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Evaluation of flexural properties and reliability with photo-curing 3D printing resin according to the printing orientations
ÀÓ¿ë¿î, ¼ÛµÎºó, Ȳ¼º½Ä, ±è»çÇÐ, ÇѸ¸¼Ò,
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ÀÓ¿ë¿î ( Im Yong-Woon ) - Kyungdong University Department of Dental Technology
¼ÛµÎºó ( Song Doo-Bin ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology
Ȳ¼º½Ä ( Hwang Seong-Sig ) - Kyungdong University Department of Dental Technology
±è»çÇÐ ( Kim Sa-Hak ) - Kyungdong University Department of Dental Technology
ÇѸ¸¼Ò ( Han Man-So ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology
Abstract
Purpose: This study aimed to compare the flexural properties and perform the Weibull analysis of photo-curing three-dimensional (3D) printing resin.
Methods: Photo-curing temporary resin (3D polymer) was used as a printing resin. Specimens (65 ¡¿ 10 ¡¿ 3.3 mm3) were prepared following the ISO 20975-1 guidelines and according to the different printing orientations using a digital light processing 3D printer (D2 120; Dentium). The flexural strength (FS), flexural modulus, and work of fracture (WOF) were measured using a universal testing machine (Instron 3344; Instron) at a crosshead speed of 5 mm/min.
Results: In this study, the 0¡Æ orientation exhibited higher FS and WOF than the 45¡Æ orientation.
Significant differences were found among the printing orientations (p<0.05). Specimens printed at the 0¡Æ orientation were the most accurate. In the Weibull analysis, 0¡Æ showed the greatest Weibull modulus (m), which represents a higher reliability.
Conclusion: 3D printing should be selected and used by considering flexural properties, size accuracy, and reliability.
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Flexural properties; Printing orientations; Size accuracy; Three-dimensional printer; Weibull analysis
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