Match the following words and phrases with their meanings.

• Объекты 1
  • calcium
  • tooth decay
  • toothpaste
  • milk teeth
  • acid bacteria
  • enamel
  • permanent teeth
  • fluoride
• Объекты 2
  • they replace milk teeth
  • the process in which teeth become gradually damaged
  • the hard glossy substance that covers the crown of a tooth
  • a soft white element which is found in bones and teeth
  • the first teeth that grow in your mouth
  • a soft substance which you put on your toothbrush and use to clean your teeth
  • a mixture of chemicals that is sometimes added to toothpaste because it is considered to be good for people's teeth
  • very small organisms