Oops,, did not reply. What you are asking is for very advanced node work. So, yes. It requires nodes.  I would start with something simpler. What earlier posters are saying is that sub surface scattering is needed which poser does not do well.

I would start with the shape. Teeth will never seem right until they resemble teeth. Your picture as an example. The dentures are so much more 3D in depth and shape. You need reflection, shine, textures, displacement maps,,, on and on.

I did not find the shader by bagginsbill so I messed quickly for this. I just keep the mouth shut...lol

This just gives you an idea