Comparative study on the accuracy of different SmartX scanning strategies in full-arch implant prosthetic digital impressions

doi:10.12337/zgkqzzxzz.2025.12.010

Abstract

Abstract: Objective To evaluate the trueness of SmartX intraoral scanning (IOS) for full-arch digital implant impressions and to compare the impact of different scanning strategies on accuracy. Methods Scan bodies were arranged in two configurations (along-the-ridge and centripetal) on three all-on-6 maxillary models. SmartX IOS performed 60 scans (3 models × 2 strategies × 10 repetitions). Desktop scanner data served as a reference. IOS scans were compared against reference scans, assessing trueness and precision via distance/angular deviations between implant abutments and root mean square (RMS) errors. Results For along-the-ridge scans: distance deviation = 75.25 (45.35, 136.40) μm, angular deviation = 0.47°±0.22°, RMS = 88.05 (67.75, 99.88) μm. For centripetal scans: distance deviation = 113.90 (81.93,315.60) μm, angular deviation = 0.27°±0.18°, RMS = 93.75 (73.58, 98.85) μm. Mann-Whitney U and paired-samples t-tests indicated significant precision differences between strategies (P<0.05). Conclusion Both SmartX strategies produced clinically acceptable deviations below passive fit thresholds for full-arch digital impressions. Scanning strategy is one of the key factors affecting the impression precision of the system.

Key words: Full-arch implant, Intraoral scanning, Trueness, Precision, In vitro study

Gu Yanyan, Wang Yuzhuo, Fu Yuanfei, Wang Jie. Comparative study on the accuracy of different SmartX scanning strategies in full-arch implant prosthetic digital impressions[J]. Chinese Journal of Oral Implantology, 2025, 30(6): 574-579.

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