2.1 Creating a printable file
The model is based on cone-beam computed tomography scans (CBCT) from the publicly available OpenEar library.7 First, the file was translated to the Object file (OBJ) format, refined, and translated to the Standard Triangle Language (STL)-format using the software Meshlab.8 In order to fixate the model during drilling, we added a block on the back of the model using SolidWorks (Dassault Systemes, Vélizy-Villacoublay, France: Figure 1). Print job generation was carried out in Ultimaker Cura (Ultimaker, Utrecht, Netherlands), orienting the model so that the important areas were orthogonal to the build plane, and facing upwards.