Journal of Prosthodontics News
Effects of Complete-Arch Digital Scanning Techniques on the Passive Fit of CAD/CAM Verification Devices
Now online in the Journal of Prosthodontics, an evaluation of the impact of different complete-arch digital scanning techniques on the passive fit of CAD/CAM verification devices co-authored by ACP members Chao-Chieh Yang DDS, MSD, FACP, Amirali Zandinejad DDS, MSc, Dean Morton DDS, MS, FACP, Toshiki Nagai DDS, MSD, and Wei-Shao Lin DDS, PhD, MBA, FACP.
A mandibular master cast with four multiunit abutment implant analogs was used as the basis for fabricating verification devices through three impression techniques. Group 1 employed a conventional open-tray impression technique using polyvinyl siloxane material, Group 2 utilized digital scans of splinted scanbodies reinforced with a light-polymerizing acrylic resin and metal mesh, and Group 3 applied digital scans of reverse scanbodies connected to a passively fitting interim prosthesis.
A total of 60 CAD/CAM verification devices were fabricated, including 10 milled and 10 3D-printed devices across the three groups. The misfit of verification devices was assessed using visual inspection, tactile sensation, and a one-screw test.
Milled verification devices exhibited superior passive fit compared to 3D-printed devices across all groups. The Group 1 conventional open-tray technique with milled devices achieved a misfit percentage of 0%, significantly outperforming other groups. Conversely, 3D-printed verification devices demonstrated higher misfit rates, limiting their clinical applicability for verifying implant positions in complete-arch prostheses.
Asavanant N, Yang C-C, AlQallaf H, Zandinejad A, Morton D, Nagai T, et al. Effects of complete-arch digital scanning techniques on the passive fit of CAD-CAM verification devices. J Prosthodont. 2025; 1–8. https://doi.org/10.1111/jopr.14084
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