Evaluation of the marginal and internal fit of interim crowns fabricated using AI-based dental CAD software

초록

Purpose: This study aimed to assess the marginal and internal fit of interim crowns fabricated using artificial intelligence (AI)-based dental computer-aided design (CAD) software. Materials and Methods: The right maxillary first molar was prepared for an interim crown. Scan files were obtained using a desktop scanner and exported to three dental CAD software programs: a conventional software and two AI-based dental programs. A uniform cement gap of 60 μm was set across all software, and 10 interim crowns were designed. The crowns were fabricated using a 3D printer, and their marginal and internal fit was evaluated using the silicone replication technique. Statistical analysis was performed using the Kruskal-Wallis test and post hoc analysis (α = 0.05). Results: A significant difference in marginal fit was observed among the three dental CAD software programs (P < 0.05). The marginal gap produced by 3Shape was significantly greater than that of the two AI-based programs (P < 0.05). No significant differences were observed in most areas regarding internal fit (P > 0.05), although Single-Pro exhibited a significantly larger occlusal gap (P < 0.05). Conclusion: The interim crowns fabricated using Dentbird and Single-Pro demonstrated excellent marginal fit. However, further refinement is necessary, as the occlusal area of the internal fit in Single-Pro exhibited a comparatively larger gap.

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