseased pulp is not removed, your tooth will only get worse, and will need to be removed. During a root canal treatment, Dr. Oh removes the pulp, cleans the root canal and seals the canal to protect it. Once you are healed, Dr. Oh places a crown over the tooth to help make it stronger. Generally, a root canal is a relatively simple procedure with little or no discomfort.