Comparison of three dental resins for 3D printing of orthodontic appliances: Comparison of leaching, biocompatibility, and thermo-mechanical properties after post-curing and aging

This study highlights the importance of strictly standardizing post-polymerization protocols to ensure the safety and performance of 3D-printed dental devices and underlines the risk of the cumulative effect of leached compounds for the patient's health, even if measured cell viability and photo-initiator exposure dose were within acceptable limits. Moreover, whatever the resin, aging leads to a decrease in thermo-mechanical properties that may affect the device's performance.