# How to make block recession bone model

**URL:** <https://discourse.slicer.org/t/how-to-make-block-recession-bone-model/36488>\
**Category:** Support\
**Created:** [May 30, 2024, 4:38am UTC](https://discourse.slicer.org/t/how-to-make-block-recession-bone-model/36488 "2024-05-30T04:38:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jj\_J](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jj_j/32/76675_2.png) [@jj\_J](https://discourse.slicer.org/u/jj_J)\
**Post date:** [May 30, 2024, 4:38am UTC](https://discourse.slicer.org/t/how-to-make-block-recession-bone-model/36488/1 "2024-05-30T04:38:14Z")

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Hello, I am a beginner with 3D Slicer. I want to create a model for FEM analysis where the patellar groove has been block recessed. This model should have a block-shaped cutout in the groove. I would like to adjust the depth of this block as I create the model. What method should I use to create a segment in the bone where only this part is removed in a block shape?