VE TERINAR T DENTAL S URGER T. 235 



will wrap another cloth about them to keep them 

 dry. 



Having our patient ready, we must first give the 

 teeth a thorough examination. This should not be 

 hurriedly done, for on it the subsequent work de- 

 pends. For this purpose we should have a large vari- 

 ety of fine pointed instruments, so curved and formed 

 as to be easily brought in contact with all parts of 

 the tooth, so as to detect any defect that may exist. 



FIG. 61. Mouth Speculum, Simons'. 



For this purpose we use the small exploring 

 instruments. 



To open the cavity we will use the bur drill and 

 large chisels (Fig 56 and 55), using the chisel to cut 

 down the sides of the cavity. This may be done by 

 hand or with the mallet. The drills are used in the 

 bottom of the cavity. The fine drill should always 

 follow the chisel to smooth and even up the surface 

 cut. 



In our subjects it is best to remove all decayed 

 portions. 



