162 



ANIMAL DENTISTRY. 



Indications: — Trephining the skull to repulse teeth is in- 

 dicated when the tooth crown is too short to grasp with the 

 forcep, and when there is a complication of fistula or catarrh 

 of the sinuses. In secondary catarrh of the sinuses with 

 more or less accumulation of purulent matter, trephining is 



Fig. 114. 



Mallet. 



an essential adjunct to tooth extraction, even though the 

 extraction is accomplished with the forceps. Trephining is 

 performed to evacuate the accumulated secretion and to 

 admit the free irrigation of the catarrhal mucous membrane, 



^ 



SHARP A SMITH, CHICAGO. 



Fig. 114a. 

 Straight Punch. 



as well as for the purpose of admitting the punch to repulse 

 the tooth. 



The following are the molars that are removed by repul- 

 sion : Fourth and fifth superior, sixth superior of old horses. 



ISMANN & DUNN CO. 



"'""-"-'■"-"'' 



*'-"""""'"■"■' 



Fig. 114b. 

 Curved Punches. 



first, second, third and fourth inferior and the fifth and sixth 

 inferior when accompanied with considerable tumefaction of 

 the jaw. 



Restraint: — The recumbent position, lateral posture, af- 



