DH 1350 quiz 4 chap 6 part 1 tooth development

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anatomy2012
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DH 1350 quiz 4 chap 6 part 1 tooth development
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2014-09-22 17:53:47
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tooth development embryology and histology chapt 6 part 1 quiz
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  1. which of the following statements are correct when considering odontogenesis

    clear cut beginning and end point to the process
    does not include the maturation of the dental tissues
    parallels the formation of the face
    does not have any iddentifiable stages
    parrallels the formation of the face
  2. oral epithelium is derived from ectoderm as  a result of embryonic folding

    true of false
    true
  3. the initiation stage of odontogenesis MAINLY involves the process of

    differeintitation
    proliferation
    induction
    morphohgenesis
    induction
  4. the dental lamina is an embryonic structure that develops from the
    oral epithelium
    mesenchyme
    neural crest cells
    endodermal layer
    oral epithelieum
  5. where does the dental lamina begin to form initially in the developing dental arches

    near the midline
    adajacent to the mental foramen
    over the region of the furture molars
    adajacent to the developing temporomandi ular joint
    near the midline
  6. how many buds in the dental lamina appear along each dental arch during odontogenesis of the primary dentition

    5
    10
    15
    20
    10
  7. order the stages of odontogeneisis

    bud
    cap
    bell
    initiation
    maturation
    • cap
    • bud
    • bell
    • maturartion
    • initiation
  8. match the stages of odontogenesis with the corresonding descriptions

    ectoderm lineing of stomodeum gives rise to oral epithelium and then dental lamina
    growth of dental lamina penetrates growing ectomesenchyme
    formation of tooth germ as enamel organ surrounds inside mass of dental papilla with outside mass of dental sac
    differintiation of enamel organ into four cell types and dental papilla into two cell types
    dental tissue types secreted in successive layers as matrix
    dental tissue types fully mineralize to mature form

    cap, apposition, bell maturation,bud, initiation
    • initiation
    • bud
    • cap
    • bell
    • apposition
    • maturation
  9. which stage of tooth development occufrs between the 11th and 12th weeks of prenatal development

    bud
    cap
    bell
    initiation
    • bud
    • the bell stage occurs between 11 and 12 of prenatal development, the initiation stage occurs between weeks 6 and 7 of tooth development, the bud stage occurs during week 8 whereas the cap stage happens betweeen weeks 9 and 10
  10. each of the following is a component of the tooth germ EXCEPT one which is it

    enamel organ
    dental sac
    dental lamina
    dental papilla
    dental follicle
    • dental lamina.
    • this thickened sheet of epithelium will give way to become the enamel organ.  the 3 components that make up the tooth germ are the enamel organ, the dental sac and the dental papilla dental follicle is another term for dental sac
  11. in the development of a tooth the structure called the dental sac is a derivagtive of the

    dental lamina
    mesoderm (mesenchyme)
    ectoderm
    dental papilla
    mesoderm
  12. the dental sac of a develping tooth germ gives rise to the

    outer layer of tooth pulp
    the periodontal ligament
    the enamel cuticle
    the dentin layer of the tooth
    the periodontal ligament
  13. which of the folloiwng will be the future pulp and dentin of a tooth

    tooth germ
    enamel organ
    dental sac
    dental papilla
    none of the above
    dental papilla
  14. which primoridial structure differentiates into the ameloblasts that produce enamel

    outer enamel epithelium
    stellate reticulum
    inner enamel epithelium
    stratum reticulum
    inner enamel epitheliium
  15. which of the following does not come from the mesoderm embryonic layer

    alveloar bone
    dentin and pulp
    cementum
    peroidontal ligament
    none of these
    none of these
  16. enamel develops from which of the following embryonic tissues

    ectoderm
    mesoderm
    endoderm
    ectomesenchyme
    both ectomesenchyme and ectoderm
    ectoderm
  17. which of the following serves as a  support for enamel production

    stellate reticulum
    IEE
    basement memberane
    outer cells of the dental papilla
    none of the above
    stellate reticulum
  18. which of the following embryonic structures becomes the dentinoenamel junction (DEJ)

    inner cells of the dental papilla
    outer cells of the dental papilla
    outer enamel epithelium of the enamel organ inner enamel epitheliuym of the enamle organ
    the basement memberane between the enamel organ and dental papilla
    the basement membrane between the enamel organ and dentla papilla
  19. the outer cells of the dental papilla are induced to differeintiate into

    pulp tissue
    preameloblasts
    odontoblasts
    ementoblasts
    ameloblasts
    odontoblasts
  20. which developmental distubance appears as a tooth within a tooth on radiologic examination

    fusion
    tubercles
    gemination
    dens in dente
    dens in dente
  21. a tooth with gemination will display to pulp chambers and two roots on a radiograph

    true or false
    false
  22. after the inner enamel epithelium differeintitates into preameloblasts the outer cells of the dental papilla are induced by the preameloblasts to differentiate into ameloblasts

    true of false
    false
  23. enamel hypocalcification is a type of enamel dysplasia that involves

    an increased number of ameloblasts
    reduction in the quantity of enamel matrix
    reduction in the quality of enamel maturation
    extrinsic staining of the dental cutilce on the enamel surface
    reduction in the quality of enamel maturation
  24. which of the following structures is NOT part of the enamel organ

    stellate reticuluml
    stratum intermediium
    ondontoblastic layer
    outer epithelial cells
    inner epithelial cells
    ondontoblastic layer
  25. which of the following changes occurs to those speicific cells fromthe enamel organ which will differeintiate into preameloblasts

    they shorten their lenght
    they repolarize their nuclei
    they mineralize cellular contents
    they line up along the basement memberane
    they repolarize their nuclei
  26. the dental sac of a developing tooth germ gives rise to the

    outer layer of tooth pulp
    the periodontal ligament
    the enamel cuticle
    the dentin layer of the tooth
    the periodontal ligament
  27. nonsuccedaneous permanent teeth develop from buds that grow off an extension of the

    successional dental lamina
    palatal shelves
    intermaxillaary segement
    lingual portion of the initial dental lamina
    primary second molars dental lamina
    primary second molars dental lamina

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