The Influence of Scanner Head Distance on Intraoral Scan Accuracy
Dr hab. Wojciech Ryniewicz1, Wiktor Wujek2, Prof. Małgorzata Pihut3
1 Zakład Protetyki Stomatologicznej, Katedra Protetyki Stomatologicznej i Ortodoncji, Instytut Stomatologii, Uniwersytet Jagielloński Collegium Medicum,
2 Poradnia Protetyki Stomatologicznej, Uniwersytecka Klinika Stomatologiczna w Krakowie,
3 Poradnia Protetyki Stomatologicznej i Ortodoncji, Instytut Stomatologii, Uniwersytet Jagielloński Collegium Medicum
Objectives
The field of digital dentistry is rapidly expanding in modern medicine. The ability to transfer many tasks traditionally performed manually by dental technicians to CAD/CAM software significantly impacts the speed, cleanliness, and especially the high precision of work.
The aim of the project was to analyze scans depending on the distance between the dental arch model and the intraoral scanner head, as well as to evaluate the influence of scanning distance on the accuracy of intraoral scanners.
Materials and Methods
To obtain intraoral scans, a phantom of the upper dental arch from KAVO was used. The model was scanned 10 times using a reference scanner to achieve a realistic spatial representation of dental structures.
Test scans scans were performed 10 times using intraoral scanners, 3Shape – Trios 4 and Carestream3600, at five distances from the dental arch: 0; 2.5; 5.0; 7.5; and 10 mm. All files were exported in .stl format and compared using the least squares method (best fit) in the Geomagic Control X program.
Results
The results of the conducted research, presented in the form of graphical maps, showed that the Trios 4 scanner exhibited the smallest deviation from the reference scan at distances of 2.5 and 5.0 mm from the dental arch. The differences between the scanners were relatively small.
Conclusions
The study results indicated that scanning distance was a variable affecting spatial representation accuracy.