Accuracy comparison of buccal bite scans by five intra-oral scanners

Abstract

Purpose : The purpose of this study was to investigate the accuracy of the interocclusal relationship between upper and lower teeth according to the buccal interocclusal record scan using various intraoral scanner systems.

Materials and Methods : The upper and lower full arch Models with normal occlusion were scanned with 5 intraoral scanners (Cerec Omnicam, CS3500, iTero, Trios, True Definition). Buccal interocclusal record scan was taken only at the left side while occlusion was intentionally raised by 1 mm, 2 mm, 3 mm, and 4 mm with metal cylinder core embedded within polyvinylsiloxane bite registration material at the right molar region. The superimposition analysis was done to evaluate overall three-dimensional deviation and cross-section analysis was done to evaluate the degree and the direction of deviation of interocclusal relationship.

Results : From the superimposition study, Cerec Omnicam showed the least deviation (165.5 μm) and CS3500 (369.0 μm) showed the largest (P < 0.01). And the deviation was greater in 3, 4, 2 mm group than 1 mm (P < 0.01). From the cross-section study, Cerec Omnicam showed the farthest deviation (-242.8 μm) and CS3500 showed the closest deviation (312.5 μm) and a significantly high value was shown in 3 mm group.

Conclusion : Every intraoral scanner has different accuracy in reproducing interocclusal relationship.