# Cancellous bone fill for 3D printing?

**URL:** <https://discourse.slicer.org/t/cancellous-bone-fill-for-3d-printing/8952>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [October 30, 2019, 2:45am UTC](https://discourse.slicer.org/t/cancellous-bone-fill-for-3d-printing/8952 "2019-10-30T02:45:42Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [October 30, 2019, 3:46am UTC](https://discourse.slicer.org/t/cancellous-bone-fill-for-3d-printing/8952/2 "2019-10-30T03:46:17Z")

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This is a very common need and there are a couple of approaches that are less time-consuming than manual segmentation on individual slices. You can get some tips here and from similar topics on this forum: [After threshold-based bone segmentation in CT structure filled with holes](https://discourse.slicer.org/t/after-threshold-based-bone-segmentation-in-ct-structure-filled-with-holes/7983/6)

What exactly is “BoneExtension add-on” that you mentioned?

Probably the most automated bone hole filling method that is available for Slicer right now is in SurfaceWrapSolidify extension (Segment Editor - Wrap Solidify effect; Filter method: Deep hull; Output type: Segmentation). Have you tried it?

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