# Reconstructing a skull fragment with SSM/PDM

**URL:** <https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365>\
**Category:** Support\
**Created:** [December 4, 2025, 4:01pm UTC](https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365 "2025-12-04T16:01:00Z")\
**Posts on this page:** 1\
**Showing post:** 29

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [December 9, 2025, 5:52pm UTC](https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365/29 "2025-12-09T17:52:12Z")

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Also, for posterity. There is now deformable model registration in `FastModelAlign` module of SlicerMorph extension. See here:

> [@Deformable model registration prototype](https://discourse.slicer.org/t/deformable-model-registration-prototype/45426):
>
> I have enabled deformable model registration as fourth level of registration (scaling, rigid, affine) in FastModelAlign module of SlicerMorph extension. Like ALPACA, it uses the point cloud based registration via Coherent Point Drift (CPD) algorithm. Then pointwise deformations are interpolated for every vertex. In its default mode it works quite fast. You can also output an interpolated grid transform (up to 256x256x256 grid size, default is 128^3) so that you can apply the resultant transform…

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_[View the full topic](https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365)._