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치과 3D 프린팅용 자외선 경화 레진에 광원의 두 가지 파장에 따른경화 및 항온수조 침적에 따른 변형률의 비교 분석

Comparative analysis of strain according to two wavelengths of light source and constant temperature bath deposition in ultraviolet-curing resin for dental three-dimensional printing

대한치과기공학회지 2020년 42권 3호 p.208 ~ 212
김동연, 이광영, 강후원, 양천승,
소속 상세정보
김동연 ( Kim Dong-Yeon ) - 4RD Dental Laboratory
이광영 ( Lee Gwang-Young ) - Wonkwang Health Science University Department of Dental Laboratory Technology
강후원 ( Kang Hoo-Won ) - Donga University of Health Department of Dental Laboratory
양천승 ( Yang Cheon-Seung ) - Donga University of Health Department of Dental Laboratory

Abstract


Purpose: This study aimed to analyze the shrinkage and expansion strain of ultraviolet (UV)- cured resin according to the wavelength of the light source and compare the shrinkage and expansion.

Methods: We prepared the mold with according to the ISO 4049 specimen. The size of the circle in the mold was prepared with a height of 6.02 mm and a diameter of 4 mm. UV-curable resin for three-dimensional (3D) printing was injected into the circular mold. The control group was irradiated with a wavelength of 400~405 nm using UV-curing equipment (400 group), and the experimental group was irradiated with a wavelength of 460~465 nm (460 group). Both groups were produced ten specimens. The produced specimen was first measured with a digital micrometer. After the first measurement, the specimen was immersed in a constant temperature water bath for 15 days, after which the second measurement was performed, and the third measurement was taken after 30 days. The measured values were analyzed using the independent sample t-test (α=0.05).

Results: In the non-immersion water tank, the contraction was 0.9% in the 400 group and 1.3% in the 460 group. In the constant temperature bath, the expansion was high at ?0.4% in the 400 group for 15 days, and the smallest expansion was ?0.03% for the 400 group for 30 days. There were significant differences between the two groups (p<0.05).

Conclusion: The 400 group had a lower UV resin specimen strain than the 460 group. Therefore, it is recommended to use the wavelength required by the UV-curing resin.

키워드

Printing; Resins; Three-Dimensional; Ultraviolet; Wavelength

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