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Tooth Morphology

50 Questions
Biology Quizzes & Trivia

Study guide for a final.

Questions and Answers
  • 1. 
    Premolars and molars are used for _____ food.
    • A. 

      Tearing

    • B. 

      Cutting

    • C. 

      Grinding

    • D. 

      All of the above

  • 2. 
    Permanent maxillary molars have _____ roots.
    • A. 

      Three

    • B. 

      Four

    • C. 

      Two

    • D. 

      One

  • 3. 
    • A. 

      #4, #5, #12, and #13.

    • B. 

      #14, #15, #24, and #25.

    • C. 

      #20, #21, #28, and #29.

    • D. 

      #34, #35, #44, and #45.

  • 4. 
    • A. 

      5

    • B. 

      10

    • C. 

      20

    • D. 

      8

  • 5. 
    • A. 

      1

    • B. 

      2

    • C. 

      4

    • D. 

      8

  • 6. 
    There are _____ molars in the permanent dentition.
    • A. 

      8

    • B. 

      14

    • C. 

      16

    • D. 

      12

  • 7. 
    Canines are also referred to as:
    • A. 

      Wisdom teeth.

    • B. 

      Eyeteeth.

    • C. 

      Cuspids.

    • D. 

      Both b and c.

  • 8. 
    • A. 

      Darker enamel.

    • B. 

      Relatively thicker enamel.

    • C. 

      Relatively large pulp chambers.

    • D. 

      A tooth crown that is longer in relation to the total tooth length.

  • 9. 
    • A. 

      Lateral incisor, second molar

    • B. 

      Canine, first molar

    • C. 

      Second premolar, first molar

    • D. 

      Canine, first premolar

  • 10. 
    The bony ridge over the labial portion of the roots of the canines that helps to form the facial contours is the:
    • A. 

      Cusp.

    • B. 

      Canus.

    • C. 

      Imbrication line.

    • D. 

      Canine eminence.

  • 11. 
    • A. 

      Maxillary central incisors

    • B. 

      Mandibular incisors

    • C. 

      Maxillary and mandibular third molars

    • D. 

      Mandibular first and second molars

  • 12. 
    Most maxillary first premolars are considered to be ______ because they have a root that is divided into two roots.
    • A. 

      Bifurcated

    • B. 

      Succedaneous

    • C. 

      Trifurcated

    • D. 

      Bicanineate

  • 13. 
    A mandibular canine tooth:
    • A. 

      Usually erupts before the maxillary canine.

    • B. 

      Has a larger and more developed cusp than the maxillary canine.

    • C. 

      Has a sharper cusp tip than a maxillary canine.

    • D. 

      Has a sharper cusp tip than a maxillary canine.

  • 14. 
    The difference(s) between the maxillary and mandibular central incisors is(are):
    • A. 

      Maxillary central incisors are larger than the mandibular central incisors in all dimensions.

    • B. 

      Labial surfaces of the maxillary central incisors are more rounded from the incisal aspect than those of the mandibular central incisors.

    • C. 

      Cingulum in less prominent on the maxillary central incisors than the cingulum on the mandibular central incisors.

    • D. 

      Both a and b.

  • 15. 
    • A. 

      Marginal

    • B. 

      Triangular

    • C. 

      Central

    • D. 

      None of the above

  • 16. 
    The cusp of Carabelli is found on the:
    • A. 

      Premolars.

    • B. 

      Central incisors.

    • C. 

      Maxillary first molars.

    • D. 

      Maxillary second molars.

  • 17. 
    The _____ are sometimes referred to as “wisdom” teeth.
    • A. 

      First molars

    • B. 

      Premolars

    • C. 

      Third molars

    • D. 

      Canines

  • 18. 
    The mandibular lateral incisors are:
    • A. 

      Larger than the maxillary lateral incisors.

    • B. 

      Larger than the mandibular central incisors.

    • C. 

      Larger than the mandibular canines.

    • D. 

      Smaller than the mandibular central incisors.

  • 19. 
    • A. 

      Facial surface.

    • B. 

      Labial surface.

    • C. 

      Incisal edge.

    • D. 

      Incisal ridge.

  • 20. 
    The largest and strongest teeth in the maxillary dentition are the maxillary:
    • A. 

      First molars.

    • B. 

      Second molars.

    • C. 

      Canines

    • D. 

      Central incisors.

  • 21. 
    • A. 

      #16, #26, #36, and #46.

    • B. 

      #3, #14, #19, and #30.

    • C. 

      #2, #15, #18, and #31.

    • D. 

      #18, #28, #38, and #48.

  • 22. 
    • A. 

      Barrel laterals.

    • B. 

      Fused laterals.

    • C. 

      Pegged laterals.

    • D. 

      Dens in dente.

  • 23. 
    • A. 

      Distobuccal cusp slope is shorter than the mesiobuccal cusp slope on the second premolar.

    • B. 

      Cusps of the maxillary first premolar are not as sharp as the maxillary second premolar.

    • C. 

      Second premolar has only one root, and therefore only one root canal.

    • D. 

      Second premolar is wider mesiodistally than buccolingually.

  • 24. 
    • A. 

      12; 8

    • B. 

      8; 0

    • C. 

      8; 4

    • D. 

      4; 4

  • 25. 
    The _____ premolar has two bifurcated roots.
    • A. 

      Mandibular first

    • B. 

      Maxillary first

    • C. 

      Maxillary second

    • D. 

      Mandibular second

  • 26. 
    • A. 

