Should I be concerned about my baby's teeth?

My daughter is 11 months. She had got her 2 bottom teeth about 3 months ago and her 2 top teeth about a month ago. I've noticed that her bottom teeth overlaps her her top teeth or as its called an under bite. should i be concerned that she may have a permanent under bite? or will she grow out of this in time? If this helps, no one in my family has an under bite and no one on her fathers side has an under bite either.