I saw this Dentist for tooth pain. He performed a root canal he said. 30 years later. I see a holistic dental practice & the Dentist there says he never completed the root canal by filling it with root sealant Gutta Percha. Ive been ill this whole time with slowly deteriorating dead tooth (removed nerve). I could have gotten a severe infection from this. He stuffed cotton inside the crown. If you see this Doctor run like hell. Grade: F-