570 



HOW TO TELL THE AGE. 



FIG. 335. The lower incisors are chiefly 



depended upon to indicate the age. 



From their position they have 



received particular names. 



The two middle are 



termed pincers, 



A.; those near them on either side, the 



middles, B B; those which complete the 



half circle, the corners, C C. 



FIG. 336. Front and back view of 

 an incisor. 



FIG. 337. A longitudinal 

 view of an incisor. 



FIG. 338. Lateral section of an in- 

 cisor; a, external enamel; 6, central en- 

 amel: , dental star formed by newly- 

 formed ivory which has filled the cavity 

 of the absorbed pulp ; d, primitive ivory. 



