Relationship between resolution and accuracy of four intraoral scanners in complete-arch impressions

Journal of Clinical and Experimental Dentistry
Priscilla Medina-SotomayorIsabel Camps

Abstract

The scanner does not measure the dental surface continually. Instead, it generates a point cloud, and these points are then joined to form the scanned object. This approximation will depend on the number of points generated (resolution), which can lead to low accuracy (trueness and precision) when fewer points are obtained. The purpose of this study is to determine the resolution of four intraoral digital imaging systems and to demonstrate the relationship between accuracy and resolution of the intraoral scanner in impressions of a complete dental arch. A master cast of the complete maxillary arch was prepared with different dental preparations. Using four digital impression systems, the cast was scanned inside of a black methacrylate box, obtaining a total of 40 digital impressions from each scanner. The resolution was obtained by dividing the number of points of each digital impression by the total surface area of the cast. Accuracy was evaluated using a three-dimensional measurement software, using the "best alignment" method of the casts with a highly faithful reference model obtained from an industrial scanner. Pearson correlation was used for statistical analysis of the data. Of the intraoral scanners, Omnicam is the syst...Continue Reading

Citations

Dec 21, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Marta Revilla-LeónVinayak Raman Krishnamurthy
Mar 8, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·So Hyeon ParkMarta Revilla-León
Mar 23, 2021·Caries Research·Corinna WitecyMaximiliane A Schlenz

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Software Mentioned

iTero
Omnicam
Geomagic Control
CHORD ERROR
True
ATOS

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