The Journal of prosthetic dentistry · 2026
Complete arch accuracy of six intraoral scanning devices: A clinical study.
СтатьяСравнительное исследованиеНазвание и аннотация: Перевод пока не подготовлен
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Ender Andreas, Buhl Jenny, Mehl Albert
Аннотация
STATEMENT OF PROBLEM: Intraoral scanning systems have been replacing conventional workflows in dentistry as the primary method of documentation, diagnosis, and treatment. Despite their growing adoption, the accuracy of complete arch scans remains a critical challenge.
PURPOSE: The aim of this clinical study was to evaluate and compare the precision and trueness of 6 current intraoral scanners (IOS) for complete arch recording using a conventional high-precision impression technique as the control group.
MATERIAL AND METHODS: In 10 participants, 3 complete arch scans of the maxillary and mandibular jaws were obtained using 6 IOSs - Emerald S (EME); MEDIT i900 (MED); Primescan (PRI); Primescan 2 (PS2); Aoralscan 3 (SHI); TRIOS 5 (TRI) - and 1 conventional impression (CONV) technique. CONVs were poured and digitized using a laboratory scanner. Precision was assessed from intragroup pairwise comparison, while trueness values were calculated by comparing IOS scan data with the corresponding conventional impressions using (90_10)/2-percentile values. Statistical analyses were performed using Welch ANOVA followed by Games-Howell post hoc tests and a linear mixed-effects model (P=.05).
RESULTS: Precision values ranged from 21 ±4 µm for CONV up to 82 ±38 µm for group EME. CONV showed significantly higher precision compared with all IOSs (P>.05). No significant difference was found among PRI, PS2, MED or between SHI and TRI (P>.05). Trueness values ranged from 41 ±10 µm (PRI) up to 96 ±29 µm (EME). A significant effect of scanner group on trueness was found (P<.001), but no significant differences were detected between MED and PS2, between PRI and PS2, or between SHI and TRI (P>.05).
CONCLUSIONS: For dentate complete arch recordings, the standard remains conventional high-precision material. Among IOSs, significant differences concerning accuracy were found for complete arch scans, but they did not exceed 100 µm.
PURPOSE: The aim of this clinical study was to evaluate and compare the precision and trueness of 6 current intraoral scanners (IOS) for complete arch recording using a conventional high-precision impression technique as the control group.
MATERIAL AND METHODS: In 10 participants, 3 complete arch scans of the maxillary and mandibular jaws were obtained using 6 IOSs - Emerald S (EME); MEDIT i900 (MED); Primescan (PRI); Primescan 2 (PS2); Aoralscan 3 (SHI); TRIOS 5 (TRI) - and 1 conventional impression (CONV) technique. CONVs were poured and digitized using a laboratory scanner. Precision was assessed from intragroup pairwise comparison, while trueness values were calculated by comparing IOS scan data with the corresponding conventional impressions using (90_10)/2-percentile values. Statistical analyses were performed using Welch ANOVA followed by Games-Howell post hoc tests and a linear mixed-effects model (P=.05).
RESULTS: Precision values ranged from 21 ±4 µm for CONV up to 82 ±38 µm for group EME. CONV showed significantly higher precision compared with all IOSs (P>.05). No significant difference was found among PRI, PS2, MED or between SHI and TRI (P>.05). Trueness values ranged from 41 ±10 µm (PRI) up to 96 ±29 µm (EME). A significant effect of scanner group on trueness was found (P<.001), but no significant differences were detected between MED and PS2, between PRI and PS2, or between SHI and TRI (P>.05).
CONCLUSIONS: For dentate complete arch recordings, the standard remains conventional high-precision material. Among IOSs, significant differences concerning accuracy were found for complete arch scans, but they did not exceed 100 µm.