This patient came with a small swelling in relation to the first molar and carious premolar. The molar was non vital and had furcal bone loss. Most cases like these with furcal bone loss associated with a non-vital tooth usually heal with endo alone. In this particular case, I had noticed that the mandibular second molar had secondary decay under the crown and a large peri-apical lesion. I had advised extraction of the wisdom tooth and the mandibular second molar. To my surprise, the patient came back after a year with pain in relation to the second molar. I saw that the clinician had put a crown on that! I advised extraction of the second molar again. 🙂