
The study aimed to investigate the effect of an intraoral scanner (IOS) and implant-supported fixed partial denture (FPD) situation on the scan accuracy of two implants. Tissue-level implants were placed in three maxillary models, and partial-arch scans were performed using two IOSs (CEREC Primescan and TRIOS 3). Results showed that the trueness of the scans was affected by IOS and FPD situation when 3D distance deviations were considered, while inter-implant distance, mesiodistal angular, and buccopalatal angular deviations were only affected by the FPD situation. Scan precision was affected by the interaction between the IOSs and the FPD situation. The study concluded that posterior 3-unit FPD implant scans performed using CEREC Primescan had accuracy either similar to or better than the other tested combinations.
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