Accuracy of Buccal Scan Procedures for the Registration of Habitual Intercuspation

Abstract

Intraoral scanning devices allow the reproduction of the static relationship of the maxillary and mandibular teeth with the same accuracy as registration methods with poured model casts.

Influence of Edentulous Conditions on Intraoral Scanning Accuracy of Virtual Interocclusal Record in Quadrant Scan

“…However, a previous study, which was done in the quadrant arch, showed comparable results. In the study of Zimmermann et al, the total translation of the VIR in a complete dentate quadrant arch was at 66.6 µm in Trios 3 [9]. In our study, the median unsigned difference of the FPS group in the Trios3 ranged from 10.5 µm in position 3 to 31.2 µm in position 7.…”

“…Therefore, a prosthesis fabricated in a position with a (+) Signed difference may show high occlusion and the reverse may show infra occlusion [1]. Zimmermann et al reported that there was no significant difference between the conventional methods and various IOSs when compared rotation of VIR in a complete dentate quadrant arch scan [9]. In our study, a tilting effect was observed in the quadrant arch scan with the absence of posterior support or with more than two missing teeth.…”

“…Previous studies about the accuracy of the VIR had a limitation in that there was no evaluation for the distortion of the arch scan data itself, even though the full arch model was used to assess the VIR [9,12,13,15]. Gintaute et al evaluated the accuracy of VIR using the total occlusal surface area [12].…”

“…Buccal bite registration is used in most IOS systems to obtain the virtual interocclusal record (VIR) of the maxillary and mandibular arches. This method is defined as intraoral digital scans capturing the buccal surface of approximately three teeth of both arches in maximum intercuspation [9]. Using the software matching process of each IOS system, both buccal scan images and intraoral scans of the maxillary and mandibular arch are automatically aligned [10].…”

“…However, there is rare information about the accuracy of VIR from quadrant scans under various edentulous conditions. Although Zimmermann et al studied the accuracy of VIRs in quadrant scans by various IOSs [9] and Ren et al studied the accuracy of VIRs in full-arch scans of different edentulous conditions [13], to the best of our knowledge, no study has evaluated the accuracy of VIRs in quadrant scans under varying partial edentulous conditions. Moreover, it is uncertain how the span and location of the edentulous area in the quadrant scan affect the accuracy of VIRs.…”