Dental implants replace missing teeth by fusing with jawbone and supporting crowns, bridges, or dentures. Modern implants leverage osseointegration, where titanium forms a connection between bone and implant without the body rejecting it. Implants provide stable support so dentures and bridges don't slip, feeling more natural. There are two main types - endosteal implants surgically placed into the jawbone, and subperiosteal implants consisting of a metal frame fitted just below the gums.