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KMID : 0362120220440030076
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Journal of Technologic Dentistry
2022 Volume.44 No. 3 p.76 ~ p.80
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Comparison of polymerization by time of light curing for dental 3D printing
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Kim Dong-Yeon
Lee Gwang-Young
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Abstract
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Purpose: The purpose of this study is to analyze the depth according to curing using photo-curable resin for dental three-dimensional printing.
Methods: A stainless mold with a height of 4 mm was prepared. Ultraviolet (UV) polymeriza-tion resin was injected into the mold. Photocuring was then performed for 5 minutes using a photopolymerizer, and the height was measured using a digital measuring instrument (first group). Second, light polymerization was also performed outside the mold for 5 min-utes, and the height was measured using a digital measuring instrument. Third, light polym-erization was further performed for 5 minutes, and the height was measured using a digital measuring instrument. Statistical analysis was performed with the Kruskal-Wallis test, which is a nonparametric test (α=0.05).
Results: The third group had the largest measurement length, whereas the first group had the smallest. However, the difference between groups was not statistically significant (p>0.05). The color of the first group was different from that of the second and third groups.
Conclusion: All of the 4-mm-thick photocured specimens had a curing reaction, but the part that was not directly irradiated with UV did not show its original color.
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KEYWORD
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Computer-aided design, Computer-aided manufacturing, Photopolymer, Thick-ness, Three-dimensional printing, Ultraviolet
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