Evaluation of the marginal and internal fit of interim crowns fabricated using AI-based dental CAD software
10.14368/jdras.2025.41.3.198
- Author:
Gyu-Ri KIM
;
Keunbada SON
;
Kyu-Bok LEE
- Publication Type:Original Article
- From:Journal of Dental Rehabilitation and Applied Science
2025;41(3):198-208
- CountryRepublic of Korea
- Language:English
-
Abstract:
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 conventionalsoftware and two AI-based dental programs. A uniform cement gap of 60 μm was set across all software, and 10 interim crownswere 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.
