| If you see… | Do this… | |-------------|-----------| | solid or facet in text editor | Rename .sdfa → .stl | | Gibberish + “SolidWorks” in header | Use FreeCAD or SolidWorks to convert | | Nothing but random symbols (binary) | Try online 3D viewer or convert via Blender | | Very small file (<10 KB) | File is likely corrupt – find original source |
The primary reason to convert an is to bridge the gap between simulation/design and physical creation:
If you have the custom attachment ( .sdfa ) loaded into Exocad, you can export it. Open your design in Exocad.
When software restrictions fully prevent a file export, dental lab veterans employ a visual digitization technique to rebuild the asset into an open mesh format.
Open the STL file in a free viewer (such as Microsoft's 3D Viewer or MeshLab) to ensure the geometry exported correctly. Sdfa File To Stl
In the cluttered workshop of Elara, a retired aerospace engineer, sat a dusty terminal running a relic OS. Her grandson, Leo, burst in holding a broken toy rocket. "Grandma, the 3D printer says it needs an STL file, but all I have is this…" He held up a worn floppy disk labeled SDFA_ARCHIVE.DAT .
Open your new STL file in a free tool like MeshLab or Windows 3D Builder . Use the "Repair" or "Close Holes" functions to make the model watertight before sending it to your 3D slicer. 2. Incorrect Scale or Units
Only use online converters for test files or non-sensitive, small geometry.
Select the specific geometry using CTRL+L and delete any unwanted parts ( X or Delete key). Export: Go to File > Export > STL (.stl) . Method 3: 3Shape Control Panel | If you see… | Do this… |
For tooth libraries, you can sometimes load a custom model, right-click the library tooth, and select "Save to file" to export it as an STL.
Newer versions may offer improved export functionality and support for additional export formats.
SDFA files are often protected intellectual property. Converting them may violate license agreements or manufacturer terms. Always review the licensing terms associated with your SDFA files before conversion.
Adjust export settings (set units to millimeters for 3D printing). Click . Method 2: Use an Intermediary CAD Viewer or Converter Open the STL file in a free viewer
Start by downloading FreeCAD and attempting the import process described in Part 4. Your finished STL is only four clicks away.
Method 1: The Native Exocad Export Workflow (Version 3.1 & Earlier)
Right-click the loaded tooth and look for the option to . Choose the export format as .stl to save the raw mesh. Method 3: The "Virtual Digitizing" Method (Any Version)
When using specialized CAD software like Exocad or 3Shape, always ensure the export settings are set to STL to make the model printable.
, though it depends heavily on the version of the software you are using . An .sdfa file is a proprietary encrypted 3D mesh format used primarily by exocad (a popular dental CAD software) for its attachment and tooth libraries.
