Authors
Miguel Gómez-Polo, Solange Vasquez-Ramos, Marta Revilla-León, Rocío Cascos
Published in
Clinical oral implants research. Oct 14, 2026. Epub Oct 14, 2026.
Abstract
To evaluate and compare the positional accuracy of complete arch intraoral digital implant scans obtained using a conventional scan body protocol and a customized metallic ring-based calibrated framework.
A completely edentulous arch restored with six implants was scanned using two complete arch intraoral digital impression protocols: a conventional scan body protocol (SB) and a metallic ring-based calibrated framework (CF). Twenty scans were obtained per group using the same intraoral scanner. A coordinate measuring machine (CMM) dataset served as the reference standard. All STL files were imported into dental CAD software to design a standardized virtual implant-supported bar, which was subsequently analyzed using reverse engineering software. Linear inter-implant distances and angular deviations were calculated. Trueness was defined as the absolute deviation from the CMM reference, and precision as the variability among repeated scans. Between-group comparisons were performed using independent t-tests with Welch correction and Holm adjustment (α = 0.05).
The mean linear deviation was 0.034 (0.004) mm for CF and 0.124 (0.019) mm for SB (p < 0.01). The mean angular deviation was 0.31 (0.05) degrees for CF and 0.55 (0.10) degrees for SB (p < 0.01).
The calibrated splinting protocol showed greater trueness and lower variability compared with the conventional scan body approach.
PMID:
42870725
Bibliographic data and abstract were imported from PubMed on 14 Oct 2026.
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