Thank you for the quick reply.
The lesson: A patient should question everything and do his or her own research.
This is about a top rear molar (second from the rear of the mouth). The Dentist who performed the initial root canal told me the cause of my post procedural headaches and pain was my grinding my teeth when I slept. After more than three years, I went to an Endodontist. He x-rayed the tooth. He didn't say anything about a little glob of filling material protruding from the tip of one of the roots, but he did recommend doing another root canal. He put me on Amoxicillin 500 mg three times a day for 7 days prior to the second operation and then added another seven days of the same dosage of Amoxicillin after. After the second procedure, he did another x-ray, and I noticed that there was a larger glob of filling material protruding from the tip of the root. The Endodontist didn't make any comment about it. He said the Dentist had missed a hairline root during the first procedure, and if the infection didn't clear up, dental surgery would be necessary. I am 62 years old and can handle the complete truth. I was so trusting, I didn't even question either one about the excess filling material at the tip of the root. A friend who had been a dental assistant ,when hearing my story of pain after both procedures, made the comment that it sounded like the first Dentist had perforated the root tip, and she gave the same prognosis as you did. It was then, that I remembered the globs of filling material in both the before and after x-rays. It has been three days since the second procedure. Last night, I still had sensitivity to pressure in the tooth and a headache.
Doctors and Dentists may want to be aware that full disclosure should be considered, especially now that patients can do a Google search.
As stated elsewhere: It would be a good idea for a patient to question everything and do his or her own research.
there is a good chance the tooth will end up needing to be pulled due to pain or infection. sometimes removing the root tip surgically helps.