THE TEETH MARKS. 



421 



wearing down of these sharp edges, and the appearance of the 

 bony substance of the tooth beneath. The two corner teeth 

 will be scarcely up before the center teeth will be a little worn. 

 At two months, the edge of the four central teeth will be 

 evidently worn; yet as the wearing is not across the top of the 

 tooth, but a little out of the line of its inner surface, the edge 

 will remain nearly or quite as sharp as before. At three months 

 the six central teeth, and at four months the whole set will be 

 worn, and the central ones most of all; but after the second or 

 third month, the edge of the tooth will begin to wear dwn, and 

 there will be more of a Hat surface, with a broad line in the 

 center. 



"About this time a new change will begin, but very slowly, 

 to be seen. The central teeth will not only be worn down on 

 their edges, but the whole of the tooth will appear diminished, a 

 kind of absorption will have commenced. There will be a little, 

 but increasing space between them. The face of the tooth will 



likewise be altered, the 

 inner edge will be worn 

 down more than the outer, 

 and the mark will change 

 from the appearance of a 

 broad line to a triangular 

 shape. The commence- 



Eight months. Eleven months. ment of this alteration of 



form, and diminution of size, may be traced to about the fourth 

 month, and our cut gives a representation of the two central 

 incisors at eight months. The central teeth are now not above 

 half the size of the next pair, and they are evidently lessened. 

 "At eleven months, the process of dimunition will have 

 extended to the four central teeth, in the manner represented 

 in the cut. The vacuities between them, will now be evident 

 enough. 



