80 I 'E TEJt/XA RT DENTAL S UJ?( ,' ER ) '. 



may have decayed away, leaving the remainder of 

 the tooth thin and sharp, which in some instances 

 leads to laceration of the tongue, if the inside of the 

 tooth remains, and laceration of the cheeks if the 

 outside remains. In other cases the tooth may be 

 only slightly roughened where there will be a ten- 

 dency to the accumulation of tartar. There will be 

 more or less accumulation of food .in the cavity, 

 which when removed will give off a very offensive 

 and disagreeable odor, giving rise to the popular 

 term, "rotten teeth." 



EFFECTS OF CARIES. 



The effects of caries vary, but chief among 

 them, is death of the tooth and its subsequent re- 

 moval. If caries of the teeth exists in a young animal 

 exposure of the pulp first takes place and there occurs 

 that peculiar and well known sensation, so dreaded 

 by the human family, toothache. Inflammation and 

 suppuration follow, by which a discharge is estab- 

 lished from between the margin of the gum and 

 tooth, or a fistulous opening is formed. If the cari- 

 ous tooth is an upper one, and the third, fourth, fifth 

 or sixth, this fistula communicates with the sinus 

 opposite, but if the first and second, it communicates 

 directly with the nasal cavities, and if the tooth is 

 located in the lower jaw the fistula usually opens on 

 the lower margin of the inferior maxilla, opposite 

 the root of the affected tooth. 



