234 



ANIMAL DENTISTRY. 



Restraint — Horses may be trephined in the standing po- 

 sition with the dental halter and twitch. When teeth are to 

 be repulsed or when any chiseling of the bone is necessary 

 the recumbent position is essential. 



y 



Fig. isia. 

 Plain Circular Trephine. 



ist Step — Clip, shave and disinfect the space intervening 

 between the maxillary spine and longitudinal suture of the 

 nasal bones. 



2nd Step — First open the maxillary sinus about one inch 



Fig. isib. 

 Assorted Trephines and Tooth Drills, with Brace. 



from its external border and one inch from the anterior ex- 

 tremity, but vary in the antro-posterior direction according 

 to tooth to be repulsed. 



3rd Step — Make a T-shaped incision through the skin 

 with the base of the T pointing to the median line of the 

 head. 



