That's my sculpted head, the base mesh is very simple. I have done this with normal sculpting and multiresolution modifier.
Now when I enable Dynamic Topology it throws my sculpting in the trash and I get the base mesh.
Toggling the dynamic Topology off, I get such a sculpt:
How can I rescue my sculpting work and still use dynamic topology?
Should I retopology the mesh?
The mesh will be 3d printed, is it enough to apply the multiresolution modifier in the end, to get the sculpting into the print?