OPERATIONS ON THE TEETH. 



343 



Extraction of Teeth. 



The extraction or removal of teeth is indicated for the reduc- 

 tion of any excess in their number, which may interfere with mas- 

 tication ; or when these organs are abnormal in form or direction, 

 and obstruct the growth or usurp the jDlace of a permanent tooth ; 

 or when they are diseased with caries, or affected with any of the 

 pathological conditions which we have before considered ; or when 

 they become the cause of a dental fistula. 



To extract the incisors of any of our domestic animals, the 

 molars of dogs, or the caduc molars of large herbivorous animals, 

 some of the various forms of tooth forceps that are used in human 



Fig. 346.— Samples of Tooth Forceps. 



dentistry or the different shapes of the key of Garangeot or special 

 larger forceps, such as that of LeceUier (Fig. 348) or the enlarged 

 Garangeot's key, as modified by Delamarre (Fig. 349), w^iU be 

 necessary. The modus operaiuli is generally simj^le ; the tooth, 

 still firmly attached to its alveola, or perhaj)s loose and more or 



