THE CONNECTIVE TISSUES. 



[CH. V. 



The Teeth. 



During the course of his life, man, in common with most other 

 mammals, is provided with two sets of teeth ; the first set, called 

 the temporary or milk-teeth, makes its appearance in infancy, 



and is in the course of 

 a few years shed and 

 replaced by the second 

 or permanent set. 



The temporary or 

 milk-teeth have only 

 a very limited term of 

 existence. 



They are ten in num- 

 ber in each jaw, namely, 

 on either side from the 

 middle line two incisors, 

 one canine, and two de- 

 ciduous molars, and are 

 replaced by ten perma- 

 nent teeth. The num- 



Fig. 92. Normal -well-formed jaws, from which the ^er f permanent teeth 



alveolar plate has been in great part removed, so in each iaw is, however 

 as to expose the developing permanent teeth in 



their crypts in the jaws. (Tomes.) increased to Sixteen by 



the development of three 



molars on each side of the jaw, which are called the permanent 

 or true molars. 



The following formula shows, at a glance, the comparative 

 arrangement and number of the temporary and permanent teeth : 



Temporary Teeth. 



MIDDLE LINE OF JAW. 



Permanent Teeth. 



MIDDLE LINE OF JAW. 



