Use of free CAD software for 3D printing individualized face masks based on face scans.

Aim: To describe a method of digitally customizing 3D-printed face mask designs using 3D face scans and free software.

Materials And Methods: The procedure of creating customized face masks initially involved importing and aligning STL files of face scans and mask components in free CAD software. The imported mask described in this article is composed of three different STL files (body, filter structure, and grid).