Hello, I have a patient - an old lady, who wants a set of removable prosthesis. I will attach the OPG and a segment X-ray of the upper right molars. So, on OPG I can see a periapical shadow in right molar area, but it is not present on segment X-ray - I assume it is an artefact. The teeth 17 (using FDI numbering) has been extracted. The problem is what to do with 18 - it is not mobile, not painful. I could fill the caries and save the tooth but It will interfere with the upper removable prosthetic. Or should I extract it? From the lower arch, only the canine is saved because it is stable. Oh and the bridge has been removed (and the 17 was extracted as mentioned earlier because it was perforated on the pulp floor). So I need some opinions about the treatment plan. Thanks in advance