Two months ago, I got a crown on my third molar. All seemed to be fine until last month, my gum became very sore and swollen. I also developed a large lump on the gum near the crowned molar. It was very painful so I went to my dentist to have it checked. He said I have a gum infection and he put me on antibiotics. After five days, I went back to the dentist because the pain did not go away. After looking at the Xray result, he said I need a on the crowned tooth. Is this correct? Based from the tests done by my dentist on the tooth and on the neighboring teeth, they are not sensitive to hot and cold. So I am wondering if a canal is necessary for a gum
infection. Please advice me.