What All-on-4 actually is
All-on-4 replaces a full arch of teeth with four strategically placed and angled implants supporting one fixed bridge. The back two implants are tilted to reach denser bone toward the front of the jaw, which is often enough to skip a bone graft that a different implant approach might require. It's the most common full-arch technique we place, and for most patients with reasonably preserved bone, four implants is genuinely sufficient to support a lifetime of chewing.