Learning Forum

[farah shakhtour]

Hi everyone,

I'm working on an orthodontic finite element model consisting of a tooth, PDL, and aligner.

The green geometry is the aligner. The tooth is located inside the aligner, and it is surrounded by a PDL layer

The aligner was created in SpaceClaim using the following workflow:

1. Generated the aligner using Shell with an outside thickness of 0.5 mm.
2. Joined the resulting bodies so that the aligner became a single solid part.
3. Applied Shrinkwrap with AutoSkin to obtain a clean watertight geometry.

The issue is that the aligner extends apically beyond the desired bone level. I would like to cut the aligner so that its lower edge follows the anatomical bone level exactly (represented by the pink geometry in the attached image).

I have already tried:

• Split Body, but I could not get it to work correctly.
• Using a plane as the cutting tool, but this only produced a straight, sharp cut. Since the bone level is curved and irregular, the result is not anatomically realistic.

What I am looking for is a method that allows the aligner edge to follow the contour of the pink bone, rather than creating a flat planar cut. When I tried the intersect, the extra edges out of the bone remined and couldnt be deleted

[skulkarn]

Hello,

You can try to use No merge option while Combine tool and then apply the Share Topology.