Is a crossbite between an upper front incisor and a lower lateral baby incisor a concern at age 6? or is it normally suggested to wait until all the 8 permanent incisors are out (to see if that crossbite is still there)? asking because my daughter (age 6) has the permanent top front incisor partially inside the lower lateral baby incisor (with the top permanent tooth trying to push out the lower baby tooth)