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KMID : 0362120200420040355
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Journal of Technologic Dentistry
2020 Volume.42 No. 4 p.355 ~ p.361
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Comparison between mechanical properties and biocompatibility of experimental 3D printing denture resins according to photoinitiators
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Park Da-Ryeong
Son Ju-Lee
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Abstract
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Purpose: In this study, we added two kinds of photoinitiators (CQ and TPO) to prepare twokinds of denture base resins (Bis-GMA series and UDMA series) for three-dimensional (3D)printing to compare and analyze their mechanical and biological properties and to find theoptimal composition.
Methods: Control specimens were made using the mold made of polyvinyl siloxane of thesame size. Light curing was performed twice for 20 seconds on both the upper and lower surfaceswith LED (light emitting diode) light-curing unit (n=10). Experimental 3D printing dentalresins were prepared, to which two photoinitiators were added. Digital light processing type3D printer (EMBER, Autodesk, CA, USA) was used for 3D printing. The specimen size was 64mm×10 mm×3.3 mm according to ISO 20795-1. The final specimens were tested for flexuralstrength and flexural modulus, and MTT test was performed. Furthermore, one-way analysisof variance was performed, and the post-test was analyzed by Duncan’s test at α=0.05.
Results: The flexural strength of both Bis-GMA+CQ (97.12±6.47 MPa) and UDMA+TPO (97.40±3.75 MPa) was significantly higher (p<0.05) in the experimental group. The flexural modulusin the experimental group of UDMA+TPO (2.56±0.06 GPa) was the highest (p<0.05). MTTtest revealed that all the experimental groups showed more than 70% cell activity.
Conclusion: The composition of UDMA+TPO showed excellent results in flexural strength,flexural modulus, and biocompatibility.
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KEYWORD
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Biocompatibility, Mechanical properties, Photoinitiator, Three-dimensional printer, Three-dimensional printing dental resin
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