Good subject Vash,
My wife and I had the same dentist for about thirty five years. He retired. I went to the same building with a new dentist and they updated the equipment. Amazing.
I had a root canal done in April. The previous one was done ten years ago. He had three assistants working with him on my tooth. The net result was that he said I had an internal crack in the tooth after he had done the root canal. Come back in three months. He cancelled that appointment. Meanwhile I have not heard from their office and has not billed me yet.
Perhaps their bookkeeping is not up to snuff or else he is not charging me coz the tooth is cracked.....