Hi, i am researcher in Malmo University. I am planning to conduct a research on dental implants. I would be grateful if someone can help me with the problems that i have. Can 3D Slicer be used to to align (superimpose) two .stl files of the same patient ? I will be using the surface scanner (3s…

Have a look at this thread: [image] Align 2 segment 1 stl and 1 segment Support Is there a solution to align 2 objects (1 STL IMPORT and 1 segment )with a lot of acurate Maybe an extention. thanks a lot for your advice jean-marc[align]

Hi Steffen-o, Thank you for the direction. It solved my first problem. And i need to figure out how to do the measurement and the colour map. Thank you again.

Hello Manjula How do you do. I am a dental student at UQ working on a similar research project for my final year requirement - aligning 2 STL tooth models for endodontic research purposes. I was wondering if you were able to find any methods to do the measurement and the colour map. Any advice & d…

[image] seanchoi0519: How do you do. I am a dental student at UQ working on a similar research project for my final year requirement - aligning 2 STL tooth models for endodontic research purposes. I was wondering if you were able to find any methods to do the measurement and the colour map. H…

[image] manjula: I have tried virtually all methods available in 3D Slicer for surface registration and found the IGT fiducial registration method, a semi automatic method to be the most useful one. Have you tried ALPACA, which is part of SlicerMorph? SlicerMorph/Docs/ALPACA at master · Slice…

Manjula, thank you for the pieces of gem you’ve outlined here. I will have a thorough look at the two softwares you’ve recommended. Regarding your question of what measurement I need - essentially, I will need to calculate the difference between the 2 STL mesh files in terms of mm (length) once th…

Hi, thanks for this. I will have a go at it later today.

Hello muratmaga, I’ve had a look at ALPACA and it seems like it requires a .ply file format & .fcsv landmark file. If possible, I’m looking to work with .stl files. Would there be a way to work around this? How could I obtain the landmark for a .stl file? Would you mind elaborating on creating a …

If you loaded your stl models into slicer, you can save them as ply. We don’t like stl, due to potential issues with physical scale. As for the fiducial, you only need to create a single point and save it as fcsv. @agporto @smrolfe should we consider making the interactive mode work with data load…

[image] muratmaga: We don’t like stl, due to potential issues with physical scale. I’m not aware of any standard way of specifying coordinate system unit in either STL or PLY. You can include comments in both formats to specify any additional information (we use this for specifying the coordi…

TWO .stl file alignment and measurement

Support

steffen-o (Steffen O) September 4, 2019, 2:01pm 2

Have a look at this thread:

Topic		Replies	Views
STL models - Alignment and Volume measurement Support	16	3640	August 26, 2023
How to superimpose 2 stl files. Need help Support registration	5	97	January 20, 2026
ALPACA module alignment help - shapes too different? Support registration	23	1461	January 20, 2021
Mandible registration SlicerCMF	23	2384	January 31, 2020
Revisiting Rigid Mesh Registration Support	20	3063	March 11, 2025

TWO .stl file alignment and measurement

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