CARIES. 95 



The root of the tooth may be inflamed, and the jaw swol- 

 len and tender. Abscess may form, and extensive osseous 

 disease, such as we have represented by Fig. 46. 



It is true that this may be produced by inflammation at- 

 tacking the tooth socket, independently of a projecting 

 molar, to set up irritation, and I have operated in several 

 cases, believed by practitioners to have been instances of 

 nasal polypus, or of glanders, and which have yielded to 

 the removal of diseased bone.* 



* As interesting examples of mistaken diagnosis, I may quote two 

 related by Mr J. Purves, ILE.I.C. Service, and which are recorded in 

 the Veterinary Record, vol. ii., pp. 146, 147 : 



" CARIES OF TEETH GIVING RISE TO SYMPTOMS SIMULATING GLANDERS. 



" Aug. 24th, 1836. For some time the animal has been affected 

 with a muco-purulent discharge from the near nostril, and the lympha- 

 tic glares oa the same side are enlarged. Place on a course of altera- 

 tives. 



11 Sept. 5th. No alteration perceptible. Give cup. sulph. 333 daily, 

 and allow liberal diet. 



' Oct. 5th. The discharge from the nostril has ceased, but the glands 

 re?nain swollen. Give the sulphate of copper as before ordered. 



"2Brd. The discharge has again returned, and the glands remain 

 UTidiminished. Pass a seton over the latter, and increase the dose of 

 sulphate of copper to a drachm and a half daily. 



" Nov. 13^. The discharge has increased, and otherwise the symp- 

 toms continue highly unfavourable. Treatment as before ordered. 



" 19^A. The discharge has become copious of late, and it is now 

 mixed with blood. Substitute sulphate of iron for that of copper. 



" Dec. \Qth. The discharge continues copious, and has been so ever 

 since the last report. This day I discovered a carious tooth, the fifth 

 molar. I think this very likely to be the cause of the discharge from 

 the nostril and enlargement of the glands. 



" 19^. Attempted to extract the tooth with an instrument made 

 after the form of that used for the human subject, but could not fix it 



