Top Candidates For All On 4 Dental Implants People with several failing or missing teeth. People who are in need of multiple dental implants. People who wear dentures. With the All-on-4™ dental implants procedure, qualified patients receive a minimum four implants and a full set of new replacement teeth in just one appointment. The real appeal is how quickly permanent implants can be placed, while you sleep, so that patients can leave the same day with fixed, non-removable replacement teeth.