Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners

Se Yeon Lee, Hoon Kim, Hyun Joong Kim, Chooryung J. Chung, Yoon Jeong Choi, Su Jung Kim, Jung Yul Cha

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

To overcome the limitations of the conventional vacuum thermoforming manufacturing method, direct 3D printing of clear aligners has been developed. The present study investigated the thermo-mechanical and viscoelastic properties of a photocurable resin TC-85, which is a new material for the direct 3D printed clear aligners, comparing to a conventional thermoplastic material polyethylene terephthalate glycol. Dynamic mechanical analysis was performed to analyse the mechanical behaviours of the two materials at 37 °C and 80 °C, respectively. Furthermore, the shape memory property of the two materials was evaluated using a U-shape bending test, and the shape recovery ratio for 60 min at 37 °C was calculated. The results indicate that TC-85 can constantly apply a light force to the teeth when used for the 3D printed clear aligners, owing to its flexibility and viscoelastic properties. In addition, it is expected that the force decay induced by repeated insertion of the clear aligners will be reduced and a constant orthodontic force will be maintained. Furthermore, its geometric stability at high temperatures and the shape memory properties provide advantages for the clinical application.

Original languageEnglish
Article number6246
JournalScientific reports
Volume12
Issue number1
DOIs
Publication statusPublished - 2022 Dec

Bibliographical note

Funding Information:
This paper was supported by the Advanced Technology Center Program funded by the MOTIE, Korea. (10077316, Integrated System for Dental Diagnosis, Treatment Simulation and PSI Design).

Funding Information:
This paper was supported by the Advanced Technology Center Program funded by the MOTIE, Korea. (10077316, Integrated System for Dental Diagnosis, Treatment Simulation and PSI Design).

Publisher Copyright:
© 2022, The Author(s).

All Science Journal Classification (ASJC) codes

  • General

Fingerprint

Dive into the research topics of 'Thermo-mechanical properties of 3D printed photocurable shape memory resin for clear aligners'. Together they form a unique fingerprint.

Cite this