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20. The thin fold of mucous membrane that extends from the floor of the mouth to the underside of the tongue is the ________________________.

12. What type of tissue covers the oral cavity?

5. The ____________ is the smooth surface of the frontal bone directly above  the root of the nose.

17. What term is given to a tooth that does not replace a primary tooth?

5. The _____________ is the surface of the tooth distant or away from the midline.

8. The space between the teeth and the inner mucosa lining of the lips in the ________________.

14. What is the proper term for the “gums”?

15. What is another term for unattached gingiva?

20. Which primary tooth has an H-shaped groove pattern on its occlusal surface?

12. What feature do newly erupted central and lateral incisors have on their incisal edge?