THE MICROBE OF DECAYING TEETH 253 



done so well as to preserve the teeth! for many, 

 many years even to old age. 



First. Keep the teeth clean. Brush them im- 

 mediately after every meal. Brush lightly, so as 

 not to wear the enamel. 



Second. Don't bite hard substances. Don't use 

 the teeth for a chisel or cleaver! 



Third. The moment a fracture or cavity is dis- 

 covered, go to a dentist and have it remedied. 



Fourth. Go to an up-to-date dentist once a year, 

 and have the teeth examined and cared for. 



