144 VETERINART DENTAL S URGENT. 



time. So long as it exists however, it continues to 

 form dentine, thus drawing out the fang to a taper- 

 ing point. When this occurs all nutrition, in my 

 opinion, is cut off from the tooth, so that it can not 

 be regarded otherwise than a foreign body, firmly 

 clasped by the gum and alveolus, and continually 

 pushed upwards by the contraction of the plates of 

 bone which become thinner as age advances. I 

 would say that at from seven to nine years a tooth 

 has attained its fullest growth." 



E. A. A. Grange, V. S., Professor of Veterinary 

 Science at the Michigan Agricultural and Mechanical 

 College, says: " I believe the development of the 

 teeth varies with the individual, and am inclined to 

 think they stop growing at the fourth or fifth year. 

 (* The horse ivoztld then be seven to nine years old) ; 

 though I would not be surprised if it was subject to 

 considerable variation, but I do not think that they 

 continue to grow throughout life, say beyond the 

 twelfth year." 



A. Liautard, M. D., V. S., Professor of Anatomy 

 at the American Veterinary College, says: "Per- 

 manent teeth are in the state of development, until 

 they make their appearance through the gums which 

 close their alveolar cavity; but though developed 

 they then begin their growth outside the cavity and 

 owing to their situation begin to grow out at two 



Italics mine. 



