Effects of postcuring temperature on the mechanical properties and biocompatibility of three-dimensional printed dental resin material

Enkhjargal Bayarsaikhan, Jung Hwa Lim, Seung Ho Shin, Kyu Hyung Park, Young Bum Park, Jae Hoon Lee, Jong Eun Kim

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Three-dimensional (3D) printing is an attractive technology in dentistry. Acrylic-based 3D printed resin parts have to undergo postcuring processes to enhance their mechanical and biological properties, such as UV-light and thermal polymerization. However, no previous studies have revealed how the postcuring temperature influences the biocompatibility of the produced parts. Therefore, we postprocessed 3D printed denture teeth resin under different postcuring temperatures (40, 60 and 80C) for different periods (15, 30, 60, 90 and 120 min), and evaluated their flexural properties, Vickers hardness, cell cytotoxicity, cell viability, and protein adsorption. In addition, confocal laser scanning was used to assess the condition of human gingival fibroblasts. It was found that increasing the postcuring temperature significantly improved the flexural strength and cell viability. The flexural strength and cell viability were 147.48 ± 5.82 MPa (mean ± standard deviation) and 89.51 ± 7.09%, respectively, in the group cured at 80C for 120 min, which were higher than the values in the 40 and 60C groups. The cell cytotoxicity increased in the 40C groups and for longer cultivation time. Confocal laser scanning revealed identifiable differences in the morphology of fibroblasts. This study has confirmed that the postcuring temperature influences the final mechanical and biological properties of 3D printed resin.

Original languageEnglish
Article number1180
JournalPolymers
Volume13
Issue number8
DOIs
Publication statusPublished - 2021 Apr 2

Bibliographical note

Funding Information:
Funding: This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (NTIS Number: 9991006910).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics

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