Hello Ishan, Thanks for your comment. The problem is that I cannot use Harmonic Analysis because it's a nonlinear system. And for the faces, there are hundred of faces that are not possible to merge. My region of interest is connection between teeth and PDL's( thin layer around the teeth). I want to find force distribution over these parts when the vibrational force is applied by the tray( green color part).
I repeatedly get error for "highly distorted part x" although I checked everything and even defined some more boundary conditions to fix those parts. what would be the reason of that?
To be honest I don't know how to use virtual topology, can you please help me with that?