Stress Relaxation Properties of Five Orthodontic Aligner Materials: A 14-Day In-Vitro Study.

ABSTRACT: We aimed to investigate the stress relaxation properties of five different thermoplastic aligner materials subjected to 14 days of constant deflection. Five different thermoplastic aligner materials were selected, whose elastic properties varied: F22 Evoflex, F22 Aligner, Durasoft, Erkoloc-Pro and Duran. The static properties of these materials-in particular, stiffness, stress-strain curve and yield stress-were measured with a three-point bending test. For all the tests that were performed, a minimum of three samples per material were tested. The yield load, yield strength, deformation and particularly the stiffness of each material were found to be similar in the single-layer samples, while the double-layer samples showed far lower stiffness values and were similar one to another. F22 Evo

SUBMITTER: Albertini P 

PROVIDER: S-EPMC9405504 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature