Evaluation of the marginal and internal fit of a single crown fabricated based on a threedimensional printed model

• Published in: The journal of advanced prosthodontics 2018, 10(5), 48, pp.367-373
• Main Authors: 장연, 심지영, 박종경, 김웅철, 김혜영, 김지환
• Format: Article
• Language: English
• Subjects: 치의학
• ISSN: 2005-7806; 2005-7814
• DOI: 10.4047/jap.2018.10.5.367

PURPOSE. To evaluate the fit of a crown produced based on a 3D printed model and to investigate its clinical applicability. MATERIALS AND METHODS. A master die was fabricated with epoxy. Stone dies were fabricated from conventional impressions (Conventional stone die group: CS, n=10). Digital virtual dies were fabricated by making digital impressions (Digital Virtual die group: VD, n=10). 3D data obtained from the digital impression was used to fabricate 3D printed models (DLP die group: DD, n=10, PolyJet die group: PD, n=10). A total of 40 crowns were fabricated with a milling machine, based on CS, VD, DD and PD. The inner surface of all crowns was superimposed with the master die files by the “Best-fit alignment” method using the analysis software. Oneway and 2-way ANOVA were performed to identify significant differences among the groups and areas and their interactive effects (α=.05). Tukey’s HSD was used for post-hoc analysis. RESULTS. One-way ANOVA results revealed a significantly higher RMS value in the 3D printed models (DD and PD) than in the CS and DV. The RMS values of PD were the largest among the four groups. Statistically significant differences among groups (P