Accuracy of Complete-Arch Implant Digital Impressions Using Photogrammetry and Intraoral Scanning

This clinical study evaluates and compares the accuracy (trueness and precision) of intraoral photogrammetry and intraoral scanning for complete-arch implant-supported prostheses in patients initially treated according to All-on-4 or All-on-6 concepts. Conventional impressions serve as the reference for assessing trueness. One patient initially treated with six implants lost one implant before impression acquisition and was therefore evaluated with five remaining implants.

Inclusion Criteria: * Adults ≥18 years * Edentulous maxilla or mandible * All-on-4 or All-on-6 implant supported restoration * Ability to provide informed consent Exclusion Criteria: * Severe systemic diseases (ASA III+) * Bisphosphonate therapy * Heavy bruxism * Inability to attend follow-up