Does the Learning Curve for Intraoral Scanning Vary Depending on the Device?

Abstract

Objectives: Digital impressions using intraoral scanners (IOS) are replacing conventional impressions, requiring a learning process. This study compared the learning curves of 29 dentists with no prior IOS experience, randomly assigned to groups: Eagle, Omnicam- AF, and IS-3700.

Methods: After a lecture, participants performed three full scans (maxilla, mandible, and occlusion record) on a phantom and completed a survey about their experience. Scanning times to achieve adequate scans were recorded, and Wright's model was used to estimate the number of trials required for proficiency. Statistical analyses used Kruskal-Wallis and Chi-Square tests.

Results: Proficiency was achieved after 10 trials with Eagle and 11 trials with Omnicam-AF and IS-3700. Participants using IS- 3700 reached the plateau faster (167.9 s) than those using Eagle (245.5 s, P=0.041) and Omnicam-AF (260.6 s, P=0.014). While all groups appreciated the time-saving benefits over conventional impressions, 60-70% identified the need for further training.

Conclusion: Despite similar trials required for proficiency, differences in average scanning times suggest that IOS characteristics may influence learning efficiency and user perceptions.

Clinical relevance: Understanding learning curves and device-specific performance can help optimize IOS training programs and guide clinicians in adopting digital workflows effectively.