Restorative Dentistry » Dentures A denture is an appliance which is worn to replace lost or missing teeth to enable you to enjoy a healthy diet and smile with confidence. A complete or full denture is one that replaces all of the natural teeth in either the upper or lower jaws. A partial denture fills in the spaces created by lost or missing teeth and is attached to your natural teeth with metal clasps or devices called precision attachments. The base of a denture is called a plate and can be made of either acrylic (plastic) or metal. The teeth are normally made of acrylic and can be made to match your natural teeth. This is especially important in the case of partial dentures.