How to Carve Perfect Margins on 3D Scanned Teeth in SelfCAD

 |  Moses Zikei

Carving Perfect Margins on 3D Scanned Teeth: How to do it

SelfCAD primarily focuses on 3D modeling, but one can still use this 3D design software to work on 3D scans. You would typically use a separate 3D scanning device or software to capture real-world objects, and then import those scans into SelfCAD for further editing, integration, or manipulation. This allows you to combine scanned elements with custom-designed models or modify scanned objects as needed within SelfCAD workspace.

In this section, you will learn an amazing technique for perfect margin carving using SelfCAD advanced 3D scanner editing tools. To start, launch SelfCAD and open the workspace:

SelfCAD workspace

From the top toolbar, on the File menu, select Import object:

File option in SelfCAD

Click Load Object from Tutorial:

Loading Object from Tutorial

On the right panel, activate the Polygon Selection tool. Then click on the gear icon to open the advanced settings of the Polygon Selection, which appears on the left panel. Set the Tolerance to 5, and set the Deep Selection to true:

Polygon Selection in SelfCAD

Select the highlighted region as shown below, and then set the Tolerance to 0:

Tolerance in SelfCAD

De-select the back side of the selected region. Select only the front part as shown below, and then click on the Copy button to make a copy:

Creating a copy of the design

On the right panel, click to activate the Edge Selection. On the left panel, click on the Select Loose:

Edge Selection in SelfCAD

Click on the “X” to close the selection settings panel. Then, click on the Copy button to make a copy of the selected object as shown below:

Creating copies of design

Click on the highlighted region, and select it. You can also use the marquee selection to select the region. Then click on the Edit menu found on the top toolbar, and click on the Delete button to delete the highlighted region:

Edit menu in SelfCAD

Deactivate the object selection tools. On the toolbar, on the Drawing category, select the 3D Sketch:

Drawing in SelfCAD

From the tool panel, select Circle:

Circle selection

De-select the profile 1. 

Click on the highlighted point below, to draw the circle.

Selecting profiles

Then type in 2 as the radius. Click again on the highlighted point to de-select the point. There you go, the circle is ready:

Selecting highlighted sections

Select the Profile_1 on the right panel. Then on the Tools category on the toolbar, select the Follow Path tool:

Follow path tool in SelfCAD

On the left panel, set the mode to Extrude:

Extrude option in SelfCAD

Tick the check mark to finalize the Follow path. On the right panel, select the difference_1. Then on the toolbar, from the Stitch and Scoop category, select Difference:

Stitch and scoop tool of SelfCAD

Select the Mesh_1 to subtract it. 

Mesh tool of SelfCAD

Tick the check mark to finalize the operation.

Finalizing operation in SelfCAD

On the right panel, click to activate the Inverse Selection:

Inverse selection of SelfCAD

On the top toolbar, from the Edit menu, click on the delete button:

Edit menu of SelfCAD

Click yes to delete the selected objects:

Deleting the options in SelfCAD

There you go, you have carved a perfect margin on a 3D Scanner teeth:

Carved a perfect margin in teeth

Perfect margins on 3D scanner teeth are essential for precise dental work, ensuring optimal fits. The various SelfCAD’s versatile tools are very good at carving the margins, ensuring they are error-free and dependable. This is beneficial in a number of ways, including sculpting and refining the intricate details of dental scans for easy integration with prosthetics or restorations. After that, you can also use the in-built online slicer of SelfCAD to slice your designs and generate the Gcode to send to your 3D printer. The video below shows how the slicer of SelfCAD works.


Enjoy powerful modeling, rendering, and 3D printing tools without the steep learning curve.

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