VE TERINAR Y DEN TAL ^UR GER T. 89 



family, where the process of denudation is so slow 

 that it often takes from ten to twenty years to accom- 

 plish the same result. It usually makes its appear- 

 ance at the approximal corners on the labial surfaces 

 of the central incisors. From here it gradually 

 involves the whole labial surface of the tooth, after 

 a time implicating the lateral incisors, which also at 

 first become affected on their labial surfaces where 

 they approximate the central pair of teeth. Unless 



FIG. 23. 



DENUDING OF THE CENTRAL AND LATERAL INCISORS. 



the progress of the disease is checked or entirely 

 impeded in its progress, it will gradually extend until 

 it involves all the incisors of that jaw. As far as my 

 observation and knowledge of this disease extends, I 

 can not say that any other teeth than the upper inci- 

 sors ever become affected. I see no reason however, 

 why they should remain immured from an attack of 

 this disease, unless its cause can be attributed to the 

 acidity of the buccal secretions of the mouth. 



On June 23, 1889, Mr. Shattuck, of Covert, Michi- 



