{"id":463309,"date":"2026-09-07T14:06:58","date_gmt":"2026-09-07T14:06:58","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boolean-method\/"},"modified":"2026-09-07T14:06:58","modified_gmt":"2026-09-07T14:06:58","slug":"boolean-method","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boolean-method\/","title":{"rendered":"Boolean method"},"content":{"rendered":"
\n

Hi everyone,<\/p>\n

I’m working on an orthodontic finite element model consisting of a tooth, PDL, and aligner<\/strong>.<\/p>\n

The green geometry is the aligner. The tooth is located inside the aligner, and it is surrounded by a PDL layer<\/div>\n

The aligner was created in SpaceClaim<\/strong> using the following workflow:<\/p>\n

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

    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<\/strong>).<\/p>\n

    I have already tried:<\/p>\n

      \n
    • Split Body<\/strong>, but I could not get it to work correctly.<\/li>\n
    • Using a plane<\/strong> 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.<\/li>\n<\/ul>\n

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

      \"\"\"\"<\/p>\n<\/div>\n","protected":false},"template":"","class_list":["post-463309","topic","type-topic","status-publish","hentry","topic-tag-design-optimization"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t