Marginal adaptation analysis of CAD/CAM resin crown with non-invasive methods

• DOI: 10.1007/s00784-025-06215-6
• Publication Date: 2025-02-26T02:04:34Z
• Authors: Chen Zeng; Tomoko Tabata; Rena Takahashi; Masaomi Ikeda; Junichi Shinagawa; Hisaichi Nakagawa; Yumi Tsuchida; Shunsuke Takano; Yasunori Sumi; Yasushi Shimada

Abstract Objectives This study compared the silicone replica method with swept-source optical coherence tomography (SS-OCT) to analyze marginal adaptation and investigated effect of light incidence angle SS-OCT on measurement precision. Materials methods A typodont-prepared mandibular right first molar was scanned using an intraoral scanner (Trios 3). Fourteen crowns were fabricated from CAD/CAM resin blocks (Katana Avencia P) a 5-axis milling machine (DWX-50). Marginal at buccal, lingual, mesial, distal points assessed angles 60°, 75°, 90°. Statistical comparisons performed two-way analysis variance (ANOVA) t-tests Bonferroni correction, significance level 0.05. Results At showed significantly larger discrepancies than mesial ( p < 0.05). only lingual point value 90°, no significant differences observed between > discrepancy values increased as changed 90° 75° 60° buccal Conclusions is viable alternative for assessing 90 °. Clinical relevance SS-OCT, non-invasive method, has potential be applied clinically evaluating fit in indirect restorations vivo.