Trueness, physical properties, and surface characteristics of additive-manufactured zirconia crown

• Published in: Journal of the mechanical behavior of biomedical materials 2024-06, Vol.154, p.106536-106536, Article 106536
• Main Authors: Cho, Su-Min, Young Kim, Ryan Jin, Park, Ji-Man, Chung, Hye-Min, Kim, Deok-Yeong
• Format: Article
• Language: English
• Subjects: Computer-Aided Design; Crowns; Surface characteristics; Surface Properties; Trueness; X-Ray Microtomography; Zirconia; Zirconium
• ISSN: 1751-6161; 1878-0180
• DOI: 10.1016/j.jmbbm.2024.106536

This study aimed to conduct a comparison of trueness and physical and surface properties among five distinct types of additive manufactured (AM) zirconia crowns and zirconia crowns produced using the subtractive manufacturing (SM). Zirconia crowns were fabricated using five distinct techniques, each varying in the method of slurry transfer and photocuring source. Each experimental group utilized either one of the four digital light processing (DLP)-based techniques (DLP spreading, DLP spreading gradation, DLP vat and DLP circular spreading) or the stereolithography (SLA)-based technique (SLA spreading). The control (CON) group employed SM. To assess accuracy, trueness was measured between the scan and reference data. To analyze the physical properties, voids were examined using high-energy spiral micro-computed tomography scans, and the crystal structure analysis was performed using X-ray diffraction (XRD). Surface roughness was assessed through laser scanning microscopy. Differences in the trueness of internal surfaces of crowns were found among the groups (P