796 



MOUTH AT 6 YP:ARS. 



Fig. 249. — Tables of incisor teeth (nat. size). 



The inner edge of the corner incisors is worn level with the 

 outer edge, and the central enamel of these teeth forms a complete 

 ring, except when it is fissured, as in the corner upper incisor of 

 the near side. The tables of the central incisors tend to assume 

 an oval form. The tables of the lower central incisors at this age 

 are, as a rule, worn level ; the dental cavity having disappeared 

 out of them, and, in some cases, out of the lower lateral incisors. 

 The cer-tral incisors, viewed from the front, are slightly whiter 

 than at fiv3 years old, on account of their beginning to lose their 

 coating of cement. 



