# 3D Assessment of Mandibular asymmetry

**URL:** <https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533>\
**Category:** SlicerCMF\
**Created:** [June 19, 2017, 10:04pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533 "2017-06-19T22:04:20Z")\
**Posts on this page:** 7\
**Page:** 2

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**Author:** ![Pilar](https://avatars.discourse-cdn.com/v4/letter/p/b9e5f3/32.png) [@Pilar](https://discourse.slicer.org/u/Pilar)\
**Post date:** [September 25, 2017, 4:31pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/22 "2017-09-25T16:31:52Z")

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Great!!

Thank you so much Dr Beatriz.  
Looking forward to hearing from you.

Pilar

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**Author:** ![Pilar](https://avatars.discourse-cdn.com/v4/letter/p/b9e5f3/32.png) [@Pilar](https://discourse.slicer.org/u/Pilar)\
**Post date:** [October 23, 2017, 4:07pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/23 "2017-10-23T16:07:19Z")

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Hi Dr Beatriz,  
could you figure it out how to do the statistics?

Looking forward to hearing from you.

Best

Pilar

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**Author:** ![bpaniagua](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/bpaniagua/32/20_2.png) [@bpaniagua](https://discourse.slicer.org/u/bpaniagua)\
**Post date:** [October 23, 2017, 5:28pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/24 "2017-10-23T17:28:00Z")

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Hi Pilar,

I am sorry you are still struggling with this.  
My suggestion was along the lines “if i were you, I would figure out…” so there is probably a misunderstanding… I did not say I would figure it out, but suggested you talk to a statistician about it.

Do you need some ideas for names?

Thank you,  
Bea

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**Author:** ![Pilar](https://avatars.discourse-cdn.com/v4/letter/p/b9e5f3/32.png) [@Pilar](https://discourse.slicer.org/u/Pilar)\
**Post date:** [October 23, 2017, 5:40pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/25 "2017-10-23T17:40:33Z")

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Hi Dr Beatriz,

Sorry for the misunderstanding.  
Yes, could you please tell some statistics who can help me? Thank you so  
much

Pilar

El El lun, oct. 23, 2017 a las 7:38 p. m., Beatriz Paniagua \<  
[slicer@discoursemail.com](mailto:slicer@discoursemail.com)\> escribió:

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**Author:** ![danila](https://avatars.discourse-cdn.com/v4/letter/d/0ea827/32.png) [@danila](https://discourse.slicer.org/u/danila)\
**Post date:** [June 2, 2020, 2:16pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/26 "2020-06-02T14:16:02Z")

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Hi Dr Beatriz,  
I have a similar problem, and I don’t know how to solve it. Could you help me?

My goal is to measure the linear and volumetric change of a jaw before and after an orthognathic surgery (therefore comparing the pre and post CBCT).

Following the tutorial I found on the DCBIA team website, I made the segmentation of the anterior skull base at t0 and t1 with the ITK-SNAP software.

 ![immagine 1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/a/3aad3db73a45cd7102c0a680cc2a28f92a356af2.png)

Then I do the landmarks approximation about the two scans with Slicer and subsequently the recording performed on voxel relating to the skull base (using: basaline scan - T1; basaline segmentation - segmentation of anterior skull base at T1; follow-up scan - T2landmarks; follow-up segmentation - segmentation of skull base at T2landmarks).

 ![immagine 2](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/6/e6e2dd86a1c38f3217b6d4398fd2f053a11ba19f.jpeg)

After the registration I have segmented the first mandible on the t1 scan and the second mandible on the t2 scan obtained from the voxel recording. Then I transformed the segmentations of the two mandible into 3D surface models. I uploaded the two models on Slicer and I apply the module “model to model distance”.

 ![immagine 4](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/e/5e208f1dc2dd32060dd82b6f403f47ca380431cc.png)

I use the module “Shape Analysis Viewer” to obtain a color map.

 ![immagine 5](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/9/0966700bebbc214e1a13d7d9bb49ec5dfefbb5de.png)

Now I would like to take a statistic analysis about this, but I don’t know how I can do. Can you help me?

The flow that I have use is correct?

Thanks again for the support.

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**Author:** ![lili-yu22](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lili-yu22](https://discourse.slicer.org/u/lili-yu22)\
**Post date:** [February 27, 2022, 11:58pm UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/27 "2022-02-27T23:58:13Z")

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if l split the mandible unevenly， after spharm pdm，how can l know the difference is because the uneven split or the growth，thank you

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**Author:** ![lili-yu22](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lili-yu22](https://discourse.slicer.org/u/lili-yu22)\
**Post date:** [December 12, 2023, 7:39am UTC](https://discourse.slicer.org/t/3d-assessment-of-mandibular-asymmetry/533/28 "2023-12-12T07:39:11Z")

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can anyone help me to solve this question

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