ASSESSEMENT OF INTRA-ORAL SCANNER BITE REGISTRATION AT MAXIMAL INTERCUSPAL POSITION

Objectives: This study aimed to compare the occlusal contacts (OC) in adults with class I occlusion between the traditional articulating paper and the intraoral scanner (IOS).
Methods: A total of 22 participants with class I occlusion and stable maximal intercuspal position (MIP) were recruited. The occlusal contacts were recorded using 40µm articulating paper (Bausch, Germany). The upper OC color marks were collected by an intra-oral scanner (Trios3, 3Shape, Denmark). Next, the digital OC was collected from a bite-scan file from the buccal side for the same participant. Finally, Geomagic Design X 2020 (Artec 3D, Luxembourg) was used to compare the occlusal contacts between two groups of OC data.
Results: The number of OC recorded by 40µm articulating paper and by IOS were 41.89±6.34 points and by IOS were 33.17±9.04, simultaneously. The difference was statistically significant (p<0.05). The strength of agreement on the location of the OC points assessed by Cohen's Kappa K= 0.391 (K>0.4), at a moderate level.
Conclusions: Bite registration by intra-oral scanners may be acceptable in clinical practice. However, more studies are needed.