Can you please give me a technical description of root canal therapy?

Root canals: It's simply removing the nerve and blood supply from inside the tooth because it has been contaminated with bacteria. Then you must fill the inside of the tooth so it doesn't get recontaminated.

Removing the nerve: In root canal therapy the tooth is saved and the decayed, infected or necrotic nerve tissue in the roots is cleaned out and replaced with a cement filling material.

Internal treatment : Rct involves removing all tissues from the canal(s) in the root(s) of the tooth, then drying and filling those canal(s).

Root canal therapy: is a endodontic treatment to repair and save a damaged or infected tooth instead of extraction. The procedure to replace infected root canal (nerve) with an artificial material. Good luck!