Fig. 2From: The All-on-four concept for fixed full-arch rehabilitation of the edentulous maxilla and mandible: a longitudinal study in Japanese patients with 3–17-year follow-up and analysis of risk factors for survival rateProsthetic protocol. a Pretreatment of impression (connected to each impression coping). b Impression. c Immediate loading with provisional restoration after operation. d Final restorationBack to article page