Dental implants are false teeth anchored to the jaw bone almost completely mimicking real teeth, if you didn't tell someone about the implant they would think it's a real tooth. People of any age are abel to have implants, the only real requirement to become an implant candidate is to have a decent amount of jaw bone and that it is healthy bone. People with weak bone would not be able to have implants.

How do implants work?
There are two common types of implant, Endosteal and Subperiosteal. Endosteal works by implanting screws, cylinders or blades into the bone, by drilling a hole in the bone and inserting them. The insert is left of a period of months to fuse with the bone. During this time a temporary tooth is placed to hide the gap. Once strong enough the tooth is then fixed to the screw. Subperiosteal implants are not implanted into the bone but sit ontop of the jaw. This type of implant is a good option for people who are unable to use normal dentures.

Dental implants can replace one tooth, several teeth or all of your teeth. They don't have the negative effect of causing the gum line to receed like bridgework.