Project overview
This in vitro study evaluated the effectiveness of digital impression techniques compared to conventional methods in minimizing marginal discrepancies in dental restorations. Fifty extracted premolars were prepared and divided into four groups: one using traditional polyvinyl siloxane (PVS) impressions and three using different intraoral digital scanners. Zirconia crowns were fabricated for all samples, and marginal gaps were measured using stereomicroscopy. Results showed significantly lower mean marginal discrepancies in all digital groups compared to the conventional group, with Scanner 1 achieving the smallest average gap. Although minor numerical differences existed among the digital scanners, they were not statistically significant. Additionally, digital techniques demonstrated reduced cement thickness and potential for better clinical fit. The findings suggest that digital impressions offer superior marginal accuracy and may reduce complications.
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