BONE REMODELING IN DENTAL ERUPTION AND SHEDDING 



329 



Figs. 7 and 8. Incisor and premaxilla of a normal (Fig. 7) and an ia (Fig. 

 8) rat at 10 days of age. The ia rat incisor has not erupted. (Both figures X 21.) 



tion of the dental tissues and the formation of tumoilike masses. 



In summary, it may be stated that the cause of the development 



of the odontome-like formation in the ia rat is the resistance of the 



bone tissue to resorption in the early days of life. The proliferation 



