Cut off subsurf supporting geometry only using quads I want to put an edge loop on this subsurfed base mesh so it acts as supporting geometry for the teeth so they aren't so round:

However, as you can imagine, this would create some problems in the other parts of the mesh because they would look too &quot;sharp&quot;:

I've tried moving the unnecessary part of the edge loop to the center of the face, but this makes the subsurf in that area flatter, which I do not want. How do I get rid of the unnecessary parts of the edge loop? I want this mesh to be only quads, so a quad-only solution would be preferred.
Do all your quads have to be connected? It might be easier to split the mesh, so you have more control over specific parts.