A denture is a removable replacement for missing teeth and the tissues connected to those teeth. It is made of acrylic plastic and sometimes porcelain and metal materials. A denture closely resembles natural gum tissue and teeth. Complete dentures replace all of the teeth, while partial dentures fill in the spaces created by missing teeth and prevent other teeth from shifting position. Dentures are not just for elderly patients. Patients of any age may lose some or all of their teeth and may require a denture of some sort. Because teeth are a permanent part of the body, tooth loss can have an emotional impact on some people.