All on 4 is a dental implant treatment that involves placing four dental implants in both jaws or either jaw, and attaching a full set of replacement teeth (also known as a dental bridge) to the implants. The treatment is designed to provide a secure, stable, and natural-looking replacement for missing teeth. The material most commonly used for all on 4 dentures is acrylic.The All on 4 treatment is generally suitable for individuals who are missing all of their teeth in one or both jaws, or who have badly damaged teeth that cannot be repaired. It is also an option for individuals who are not suitable candidates for traditional dental implants due to bone loss in the jaw or other factors.