Missing teeth should always be replaced to prevent loss of the supporting bone. In the absence of a tooth, the bone usually supporting the root during chewing fails to be stimulated. Without this necessary stimulation, the remaining bone after the extraction atrophies as the body redistributes the minerals from that site to other areas of the body. This remodeling of the bone and the soft tissues after extractions is responsible for the sunken-faced look commonly associated with missing teeth.
In the past, dentures and bridges were the only ways to replace missing teeth, but today implants are the state-of-the-art solution. Bridges require the filing down of at least two adjacent teeth to replace the missing teeth between them. Dentures and partial dentures are removable appliances and should be the last option for replacing missing teeth, because although they look like teeth, they do not work like teeth. Instead of connecting to the underlying bone as implants do, they are supported completely by the gums. Resting on the gums and not the bone results in a significant loss of chewing ability and bite force. Implants are the most conservative and best option for replacing missing teeth today.