DH 1350 Quiz 12 Chap 13

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DH 1350 Quiz 12 Chap 13
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2014-11-15 23:38:36
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DH 1350 Quiz 12 chap 13
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DH 1350 Quiz 12 chapter 13
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  1. Which cells are responsible for producing dentin?

    Ameloblasts
    Cemetoblasts
    Odontoblasts
    Osteoblasts
    Odontoblasts
  2. Dentin can be removed by dental hygiene
    instrumentation.

    True
    False
    true
  3. Dentin develops from which of the following embryonic tissues?

    Ectoderm
    Ectomesenchyme
    Endoderm
    Mesoderm
    Ectomesenchyme AND Mesoderm
    Ectomesenchyme AND Endoderm
    Ectomesenchyme AND Mesoderm
  4. Which of the following WILL NOT be found in the dentinal tubule?

    Afferent Axon
    Dentinal Fluid
    Efferent Axon
    Odontoblastic Process
    Efferent Axon
  5. The mineral content of enamel and dentin are, respectively: 

    96% and 70%
    80% and 70%
    96% and 60%
    90% and 50%
    96% and 70%
  6. In the process of dentin maturation,
    _______________ mineralization is when calcium hydroxyapatite crystals form as
    globules that calcify and expand, but do not fuse completely.
    secondary
  7. Dentin is on the average about _____ %
    mineralized by weight.

    50
    65
    70
    96
    70
  8. Match the following terms with their descriptors:

    peritubular dentin
    mantle dentin
    circumpulpal dentin
    intertubular dentin

    makes up the bulk of the tooth having collagen fibers arranged parallel to the DEJ

    is very prevalent in mantel dentin

    found between the dentinal tubules

    first predentin to form having fibers perpendicular to the CEJ
    is very prevalent in mantel dentin

    first predentin to form having fibers perpendicular to the CEJ

    makes up the bulk of the tooth having collagen fibers arranged parallel to the DEJ

    found between the dentinal tubules
  9. The peritubular dentin that is found
    surrounding each odontoblastic process is:

    not true dentin
    less calcified than intertubular dentin
    more calcified than intertubular dentin
    not different from intertubular dentin
    more calcified than intertubular dentin
  10. The _____ fluid in the tubule is presumably tissue fluid surrounding the cell membrane of the odontoblast.
    dentinal
  11. Like enamel, dentin is avascular.

    True
    False
    true
  12. Of the two types of curvature established by the direction of the denitnal tubules over time, _____curvature resemlbes a large "S"-shaped curve.
    primary
  13. Whether it is touch, hot, cold, or any other stimulus, the nerves of a tooth only translate the message to the brain as _________.
    pain
  14. Match the following terms with their descriptors:

    primary dentin
    secondary dentin
    tertiary dentin

    continues to form throughout life of the tooth

    formed before completion of the apical foramen

    formed quickly with an irregular pattern of tubules
    formed before completion of the apical foramen

    continues to form throughout life of the tooth

    formed quickly with an irregular pattern of tubules
  15. In which location is the cell body of the odontoblast found in a mature, healthy  erupted tooth?

    along the dentinoenamel junction
    in the outer pulpal wall
    near the dentinocemental junction
    within the pulpal core
    along the cementoenamel junction
    in the outer pulpal wall
  16. Match the following terms with their descriptors:

    imbrication lines of von ebner
    contour lines of owen
    tome's granular layer

    demonstrate a disturbance in body  metabolism that affects the odontoblasts by altering their formation efforts

    spotty microscopic appearance found adjacent to the DCJ

    incremental lines that can be likened to growth rings of trees
    incremental lines that can be likened to growth rings of trees

    demonstrate a disturbance in body  metabolism that affects the odontoblasts by altering their formation efforts

    spotty microscopic appearance found adjacent to the DCJ
  17. The ___________ pulp is in the crown are of the tooth, while ___________ pulp is in the root(s) of the tooth.
    • coronal
    • radicular
  18. Which of the following features of the pulp will make endodontic therapy more difficult?

    Accessory Canals Only
    Pulp Stones Only
    Apical Foramen Only
    Pulp Horns Only
    Pulp Stones & Accessory Canals
    Apical Foramen & Pulp Horns
    Pulp Stones & Accessory Canals
  19. Which cell type is most prominent in the pulp?

    Odontoblasts
    Fibroblasts
    Red Blood Cells
    Neurons
    fibroblasts
  20. During cavity preparation of a tooth, care MUST be taken to preserve the:

    Enamel rod fluid
    Support of the dentinal tubules
    Cemental vascularity
    Vitality of the pulp
    Vitality of the pulp
  21. The dentin and pulp share many of their
    functions, which of the folowing is ONLY accomplished by the PULP?

    Formation of Dentin
    Sensory
    Protective
    Nutritional
    Nutritional
  22. List two (2) causes of pulpitis ____  and ____ .
    • extensive caries
    • cavity preparation
    • traumatic injury
  23. MULTIPLE ANSWERS

    Which of the following descriptors describe what happens to dentin with increased age?

    Becomes more translucent

    Diameter of the dentin tuble increases/widens

    sensitivty to simtulation

    Odontoblats have increased organelle content

    More exposure due to attrition and gingival recession
    • sensitivity to stimulation
    • More exposure due to attrition and gingival recession
  24. Which of the following pulp structures is formed when Hertwig’s epithelial root sheath encounters a blood vessel?

    pulp horn
    pulp chamber
    apical foramen
    accessory canal
    odontoblastic layer
    accessory canal
  25. Which of the following terms associated with dentin can be used to CORRECTLY describe the largest portion of the tooth’s dentin?

    Tomes’ granular layer
    mantle dentin
    circumpulpal dentin
    interglobular dentin
    peritubular dentin
    circumpulpal dentin
  26. MULTIPLE ANSWERS

    Which of the following are characterisitics
    of the developmental disturbance  dentinogenesis imperfecta?

    A type of dentin dysplasia

    Teeth appear blue-gray or brown

    Teeth lack an opalescent sheen

    The apposition and maturation of enamel is normal

    There is severe atrrition due to the prevalence of globular dentin
    • A type of dentin dysplasia
    • Teeth appear blue-gray or brown
    • The apposition and maturation of enamel is normal
  27. Which of the following describes a pronounced band due to the trauma of birth present on the cross section of both enamel and dentin?

    line of Retzius
    imbrication line of von Ebner
    neonatal line
    contour line of Owen
    perikymata
    neonatal line

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