Tim is 7 years old.  Two of baby lateral incisors are still quite stable (Fig.1: B), while the adult lateral incisors (2) that are supposed to replace them come out behind.  There are at present not enough spaces for adult lateral incisors to move into positions that are occupied by the baby lateral incisors.  Fig.1: #1 stands for adult central incisor. Return to original text

Xin Wei, DDS, PhD, MS 1st edition 11/02/2011, last revision 11/02/2011