CARIES OP THE TJEETII. 



22T 



CARIES OP THE TEETH. 

 The teeth of horses, as has already been stated, arc made up 

 of three substances, the enamel, the bone, and the crnsta petrosa ; 

 ^fe^^B ^"^ ^" consequence of their peculiar arrangement 



^^|and the inability 

 TiiOf the animal to 

 inform us of his 

 sufferings, this dis- 

 ease frequently be- 

 comes much more 

 serious than in 

 man. Its opera- 

 tion, besi dcs, is 

 quite different 



THE BLOODED MARE FASHION AND FOAL. 



upon the teeth of horses from what it is upon the human teeth. 

 Ill the human subject caries is found, in a large majority of 

 cases, making its appearance as a dark spot between the teeth, 

 on one side of the crown, gradually working inwards, destroy- 

 ing the bone in its progress, and leaving the enamel a mere 

 shell upon the outside of the tooth, while the roots generally 

 remain in a comparatively sound condition during the progress 

 of decay. In the horse, however, caries is a very different thing, 

 as far as its effects are concerned. It makes its appearance 

 upon some one or more of the indentations or depressions upon 

 the face of the tooth, attacking the crusta petrosa, (a substance 

 not found in the human tooth,) and extending from the face 

 through the entire length of the tooth, splitting it up into 

 several thin plates, in consequence of which abscesses often form 

 at the roots of such teeth, which, being prevented from dis 



