All-on-4

thumb|300px|Technique depicted in 3D video thumb|This image shows how Nobel Biocare's All-on-4 solution works The term All-on-4, also known as All-on-Four and All-in-Four, refers to 'all' teeth being supported 'on four' dental implants. The name All-on-4 is a registered trademark of Nobel Biocare, used globally for both dental products and services. The treatment concept is a prosthodontics procedure for total rehabilitation of the edentulous (toothless) patient, or for patients with badly broken down teeth, decayed teeth, or compromised teeth due to gum disease. It consists of the rehabilitation of either edentulous or dentate maxilla and / or mandible with fixed prosthesis by placing four implants in the anterior maxilla, where bone density is higher. The four implants support a fixed prosthesis with 10 to 14 teeth, and it is placed immediately, typically within 24 hours of surgery.

The All-On-4 solution, with the latest technology in computer aid design/Mill (cad/cam) has evolved including the All-on-bar concept, which is adding a milled titanium bar structure to the dental implants, which helps them working together to protect the implants from failure, even after the hybrid bridge is broken. This concept helps the clinician provide a better long-lasting solution, instead of a conversion-denture which is a chair side repair and modified denture. The All-On-Bar reduces the appointments, eliminating the Denture Conversion technique, by replacing it with a long lasting hybrid. Some patients keep this option as their final due to a lower budget or because the space is limited for other final solutions.