A local anesthetic will be given to numb the area. A sheet of latex called the "rubber dam" (we've got nonlatex ones too) will be placed around the tooth to isolate it, hence keeping it clean and dry during treatment. The treatment consists of three or four basic steps, but the number of visits will depend on your particular case. Some treatments take 2 visits but many are just a single visit. Occasionally 3 appointments are needed.
In any case, it depends on the degree of infection/inflammation and degree of treatment difficulty. To me, it's more important to do it right then to meet a specific time criteria. Let's look at the basic steps for nonsurgical endodontic therapy.
Using a microscope, a small hole is made in the crown of the tooth to access the pulp chamber. From this space the canals are located and measured. Diseased pulp tissue is removed, and the canal system is cleaned all the way to the very end of the root. Once cleaned and dried, the canal space is sealed and filled. The small hole in the crown of the tooth is then restored with a filling. Most patients are then referred back to their general dentist for a permanent filling, crown, or other restorative work.
Many teeth receiving root canal treatment have symptoms beforehand. Many patients experience significant if not complete pain relief after treatment. Depending on the extent of the infection beforehand, some teeth require several days for pain to resolve. We will discuss your specific expected healing response at the time of treatment.