OF MOUNTING ARTIFICIAL TEETH. 137 



This is, of course, in reference to plates made with 

 springs and clasps ; for when atmospheric pressure 

 is employed, it is a rule to occupy as much of the 

 superior jaw as possible. 



These are points which should not be forgotten, 

 because in England the practice requires the use 

 of springs and clasps, and of course the great 

 facility of their application in this process is one 

 which should claim particular attention. When 

 two or more teeth are to be sustained by pivots 

 passing into the natural fangs, which for comfort 

 or choice requires a small plate, nothing can 

 exceed the facility, beauty, or strength of this 

 method ; because the impression can be made to 

 give you positive indication of the desired direc- 

 tion of the pivots which are cast with the plate, 

 and thus lessen the difficulties commonly expe- 

 rienced in positioning these pivots, as well as 

 obtaining the exact situation of the teeth. 



In this process breakages never occur from use, 

 but from accident only out of the mouth, and 

 much less frequently, from its superior strength, 

 than is generally experienced, and when broken is 

 rapidly and effectually repaired, without affecting 

 in the slightest degree its former usefalness or 

 appearance. 



Having secured a beautiful stock of block and 

 single teeth, known to some of you as those im- 

 properly used for hard rubber, as they were made 

 for this process and belong to this patent, a 



