'86 



MOUTH AT 6 YEARS. 



Fig. 244. — -Tables of incisor teeth (nat. size). 



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

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

 plete 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, wor 1 level ; the dental cavity having 

 disappeared out of them, and, in some cases, out of the lower 

 lateral incisors. The central incisors, viewed from the front, are 

 slightly whiter than at five years old, on account of their be- 

 ginning to lose their coating of cement. 



