A denture is a removable replacement for missing teeth and surrounding tissues. Complete dentures are used when all the teeth are missing, while partial dentures are used when some natural teeth remain. At first, you might need some time adjusting to wearing dentures as your muscles, nerves and ligaments adjust to this new denture. Overtime, talking and eating functions will occur normally. Dentures can also help support the structures of the lips and face, providing a natural looking facial structure.