A dental implant is a permanent replacement for a missing tooth. Dental implants can be used to support a single missing tooth, multiple missing teeth or can provide support for your denture increased its stability in the mouth. An implant is an artificial titanium screw that is placed in the jaw bone where your natural root used to be. This titantium screw then anchors the crown, bridge or denture. Dental implants are thought to be closest alternative to having your own natural teeth.