      First molars

    • B. 

      First and second molars

    • C. 

      Premolars

    • D. 

      Canines

  • 27. 
    The raised border on the mesial and distal surfaces of the lingual surface of anterior teeth is the:
    • A. 

      Fossa.

    • B. 

      Cingulum.

    • C. 

      Marginal ridge.

    • D. 

      Mamelon

  • 28. 
    There are how many incisors in each arch of the permanent dentitions?
    • A. 

      2

    • B. 

      4

    • C. 

      6

    • D. 

      8

  • 29. 
    The maxillary second premolar differs from the maxillary first premolar in that the:
    • A. 

      First premolar is more narrow buccolingually than mesiodistally.

    • B. 

      Cusps of second premolars are not as sharp as those of first premolars.

    • C. 

      Lingual cusp is smaller than the buccal cusp on the maxillary second premolar.

    • D. 

      All of the above.

  • 30. 
    There are how many premolars in the permanent dentition?
    • A. 

      2

    • B. 

      4

    • C. 

      6

    • D. 

      8

  • 31. 
    There are no ______ in the primary dentition.
    • A. 

      Molars

    • B. 

      Canines

    • C. 

      Premolars

    • D. 

      Incisors

  • 32. 
    A _____ is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet.
    • A. 

      Fossa

    • B. 

      Pit

    • C. 

      Fissure

    • D. 

      Developmental groove

  • 33. 
    An unusually large space between adjacent teeth is known as a:
    • A. 

      Fossa.

    • B. 

      Mamelon.

    • C. 

      Cusp.

    • D. 

      Diastema.

  • 34. 
    The root of the mandibular second premolar is ______ than that of a mandibular first premolar, but ______ than the roots of the maxillary premolars.
    • A. 

      Smaller; longer

    • B. 

      Longer; shorter

    • C. 

      Smaller; shorter

    • D. 

      Shorter; longer

  • 35. 
    The root of the maxillary lateral incisor:
    • A. 

      Is the same width as the root of the maxillary central incisor.

    • B. 

      Is a bifurcated root.

    • C. 

      May curve slightly to the distal.

    • D. 

      Is the same size as the root of the mandibular lateral incisor.

  • 36. 
    The _____ are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches.
    • A. 

      Canines

    • B. 

      Central incisors

    • C. 

      Lateral incisors

    • D. 

      Molars

  • 37. 
    The smallest teeth in the permanent dentition are the:
    • A. 

      Maxillary lateral incisors.

    • B. 

      Mandibular central incisors.

    • C. 

      Mandibular canines.

    • D. 

      Maxillary central incisors.

  • 38. 
    Using the Universal/National Teeth-Numbering System, what are the numbers for the permanent third molars?
    • A. 

      1, 2, 3, 4

    • B. 

      3, 14, 19, 30

    • C. 

      1, 16, 17, 32

    • D. 

      2, 15, 18, 31

  • 39. 
    The third molars and the _____ vary in form more than any other teeth in the mouth.
    • A. 

      Mandibular canines

    • B. 

      Maxillary lateral incisors

    • C. 

      Maxillary central incisors

    • D. 

      Second molars

  • 40. 
    The size, shape, color, and position of the _____ directly relate to how a person looks.
    • A. 

      Posterior teeth

    • B. 

      Molars

    • C. 

      Anterior teeth

    • D. 

      Premolars

  • 41. 
    Which of the following adult teeth is nonsuccedaneous?
    • A. 

      Maxillary right canine

    • B. 

      Maxillary left second premolar

    • C. 

      Mandibular right lateral incisor

    • D. 

      Mandibular left second molar

  • 42. 
    The rounded enamel extensions on the incisal ridge of newly erupted central and lateral incisors are called:
    • A. 

      Mamelons.

    • B. 

      A fossa.

    • C. 

      A cingulum.

    • D. 

      A marginal ridge.

  • 43. 
    The primary teeth are classified in the Universal/National System using:
    • A. 

      Numbers 1 through 20.

    • B. 

      A number for each quadrant and a number for each tooth.

    • C. 

      Letters A through T.

    • D. 

      Numbers inside a bracket.

  • 44. 
    The area where the cusp ridges converge at a central point on the occlusal surfaces of posterior teeth is the:
    • A. 

      Triangular fossa.

    • B. 

      Central fossa.

    • C. 

      Central groove

    • D. 

      Triangular groove.

  • 45. 
    • A. 

      Which statement is NOT true of the maxillary canines?

    • B. 

      The cusp tip is sharper on a maxillary canine than on a mandibular canine.

    • C. 

      The canines have incisal edges similar to other anterior teeth.

    • D. 

      The crown of the maxillary canine is in longer than the crown of the mandibular canine.

  • 46. 
    Correct contact between adjacent teeth is important because proper contact:
    • A. 

      Helps prevent food from being trapped between the teeth.

    • B. 

      Stabilizes the dental arch by holding teeth in positive contact with each other.

    • C. 

      Protects the interproximal gingival tissue from trauma during chewing.

    • D. 

      Does all of the above.

  • 47. 
    • A. 

      True

    • B. 

      False

  • 48. 
    Centric occlusion is the maximum contact between the occluding surfaces of the maxillary and mandibular teeth.
    • A. 

      True

    • B. 

      Falsa

  • 49. 
    • A. 

      True

    • B. 

      False

  • 50. 
    Class lll of Angles classifications is also considered neutrocclusion
    • A. 

      True

    • B. 

      False