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KMID : 1035320190460030139
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Korean Society for Dental Materials
2019 Volume.46 No. 3 p.139 ~ p.152
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Comparison of physical properties of the various 3D printing temporary crown and bridge resin
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Park Seo-Jin
Lee Han-Ah
Lee Sang-Hyeok
Seok Soo-Hwang
Lee Bum-Soon
Kwon Jae-Sung
Kim Kwang-Mahn
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Abstract
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Conventional dental resins for crown and bridge fulfill ISO 10477 and ISO 10993 before clinical application. Although 3Dprinting or rapid prototyping (RP) for the fabrication of temporary crown and bridge have been proposed, a little studies werereported for 3D printing resin for temporary crown and bridge. The purpose of this study was to evaluate the physical properties(such as water sorption and solubility, color stability and flexural strength) of the various 3D printing temporary crown andbridge resin following the ISO 10477:2018 and estimate the effect of chemical composition of resin on the physical properties.
Four resins approved by KFDA and 4 experimental resins developed by different manufacturer were tested in this study. Sampleswere prepared with DLP typed 3D Printer (G-Printer) and post-cured using UV-light Cure Unit (Cure M). Proper 3D printingand post-curing conditions were selected for different 3D printing resins. Each test was performed according to the ISO 10477and results were statistically analyzed using Tukey-multiple comparison test (p=0.05). Only group-B did not satisfied the ISOrequirement (< 40 μg/ mm3) in water sorption test, but 3 groups (C, E and F) showed high solubility which exceeds theISO requirement (< 7.5 μg/mm3). For color stability, the color difference were detected at 5 groups (A, E, F, G and H).
Group-D and F showed the low flexural strength and some building direction did not satisfied the ISO requirement (> 60MPa). Resin components may affect the flexural strength, then user should check the components of 3D printing resin. Deficientdegree of polymerization may lead to large water sorption, water solubility and color changes. Further study should be donecomparison between specimens printed with specific 3D printer recommended by manufacturer and specimens used in thisstudy.
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KEYWORD
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3D printing temporary crown and bridge resin, ISO 10477, Components of resin matrix, Flexural strength, Physical properties
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