ANIMAL DENTISTRY. 



71 



that do not contact opposing teeth (e. g., brachygnathism) 

 are sensitive to the very tips. 



During youth and through the prime of life the active 

 tooth wears at the rate of about two milHmeters each year. 

 In the asred animal the loss is slower. In the case of the 



^30yrs. 



Fig. 47. 



An Illustration of the Change in Sliape of the Incisor Tahles as a Result of 



Wear, from 6 Years to 30 Years. 



visible teeth (the incisors) the wear brings to the surface 

 of the table a constantly changing picture, by exposing to 

 view the different consecutive parts of the tooth, from the 

 flattened table of youth to the triangular table of old age. 

 The most striking change in the teeth from wear occurs 



