Please try the newer Segment Editor module. It has more advanced “per-structure” handling, as inherently it stores the segmentations as per-structure labelmaps (segments). You can find tutorials here.
Although I’m not sure I understand your question. An STL file can only contain one structure. How do you have multiple structures? Also if you use the segmentation module as you say, then how come you edit the labelmap and not the segmentation?
Thank you for your helping.
I got a problem as this link
As you said, the STL file contains one structure so I follow the suggestion and then I got the labelmap.
My aim is to segment the tooth from the STL. But I don’t sure for the process how can I do that.
An STL file contains one surface mesh, which represents one segmentation. You don’t need to (and cannot) segment it. If you want to segment the different parts of the tooth, then you need to have the CT, in DICOM, or one of the research formats such as nrrd. As opposed to the STL, those contain a 3D image with different intensities in the voxels. Those are the images we have to segment.