Final answer:
A pulpectomy is the procedure where the root and part of the tooth are removed to eliminate infection and pain.
Step-by-step explanation:
The procedure where the root and part of the tooth are removed is called a pulpectomy. In this procedure, the inflamed pulp tissue is completely removed from the tooth, including the root canal, to prevent the spread of infection and alleviate pain. After the pulpectomy, the tooth is typically filled and restored to its normal function.