I never heard of the term until a dentist mentioned it. There is an area medical center that offers dental one day a week. We just went for a checkup and cleaning. The wait times on appointments can be months so the dentist said if ever had an emergency (pain) to just show up and they would work you in and remove the root. I asked if that was a root canal and she said no it was half a root canal.
This sounds like they remove the infected pulp, clean, disinfect, and do not fill or seal. (?)
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During root canal the
infected pulp is removed and the inside is carefully
cleaned and disinfected, then filled and sealed with a rubber-like material called gutta-percha. Afterwards, the tooth is restored with a crown or filling for protection.
Root Canal Treatment - Get the fact about root canals | AAEorg