Journal of Prosthodontics News
October 9, 2026
Comparative Trueness of Complete-Arch Implant Position Acquisition Using Intraoral Scanning and Photogrammetry
Now online in the Journal of Prosthodontics, an in vitro study comparing trueness of implant position acquisition co-authored by ACP members Mohamed Sherif Omar BDS, MSc, Toshiki Nagai DDS, MSD, Chao-Chieh Yang DDS, MSD, and Wei-Shao Lin DDS, MBA, MSAI, PhD.
This study compared the trueness of four techniques for complete-arch implant position acquisition: intraoral implant scanning (IOIS) using auxiliary geometric devices (AGDs), IOIS using horizontally extended noncalibrated scanbodies (NCSBs), smartphone-based extraoral photogrammetry (EPG), and EPG with a dedicated scanner.
A mandibular edentulous stone cast with four straight multiunit abutment analogs positioned at sites #19, #22, #27, and #30 was used. Four experimental groups were evaluated: DynamicAbut, using AGD-aided IOIS; TruAbut, using horizontally extended NCSBs; PICApp, using smartphone-based EPG; and MicronMapper, using dedicated EPG.
Primary outcomes were mean per-implant axis deviation, pooled interimplant distance deviation, and pooled interimplant angulation deviation. Secondary outcomes included pairwise interimplant deviations and short-span versus long-span comparisons.
Within the limitations of this in vitro study, photogrammetric systems, whether smartphone-based or dedicated, provided the most favorable interimplant distance trueness and demonstrated stable performance across different span lengths. Technique selection should be guided by the geometric demands of the clinical situation, particularly span length and angular tolerance, rather than by assuming universal superiority of a single acquisition method.
Omar MS, Lan Y-H, Nagai T, Yang C-C, Lin W-S. Comparative trueness of complete-arch implant position acquisition using auxiliary geometric device–aided and noncalibrated scanbody–based intraoral scanning versus smartphone-based and dedicated extraoral photogrammetry. J Prosthodont. 2026; 1–11. https://doi.org/10.1111/jopr.70244
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