CHANCIE8 IN THE TEETH P^KOM AGE. 743 



row in front, and should, in this case, be removed by some suitable 

 instrument. 



A B C 



Fig. 195. —A milk central incisor. A, rear view. B, front view. 

 C, profile. [From Goiibatix and Barrier). 



3. The teeth show wear. The tables of the permanent incisors, 

 as they become rubbed down, change their form in the manner 



A B c 



Fig. 196. — A permanent lower central incisor. A, front view. B, rear 



view. C, profile. {From Goiihaitx and Barrier.) 



alluded to on p. 741, and as illustrated by Fig. 197 and by the 

 plates giving the different ages. As a rule, the tushes become 



