crown of maxillary lateral inc isors 4) incisal ridge greater degree of inc lining di l inga l I
4）incisal ridge - greater degree of inclining distolingually crown of maxillary lateral incisors
(2) root of max i l lary lateral incisors single, thin, l ong Cr own-to-root ratio 1:1.4 2) The cervical cross section is al most egg shape
（2） root of maxillary lateral incisors 1）single，thin,long Crown-to-root ratio 1：1.4 2）The cervical cross section is almost eggshaped