192 



ANIMAL DENTIS'I'RY. 



only ol)jcction to this order of manipulations is the loss of 

 time consumed in changing instruments. When speed is a 

 consideration, all the work required of each instrument is 

 completed before the instrument is laid aside, as follows: 



1st. Float the posterior two-thirds of the superior ar- 

 cades, and all of both inferior arcades, with the straight 

 float. 



2nd. Float the anterior one-third of the superior ar- 

 cades, with the angular float. 



3rd. Blunt and bevel the ends of the arcades with the 

 twelve-inch file. 



Whatever is adopted, it will be found advantageous to 



Fig. 90. 



form the hal)it of following the routine in either plan, in 

 order to avoid omissions and unnecessary examinations of 

 the mouth to determine the amount of filing that has been 

 done. It is an error to use the floats promiscuously and to 

 repeatedly palpate to note the results. Such methods pro- 

 voke resistance, which is avoided in more systematic work. 



METHOD OF USING THE FLOATS AND FILES IN THE FORE- 

 GOING OPERATION. 



It is undeniable that one operator can float the teeth 

 of horses, and in fact, use any of the dental instruments 

 without provoking the least resistance, while another will 

 have more or less troulile with every animal approached. 

 So marked is the difference in this connection that bystand- 



