Both systems are used for the rehabilitation of missing teeth, and the implants placed within the bone are the same. The difference lies in the variation of the prosthetic structure and the prosthetic abutments applied on top of the implants. Regular dental implants are preferred for single or multiple partial edentulous cases. All-on-4 systems are used for complete edentulous. Moreover, one of the most important advantages of All-on-4 systems is that they rarely require additional surgical procedures involving bone grafting and have a much shorter treatment duration.