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광경화성 3D 프린팅 레진의 출력각도에 따른 굽힘 특성과 신뢰성 평가

Evaluation of flexural properties and reliability with photo-curing 3D printing resin according to the printing orientations

대한치과기공학회지 2021년 43권 1호 p.13 ~ 18
임용운, 송두빈, 황성식, 김사학, 한만소,
소속 상세정보
임용운 ( Im Yong-Woon ) - Kyungdong University Department of Dental Technology
송두빈 ( Song Doo-Bin ) - Daejeon Health Institute of Technology Department of Dental Laboratory Technology
황성식 ( Hwang Seong-Sig ) - Kyungdong University Department of Dental Technology
김사학 ( Kim Sa-Hak ) - Kyungdong University Department of Dental Technology
한만소 ( 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° orientation exhibited higher FS and WOF than the 45° orientation.
Significant differences were found among the printing orientations (p<0.05). Specimens printed at the 0° orientation were the most accurate. In the Weibull analysis, 0° 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.

키워드

Flexural properties; Printing orientations; Size accuracy; Three-dimensional printer; Weibull analysis

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