A denture is a prosthetic device constructed to replace missing teeth. They are supported by the surrounding hard and soft tissues of the oral cavity. There are many different denture designs, some which rely on bonding or clasping onto teeth or suction onto the soft tissues.
It is a protective device for the mouth that covers the teeth and gums to prevent and reduce injury to the teeth arches, lips and gums. A mouth guard is most often used to prevent injury in contact sports. Gum Shields are now compulsory at all football, rugby and boxing matches and training.