Dentures are the least invasive way of replacing missing tooth/teeth. Complete and partial dentures are the two types available. When all the teeth are missing, complete dentures are needed while partial ones are needed when only some teeth remain. Dentures are made to closely resemble your natural teeth so there should be no significant changes in outward appearance. They are very durable appliances that will last many years and can be remade many times, with proper care.
