Accuracy of Complete-Arch Implant Photogrammetry

This prospective comparative clinical study evaluated the accuracy and chairside time of complete-arch implant scans obtained using an intraoral photogrammetry system and a mobile-phone-based photogrammetry system in edentulous patients rehabilitated with complete-arch implant-supported prostheses. Implant positions recorded by each system were compared with a reference dataset to assess linear and angular discrepancies. The chairside time required for data acquisition was also measured. The study aimed to determine whether mobile-phone-based photogrammetry can provide clinically acceptable accuracy comparable to that of intraoral photogrammetry while improving clinical efficiency. The findings may help clinicians select appropriate digital impression techniques for complete-arch implant rehabilitation.

Inclusion Criteria: * Adults aged 18 years or older. * Completely edentulous patients rehabilitated with implant-supported complete-arch prostheses. * Presence of at least four osseointegrated implants in the edentulous arch. * Patients able to undergo digital implant scanning procedures. * Patients willing to participate and provide written informed consent. Exclusion Criteria: * Patients with unstable or failed implants. * Presence of peri-implant disease, active oral infection, or significant soft-tissue inflammation around the implants. * Inadequate access for placement of photogrammetry scan bodies or markers. * Patients with conditions that prevent proper scanning procedures (e.g., inability to maintain mouth opening or remain still during data acquisition). * Patients requiring immediate implant placement or immediate loading protocols. * Patients unwilling or unable to provide informed consent. * Incomplete clinical records or inability to complete all study procedures.