VETERINART DENTAL SURGERT. 147 



again and needs to have the operation repeated. 

 Extracting on the whole is deemed preferable, 

 although it seems rather formidable. A long tooth 

 even if sound is not nearly as hard to extract as 

 those on either side of it which have remained in 

 constant wear. 



The reason of this is obvious, for if we examine 

 the roots we find they do not extend nearly as far 

 into the alveolar cavity as those on either side, 

 neither are the roots as long. They thus afford less 

 surface for attachment to the side of the alveolar 

 cavity. 



There is another important element that should 

 not be lost sight of even if the projecting tooth is 

 extracted. It very frequently happens that the tooth 

 of one jaw does not come wholly into opposition 

 with the corresponding tooth of the opposite jaw. 

 In such cases either the anterior or posterior edge of 

 one of the teeth in the jaw opposite from that 

 which had the tooth extracted, will still remain out 

 of wear and as a consequence will gradually project, 

 often producing a very sharp point which lacerates 

 the lips very severely. These points should be 

 removed and the mouth carefully examined there- 

 after at least once a year. 



Difficulty may also arise, and frequently does, 

 from the teeth on either side of the cavity, formed 

 by extracting the tooth, closing in and partially fill- 



