A dental implant is used to support one or more false teeth. It is a titanium screw that can replace the root of a tooth when it fails. Just like a tooth root, it is placed into the jawbone.Implants provide a strong foundation for fixed (permanent) or removable replacement teeth that are made to match your natural teeth.A person may need an implant if they have lost one or more teeth.mplants have several advantages. Implants are more natural and comfortable,have a higher success rate,improve chewing function,lead to a lower risk of cavities developing in nearby teeth and lead to better maintenance of bone at the site of the lost tooth.