It depends on the format of the import feature. 3DS loves facet data because it is light weight. Creo, on the other had, can't do much with facet data (not by default). But there are a number of faced data outputs. Personally I prefer WRL files (VRML) because I know how to edit them and they have extensive knowledge on the web regarding this.
Therefore, if you have facet data as the master file imported into Creo, about all you can do is export it as one of the many facet data file formats.
When you do have a solid body model available, then you can output to just about anything.