What is an all on 3?
All on 3 is the short name for an implant supported prosthesis that is only on 3 implants instead of the traditional minimum of 4. It is definitely more controversial but seems to work well in the lower jaw.
All on 3 (AO3) research
The dental implants seem to hold up with same percentage but the prosthesis may have more issues according to Lima JOMI 2018. Mezzari JOMI 2019 has a 5 year study on the all on 3 showing 97% success at 5 years when done in the mandible.
The example below is from a multi-national study and is showing success. Kenji 2020 JOMI
All on 2 and all on 1 or fixed-on-1 and fixed-on-2
This can work in the right circumstance. It is very outside the normal treatment regimen though and should be a last effort on a very old patient opposing a denture. Cannizzaro JOI 2019
What are the steps for the AO3?
The steps are the same as any implant supported denture.