An essential step in keeping a healthy smile is to replace teeth which are missing. When teeth are missing, the remaining ones can and will change position, drifting into the neighbouring spaces. Teeth which are out of position may actually damage tissues in the mouth. In addition, it may be difficult to clean thoroughly between crooked teeth. Consequently, you may run the risk of tooth decay and gum disease (periodontitis), which could lead to loss of further teeth. A removable partial denture fills in the space where teeth are missing and helps to fill out your smile. A denture helps you to properly chew food, a difficult task when you are missing teeth; a denture may also improve speech and prevent a sagging face by providing support for the lips and cheeks.