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KMID : 0362120210430030071
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Journal of Technologic Dentistry
2021 Volume.43 No. 3 p.71 ~ p.76
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Observation of thermal properties of dental 3D printer materials
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Song Joon-Boo
Park Yu-Jin
Choi Sung-Min
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Abstract
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Purpose: In this study, thermal properties were observed by measuring the extent of ther-mal expansion and the amount of thermal residue that appears upon burnout on a work-piece made by using a dental digital light processing (DLP) three-dimensional (3D) printer.
Methods: Thermal properties of workpieces manufactured by using two 3D printers were observed. The specimens were designed in cylindrical form with dimensions 10 mm in di-ameter and 10 mm in height. The control specimen was made of wax, and the experimental specimen was made of resin. The thermal expansion rate was measured by applying heat to three types of specimens, and burnout residue was measured.
Results: The thermal expansion rate of the wax pattern (WP) specimen was 0.93%±0.05%, of the RP1 specimen was 1.30%±0.08%, and of the RP2 specimen was 1.20%±0.09%. Measuring the recovered residue yielded residual amounts of 0.2% for the WP specimen, 1.1% for the RP2 specimen, and 1.8% for the RP1 specimen.
Conclusion: 1. From measurements of the workpieces manufactured by dental DLP 3D printing, the thermal expansion rate was found to be higher than that of wax. 2. As a result of measuring burnout residues on the workpieces manufactured by dental DLP 3D printing, the required summoning temperature to obtain suitable castings was de-termined to >750℃.
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KEYWORD
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Digital light processing, Resin, Thermal expansion, Thermal property, Three-di-mensional printer
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