The effect of scanning time and number of images on the accuracy of intraoral digital scans

48th Annual Conference of the European Prosthodontic Association, Nevşehir, Türkiye, 11 - 13 Eylül 2025, ss.1, (Özet Bildiri)

The effect of scanning time and number of images

on the accuracy of intraoral digital scans

Mihriban Uçar Kartal, Sabire Işler

(Istanbul University, Istanbul, Turkey)

OBJECTİVES: The accuracy of digital impressions is a critical

parameter that directly influences the success of prosthetic

treatments in digital dentistry. However, the effect of scanning

time and the number of images on the scanning accuracy

of intraoral scanners remains unclear.This study aimed to

evaluate the effect of scanning time and number of images on

the accuracy of digital scans.

MATERIALS AND METHODS: Tooth preparations were

completed on the reference model to receive a single crown on

tooth #16 and a three-unit fixed partial denture #24 to #26. The

reference model was digitized using a high-precision industrial

scanner (Solutionix C500). Digital impressions were then obtained

using three intraoral scanners: TRIOS 5 (3Shape), Medit i900

(Medit), and Aoralscan Elite (Shining 3D). Each group was scanned

according to the manufacturer’s recommended protocol, and

the scanning time and number of images were recorded for each

scan.The STL data were aligned with the reference model using

Geomagic Control X for 3D superimposition and Root Mean

Square (RMS) analysis. The comparisons of RMS values, number

of images, and scanning times were performed using the One-

Way ANOVA test. The relationship between RMS values and both

the number of images and scanning times was analyzed using

correlation analysis.

RESULTS: The Aoralscan Elite showed the lowest RMS

value among the scanners tested.No statistically significant

relationship was found between RMS values and either

scanning time or image count (p> 0.05).However, a positive

correlation was found between scanning time and the number

of images (p < 0.05, r > 0.7).

CONCLUSION: Under the conditions of this study, it was

observed that the type of intraoral scanner affects scanning

accuracy, whereas scanning time and the number of images do

not have a significant impact.Aoralscan Elite demonstrated the

highest scanning accuracy while also being the fastest device.

Funding: This project was supported by the Research

Universities Support Program (ADEP) with project number TSA-

2024-40536.

Keywords: digital impression, intraoral scanner, scanning

time, number of images, accuracy