?38 ANIMAL 1)KXTISTR\. 



IS of nomin.'il dimensions its closure is effected by the fol- 

 lowing operative intervention : 



ist Step — Secure the subject in the lateral recumbent 

 position without anaesthesia. 



2nd Step — Shave the hair from the surgical area and dis- 

 infect with mercuric chloride solution 1-500. 



3rd Step — (hig. 153A.) Make a "melon-slice" resection of 

 the skin, extending above and below the orifice, so as to 

 include the orifice within its widest portion. 



4th Step — (Fig. 153B.) Make a longitudinal incision (Fig. 

 153B. 3. 3.) through the skin on each side of and about one 

 inch from the orifice, extending the entire length of the re- 

 sected skin. 



5th Step — Loosen from the bone all of the skin between 

 the longitudinal incisions. 



6th Step — (Fig. 153C. 5.) Suture the "melon-slice" 

 wound with interrupted stitches, bringing the raw edges into 

 'perfect apposition. 



7th Step — Protect the whole area with a clay dressing. 



After-care — Alaintain perfect protection during eight days 

 and then remove the sutures. Apply astringent lotions to 

 the gaping longitudinal wounds (Fig. 153C. 4. 4.) which will 

 heal by granulations. 



APPLICATION OF GUTTA PERCHA PLUGS. 



An artificial filling for the vacant alveolar cavity subse- 

 quent to the extraction of r.iolars is indicated when the 

 cavity refuses to close and thereby admits food into the 

 nasal cavities or sinuses, in chronic dento-nasal fistula and 

 in wadding a recently made tooth cavity that cannot receive 

 daily attention. 



The filling suitable for this purpose is a gutta percha 

 mixture known to the human dentist as "temporary stop- 



