As well as having an attractive appearance, teeth play two very important roles. They help us speak, and help us eat. In order to speak clearly and concisely, people need teeth, particularly the front ones. Without teeth, lisping, mumbling and whistling are common.
Of more importance is eating. Not being able to eat a full range of food limits the diet. Many adults with edentulism have problems chewing and as a result, avoided eating some foods. This can have nutritional and social consequences.