A full arch—not four individual teeth
What is All-on-4 treatment?
All-on-4 describes a fixed full-arch dental prosthesis supported by four implants in the treated jaw. In the original concept, two implants are generally placed more vertically toward the front and two posterior implants are tilted. The final positions depend on the patient’s anatomy and restorative plan.
The four implants support one connected bridge; they do not replace only four teeth. Treatment of both upper and lower jaws usually means a separate plan and implant set for each arch.
All-on-4® is a Nobel Biocare trademarked treatment concept. Some providers use “all-on-four” more broadly. Ask which implant system and components are proposed, whether the branded protocol is intended, and what documentation you will receive.