# Compounded Markup for osteotomy

**URL:** <https://discourse.slicer.org/t/compounded-markup-for-osteotomy/44607>\
**Category:** Support\
**Tags:** markups\
**Created:** [September 27, 2025, 1:06pm UTC](https://discourse.slicer.org/t/compounded-markup-for-osteotomy/44607 "2025-09-27T13:06:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Hans\_Peter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hans_peter/32/81161_2.png) [@Hans\_Peter](https://discourse.slicer.org/u/Hans_Peter)\
**Post date:** [September 27, 2025, 1:06pm UTC](https://discourse.slicer.org/t/compounded-markup-for-osteotomy/44607/1 "2025-09-27T13:06:00Z")

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I want to perform a repeatable osteotomy with a certain shape using Slicer. Essentially I need a modified plane Markup, where the section crossing the bone is not simply horizontal, but for ex. a Z-shape pattern. As I am not a programmer in any way, I sought to consult the community here first for help. Is there an extension that allows for the construction of more complex markups? Or is an all new, custom markup required for this? Thanks in advance

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [September 27, 2025, 1:27pm UTC](https://discourse.slicer.org/t/compounded-markup-for-osteotomy/44607/2 "2025-09-27T13:27:50Z")

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@mau_igna_06 might be able to give some advice here. Have a look at his [extension](https://github.com/SlicerIGT/SlicerBoneReconstructionPlanner).

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [September 27, 2025, 3:12pm UTC](https://discourse.slicer.org/t/compounded-markup-for-osteotomy/44607/3 "2025-09-27T15:12:29Z")

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> Z-shape pattern

You can achieve that using the `ModelClip` module of the `ModelClip` extension, see use case below:

[![](https://img.youtube.com/vi/4I-9qnmvCLY/maxresdefault.jpg "Digital Orthognathic Planning with Free & Open-Source 3D Slicer") ](https://www.youtube.com/watch?v=4I-9qnmvCLY&t=740)

I’m interested in developing such new markup, with n neighboring planes that share a side, but it is not on the top of my priority list currently

Thanks for the tag Steve 🙂