# DentalSegmentator inaccuracies separating cortical bone and teeth

**URL:** <https://discourse.slicer.org/t/dentalsegmentator-inaccuracies-separating-cortical-bone-and-teeth/36683>\
**Category:** Support\
**Tags:** segmentation, dental\
**Created:** [June 7, 2024, 6:32am UTC](https://discourse.slicer.org/t/dentalsegmentator-inaccuracies-separating-cortical-bone-and-teeth/36683 "2024-06-07T06:32:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![viet\_duc\_Vu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/viet_duc_vu/32/66488_2.png) [@viet\_duc\_Vu](https://discourse.slicer.org/u/viet_duc_Vu)\
**Post date:** [June 7, 2024, 6:32am UTC](https://discourse.slicer.org/t/dentalsegmentator-inaccuracies-separating-cortical-bone-and-teeth/36683/1 "2024-06-07T06:32:42Z")

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![Untitled](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/b/3bc77824b6ef28aa9c2b9c767c56563641af3274.png)  
Hi.  
I really appreciate what you have done so far. The software is amazing. I have compared to between conventional segmentation ( with commercial software) and your segmentation extension. this extension helps reduce significantly the time for segmentation compared to the conventional one. Especially, in case of CT data with artifacts.  
However. I still want to add some comments aiming for improving this extension. I have a concern that after trying several segmentation. Although the result is fine ( as you can see in the picture), the some part of 3D segments seem to lost quite much structure ( maybe as a default HU parameter)). You can see the red arrows pointing out losing bonny wall of maxilla and mandible.  
so in case, I want to improve the 3D segmentation structure, is there any way to do that ?  
Thank you

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**Author:** ![Gauthier](https://avatars.discourse-cdn.com/v4/letter/g/919ad9/32.png) [@Gauthier](https://discourse.slicer.org/u/Gauthier)\
**Post date:** [June 7, 2024, 8:01am UTC](https://discourse.slicer.org/t/dentalsegmentator-inaccuracies-separating-cortical-bone-and-teeth/36683/2 "2024-06-07T08:01:40Z")

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Hi,  
Thank you for your message. In the case of thin cortical bone (typically on the buccal/labial side of the teeth), it is often difficult (both manually and automatically!) to delineate the teeth from the bone.  
If there are some bony parts under-segmented when looking at the MPR slices, you can try to correct them manually using segment editor tools that are embedded on the left side of the extension.  
Best,  
Gauthier