ABSTRACT
Objective@#To analyze implant survival rate and incidence rate of complications after All-on-4 implantation, and to discuss the technical points and consideration of All-on-4.@*Methods @#According to the criteria of inclusion and exclusion, 23 cases treated with All-on-4 immediate restoration were referred, from January 2007 to December 2015, including 5 cases of edentulous maxillary, 14 cases of edentulous mandibular and 4 cases of both maxillary and mandibular were edentulous. All the patients received immediate function with provisional prostheses at the surgery day. Definitive prostheses were delivered to patients after 3-6 months post operation and follow-up visits were performed up to 9 years (average 3 years) after placement of definitive prostheses.@*Results @# In this study, the rate of implant retention of 108 implants and 27 final restorations was 100% until the last review. Among the 23 patients, 3 patients had complications and the incidence of complications was 13.0%. @*Conclusion@# All-on-4 is an effective and reliable method in the treatment of dentures denture. The incidence of complications is low. All-on-4 is a practical method.