46 



Dentition as indicative of the Age 



From the time of the perfect eruption of the temporary teeth, 

 at the age of one month, to the cutting of the first pair of 

 broad teeth, central permanent incisors, at the age of one year 

 to fifteen months, the only changes which will guide the expert 

 to a correct opinion of the age are those which affect the molar 

 teeth. 



Fiff. 42. — Molars of Lamb at three months. 

 . P.M., permanent molar, t.m., temporary molars. 



At three months the first permanent molar, the fourth in 

 situation, is cut, and is recognised by its recent appearance in 

 comparison with the tooth immediately in front of it, the third 

 temporary molar, which shows signs of wear. 



Fig. 43. — Molars of Hheej^ at nine months. 



-■ :1 In the above illustration (Fig. 42) the appearance of the 

 molars at the age of three months is shown. 



During a period of five or six months from the cutting of the 

 fourth molar there is nothing to guide the examiner except the 

 growth of the teeth and of the jaw, which results in leaving a 

 space behind the fourth molar. At the age oi nine ononths this 

 space is occupied by the fifth molar, as shown in the drawing 

 above (Fig. 13). 



