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

18. How many roots do mandibular molars have?

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?