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

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 m 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 ( = 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.(