For prosthodontic practices explaining All-on-4 mechanics — posterior-angled implants and pin-style abutments let patients visualize and feel how the full-arch fixed restoration functions.

Lower denture model on 4 "pin style" abutments. The posterior implants are at a 30 degree angle. This method is called the "all on 4". The denture is removable and is available in upper and lower model.