Your gums are constantly changing. When the remaining gum or residual ridge atrophies or “shrinks”, it changes the shape of the face and mouth. These changes happen gradually and then your denture no longer fits properly. Your denturist is the most qualified person to tell you if refitting or “relining” the denture base to compensate for these changes can be made or if your dentures need to be replaced. Here are some signs that your dental prosthesis need to be checked. *Problems chewing certain foods, *Thinning lips, sagging mouth or change in facial features, *Prosthesis loose or falling out when speaking or laughing *Discoloration and odor.