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. 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. Furthermore, its geometric stability at high temperatures and the shape memory properties provide advantages for the clinical application.
Learning Objectives:
After this lecture, attendees will be able to:
Understand the thermos-physical properties of 3D printed aligners.
Evaluate the difference between a direct 3D printed aligner and a conventional thermoplastic (PETG, TPU, etc).
Outline the benefits of directly printed aligners with viscoelasticity.
