Effects of post-curing time on the mechanical and color properties of three-dimensional printed crown and bridge materials

Dohyun Kim, Ji Suk Shim, Dasun Lee, Seung Ho Shin, Na Eun Nam, Kyu Hyung Park, June Sung Shim, Jong Eun Kim

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Three-dimensional (3D) printing is increasingly being utilized in the dental field. After fabricating a prosthesis using a 3D printed resin, a post-curing process is required to improve its mechanical properties, but there has been insufficient research on the optimal post-curing conditions. We used various 3D printed crown and bridge materials in this study, and evaluated the changes in their properties according to post-curing time by evaluating the flexural strength, Weibull modulus, Vickers hardness, color change, degree of conversion, and biocompatibility. The obtained results confirmed that the strength of the 3D printed resin increased when it was post-cured for 60–90 min. The Vickers hardness, the degree of conversion, and biocompatibility of the 3D printed resins increased significantly around the beginning of the post-curing time, and then increased more gradually as the post-curing time increased further. It was observed that the color tone also changed as the post-curing time increased, with some groups showing a ∆E00 value of ≥ 2.25, which can be recognized clinically. This study has confirmed that, after the printing process of a 3D printed resin was completed, a sufficient post-curing time of at least 60 min is required to improve the overall clinical performance of the produced material.

Original languageEnglish
Article number2762
Pages (from-to)1-20
Number of pages20
JournalPolymers
Volume12
Issue number11
DOIs
Publication statusPublished - 2020 Nov 2

Bibliographical note

Funding Information:
Funding: This study was supported by the Advanced Technology Center(ATC) Program funded by the Ministry of Trade, Industry and Energy(MOTIE, Korea) (10077361, Integrated System for Dental Diagnosis, Treatment Simulation & PSI(Patient Specific Instrument) Design).

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics

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