Chung, Yoo-Jin; Park, Ji-Man; Kim, Tae-Hyung; Ahn, Jin-Soo; Cha, Hyun-Suk; Lee, Joo-Hee
Materials (Basel, Switzerland)
2018Sep ; 11 ( 10 ) :.
PMID : 30248955
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Chung, Yoo-Jin - Division of Prosthodontics, Department of Dentistry, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea. wlsloo89@naver.com.
Park, Ji-Man - Department of Prosthodontics, College of Dentistry, Yonsei University, 250 Seongsanno, Seodaemun-gu, Seoul 03722, Korea. jimarn@yuhs.ac.
Kim, Tae-Hyung - Division of Restorative Sciences, Herman Ostow School of Dentistry of University of Southern California, Los Angeles, CA 90089-0641, USA. thk@usc.edu.
Ahn, Jin-Soo - Department of Dental Biomaterials Science and Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea. ahnjin@snu.ac.kr.
Cha, Hyun-Suk - Division of Prosthodontics, Department of Dentistry, Asan Medical Center, College of Medicine, University of Ulsan, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea. chahyunsuk@hanmail.net.
Lee, Joo-Hee - Division of Prosthodontics, Department of Dentistry, Asan Medical Center, College of Medicine, University of Ulsan, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea. ljhl11911@hanmail.net.
ABSTRACT
3D printing of denture artificial teeth with resin materials is worthy of study in a novel way. This study evaluated chipping and indirect tensile fracture resistance of 3D printing resin material (Dentca 3D printing denture teeth resin) compared with conventionally prefabricated resin denture teeth (Premium-8, Surpass, SR-Orthosit-PE, and Preference). One hundred tooth specimens were prepared for testing. The 3D printed tooth specimens were printed at a 50 μm layer thickness with methacrylate-based photopolymerized resin by stereolithography 3D printing. Chipping and indirect tensile fracture tests were conducted at a speed of 1 mm/min until fracture. The indirect tensile fracture loads of the 3D printed resin teeth were higher than those of Premium-8, Surpass, and SR-Orthosit-PE, and lower than those of Preference teeth. Regarding chipping resistance, the 3D printed resin teeth were not different from Surpass and SR-Orthosit-PE, and were lower than Premium-8 and Preference teeth. The 3D printed resin teeth exhibited vertical fracture of the loaded cusp without deformation in chipping. The 3D printed resin teeth showed simultaneous fracture of two cusps in indirect tensile fracture, unlike other teeth. The results of this study suggest that 3D printing technology using resin materials provides adequate fracture resistance for denture artificial tooth use.
keyword
3D printing; CAD/CAM; denture; fracture; resin
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