Disclaimer for printing aligners

Direct 3D printing of orthodontic aligners requires tight control of the full workflow. Aligner performance is not determined by the resin alone, but by the interaction between design specifications, printer characteristics, printing parameters and post-processing conditions.

Why results can vary

Small changes in any of the variables below can significantly affect the final aligner outcome:

Digital workflow: software settings, compensation factors, design strategy, and aligner thickness distribution.
Material configuration: resin system/version, handling, mixing and conditioning.
Printer specifications: wavelength, light power, optics, uniformity, and temperature behavior.
Printing settings: exposure time, layer thickness, lift speeds, support strategy, and orientation.
Cleaning: cleaning fluid type, cleaning time, temperature, agitation method, and contamination control.
Post-curing: wavelength, light power, curing time, curing temperature, and part positioning.
Post-processing: drying, finishing steps, storage and handling conditions.

What these variables affect

Because the workflow is multivariable, the following properties are also workflow-dependent and must be validated by the user:

Mechanical behavior: hardness, rigidity/flexibility balance, stress relaxation resistance during use, durability and overall resistance.
Optical outcome: clarity, haze, color and color stability.
Safety & biocompatibility: degree of cure, surface chemistry, extractables/leachables and overall suitability for the intended use.

User responsibility

Different printers and process conditions can lead to different outcomes even when using the same resin. For this reason, users must qualify and validate the complete workflow (printing + cleaning + post-curing + post-processing) before clinical or functional use.

Related guidance

Need help?

If you need printer-specific guidance or workflow support, contact us by email: info@3dresyns.com.