For example, Baihumon, I combined all the teeth, since the were so close up and you don't even need to think about that.But for Dorumon, I left the teeth as they are, and adjusted the edge degree to match the ° of the mouth. So they are all sepparate, but since they are simple pyramid forms, it's not that hard to do them and just post the flaps on the built mouth. You simple build the pyramid theeth and glue them on and you achieve the look he hasAnd if I had combined them or just plastered them on the mouth, it would be way more complicated to build as it is now, since I would have to make more diagonals etc... And franky, any other option and it would look like crap.You just have to think what looks best at the end. Some things need more time than others when building them in the end, but they are worth it to achieve the ultimate papercraft look + a look that is just like the character you want to make