Thank you for giving some more detail about how a single xray can't prove there's no infection.

It was definitely a root tip. I saw it after it was removed. It had a curved shaft that came to a smooth, rounded point, just like the root appeared in the xray before the tooth was pulled. No one familiar with my case has suggested that it wasn't a root tip.

The reason I think my periodontal disease is not that advanced is that none of the doctors have made it sound very dire. What is "oil pulling with coconut oil"?