Fig. 4From: Evaluation of surgical techniques in survival rate and complications of zygomatic implants for the rehabilitation of the atrophic edentulous maxilla: a systematic reviewDistribution of the type of ZAGA classification between eligible studies [14, 37, 39, 41, 43] and ZAGA studies [15, 46]. ZAGA-A evaluated the anterior ZI’s distribution in the ZAGA classification, and ZAGA-P evaluated the posterior ZI’s distribution [46]Back to article page