Mandibular (lower jaw) and Maxillary (upper jaw) tori are anatomic variations of normal. They consist of normal dense bone and project from the jaw bone in a lumpy or bumpy fashion. Up to 30 percent of the population have these and they pose no risk to health. In some instances they may need to be removed. Very rarely they are so large that they interfere with chewing and tongue movement and are painful. Occasionally they become sharp and are painful necessitating removal. Most commonly, when people are planning to have dentures or partial dentures made these large boney projections interfere with the fabrication and fit of the denture. If not removed they can make denture fabrication difficult at best and wearing a prosthesis over them will be quite painful. In this case they are removed.