Wear of 3D printed and CAD/CAM milled interim resin materials after chewing simulation

• DOI: 10.4047/jap.2021.13.3.144
• Publication Date: 2021-07-01T07:15:14Z
• Authors: Gerelmaa Myagmar; Jae-Hyun Lee; Jin-Soo Ahn; In-Sung Luke Yeo; Hyung-In Yoon; Jung-Suk Han
• Keywords: 3d printed; Interim

PURPOSE The purpose of this in vitro study was to investigate the wear resistance and surface roughness three interim resin materials, which were subjected chewing simulation. MATERIALS AND METHODS Three materials evaluated: (1) three-dimensional (3D) printed (digital light processing type), (2) computer-aided design manufacturing (CAD/CAM) milled, (3) conventional polymethyl methacrylate materials. A total 48 substrate specimens prepared. divided into two subgroups 30,000 or 60,000 cycles simulation (n = 8). volume loss compared. Statistical analysis performed using one-way variance Tukey's post-hoc test (α=.05). RESULTS mean ± standard deviation values (in mm3) against metal abrader after 0.10 0.01 for 3D resin, 0.21 0.02 milled 0.44 resin. Statistically significant differences among losses found order printed, (P<.001). After simulated chewing, (Ra; μm) 0.59 0.06, 1.27 0.49, 1.64 0.44, respectively. difference Ra value between (P=.01). CONCLUSION restorative additive subtractive digital technologies exhibited less than material showed a smoother chewing.