Augmented-reality-assisted intraoral scanning: An andragogical study

The aims of the present study were to (a) compare the scanning time and image count to complete optical scans of a typodont between augmented-reality-assisted intraoral scanning (ARIOS) and intraoral scanning (IOS), (b) compare the precision of the scan data derived from ARIOS and IOS, (c) compare participant-related outcomes between ARIOS and IOS, and (d) evaluate the effect of andragogical training in enhancing operator proficiency.

A multisession within-subject experiment was conducted to compare ARIOS and IOS. Twenty-five dental students participated in the study. A training session was done to procure familiarity with both experimental conditions. The trial session consisted of each participant performing three sets of optical scans of a typodont under ARIOS and IOS. The time required to complete the scan and the number of images taken were recorded. Participant feedback was collected by means of entry, exit, and NASA-Task Load Index surveys. Precision of the scanned data was measured in root mean square (RMS).

The present study observed a 7:3 preference for ARIOS at the exit survey. Scanning efficacy from ARIOS to IOS found an 8.5% decrease in mandibular scanning time, a 10.5% decrease in maxillary scanning time, an 8.6% decrease in mandibular scanning image count, and a 9.3% decrease in maxillary image count in favor of ARIOS. Precision of the scan data between ARIOS and IOS was comparable in RMS.

Andragogical practice of training enhanced participants' proficiency with ARIOS. ARIOS was advantageous compared to IOS in scanning efficacy, ergonomics, ease of use, and overall workload.