PART III. 

 CLINICAL CASES. 



I.— HEAD AND SPINAL CORD. 



K.— CRANIUM, BRAIN, AND SPINAI CORD. 



SUPERNUMERARY TOOTH IN THE TEMPORAL REGION— OPERATION- 

 SUPPURATING MEDIAN OTITIS. 



I. Three-year-old gelding, left in hospital 23rd January, 1897. 



About two months previously a gradually increasing swelling had 

 appeared at the base of the left ear. On the 20th Januar}' a long 

 streak of pus was seen running over the face. A veterinary surgeon 

 who was consulted spoke of operation, and recommended the animal 

 being sent to Alfort. 



Condition on Entry . — A hard swelling, as large as a hen's egg, and 

 of bony consistence, was seen a little in front of the base of the left 

 ear. On the anterior surface of the scutiform cartilage was a sinuous 

 orifice, which discharged considerable quantities of greyish pus. 



Diagnosis. — Supernumerary tooth (dental ectopia). 



Treatment. — On the 25th January the animal was cast by means of 

 Daviau's table. After clipping away the hair and preparing the parts 

 the sinus was explored, and found to be about 4 inches in depth, and 

 to terminate over a dental prominence. The skin was incised for a 

 length of 3|- inches over the swelling, parallel with the long axis of the 

 head. The margins of the wound were drawn apart,* and the super- 

 numerary tooth exposed by a second slight incision. The tooth, which 

 was fixed in the temporal bone over the origin of the zygomatic pro- 

 cess, could not be removed with the strong dental forceps used. It was 

 therefore left in position. The wound was cleansed and a plug of 

 iodoform gauze applied, over which the lips of the wound were reunited 

 by a few sutures. The tampon was removed next day. 



During the next few days the cavity was washed out with an anti- 

 septic night and morning. At the owner's request a further operation 

 was undertaken on the 2nd February. 



The animal having been cast the tooth was again freely exposed, 



