I would think that the teeth that are in contact with the pacifier would have more pressure placed on them compared to the teeth beside them. Normally, your jaw would have equal pressure placed on all the teeth. My opinion is that there may be a slight possibility of some shift similar to someone who sucks their thumb or who chews on their pens and pencils.

I remember my ortho commenting that one of this older female clients had her teeth shift from holding sewing needles on her mouth quite a bit. Any unequal pressure has the potential to shift teeth. Ortho's move teeth all the time, using unequal pressure to accomplish the movement.

Braceface2015


There may be a story in there somewhere.

Now the question is the pacifier an ortho or old style ?
  If old style it could move teeth, Ortho style have lip plate that conforms to facial feature where teeth would be held in place.

HgWells

To answer Hgwells question its an old style pacifier  bought from Amazon it a proper adults one which means its just bigger version of what you normally see

I just checked and my new pacifier is an orthodontic one the pictures and description match perfectly. I must admit though my bite feels a little odd after ive had my paci in for a a few hours it feels like my teeth dont meet properly,at the back not sure what this means. I now keep it in all nite maybe I should cut down??