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DEN 7111 Development > Exam 3 - Sample Final Questions > Flashcards

Exam 3 - Sample Final Questions Flashcards

1
Q

If a tooth is out of function, all of the following could occur EXCEPT one. Which one is the EXCEPTION?
A. the periodontal ligament width decreases
B. the cribriform plate of the alveolus becomes irregular
C. the principal fiber bundles become disoriented
D. the tooth may hypererupt due to increased dentin production

A

D. the tooth may hypererupt due to increased dentin production

(due to cellular cementum not dentin)

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2
Q

Which of the following developmental events in tooth induction comes first?
A. changes in epithelial gene expression
B. Epithelium induces ectomesenchyme through paracrine signals
C. Ectomesenchyme induces epithelia through paracrine signals
D. Transfer of odontogenic potential from epithelia to ectomesenchyme
E. Changes in mesenchymal gene expression

A

B. Epithelium induces ectomesenchyme through paracrine signals

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3
Q

Which gingival fiber group has an attachment to bone?
A. Circular
B. Dentogingival
C. Alveologingival
D. Dentoperiosteal

A

C. Alveologingival

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4
Q

Tomes’ processes are most prominent during which of the following stages in the life cycle of the ameloblast?
A. Maturative
B. Secretory
C. Organizing
D. Morphogenic

A

B. Secretory

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5
Q

Which of the following is produced at 4 microns/day?
A. Contour lines of Owen
B. Imbrication lines of Von Ebner
C. Stria of Retzius
D. Cemental Lamellae
E. Enamel cross striations

A

E. Enamel cross striations

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6
Q

The basal lamina between the inner dental (enamel) epithelium and the dental papilla is the future site of which of the following?
A. Papillary layer
B. Dentinoenamel Junction
C. Cementoenamel junction
D. Nasmyth’s membrane

A

B. Dentinoenamel Junction

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7
Q

All of the following statements regarding the reduced enamel epithelium are correct EXCEPT one. Which one is the EXCEPTION?
A. It initially contributes to the formation of the epithelial attachment
B. It protects the crown of the tooth prior to eruption
C. It is the source of odontoclasts in successional replacement
D. It produces the primary cuticle
E. It forms as a result of compression of the enamel organ during the crown stage

A

C. It is the source of odontoclasts in successional replacement

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8
Q

Which of the following would most likely not be of developmental origin?
A. Gnarled enamel
B. Granular layer of Tomes
C. Tufts
D. Crack
E. Lamellae

A

D. Crack

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9
Q

Demineralization of the enamel of the crown of the tooth
A. can only occur if fermentable carbohydrates are present
B. is always termed “dental caries”
C. always requires the presence of plaque bacteria
D. requires the presence of an acid environment
E. occurs only in patients with xerostomia

A

D. requires the presence of an acid environment

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10
Q

Perforation of the root sheath (Hertwig) prior to radicular odontoblast differentiation would likely result in the formation of which of the following?
A. Accessory canal
B. Cusp of Carabelli
C. Cementicle
D. Enamel pearl

A

A. Accessory canal

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11
Q

With age, the dental pulp
A. is more highly innervated
B. contains less collagen
C. Decreases in volume
D. Becomes highly cellular

A

C. Decreases in volume

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12
Q

Which transcription factor notably switches expression from the dental epithelium to the ectomesenchyme during reciprocal induction?
A. Lhx-7
B. Lef-1
C. Pax-9
D. FGF-4

A

B. Lef-1

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13
Q

The most abundant protein in the body is which of the following?
A. elastin
B. Proteoglycans
C. fibronectin
D. collagen

A

D. collagen

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14
Q

Oxytalan fibers would be found in the:
A. Aorta
B. Dental pulp
C. Periodontal ligament
D. Reduced enamel epithelium

A

C. Periodontal ligament

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15
Q

The masticatory mucosa is typically
A. Nonkeratinized
B. Parakeratinized
C. Orthokeratinized

A

C. Orthokeratinized

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16
Q

In the dental pulp, the nerve plexus of Rashkow would be found in the
A. DEJ
B. Apical area
C. cell free zone
D. central pulp

A

C. cell free zone

17
Q

The 5 day cyclical production of dentin is represented by which of the following histologic features?
A. Lines of Von Ebner
B. Transparent dentin
C. Interglobular spaces
D. Contour lines of Owen
E. Stria of Retzius

A

A. Lines of Von Ebner

18
Q

The largest papilla on the tongue are the:
A. fungiform
B. circumvallate
C. filiform
D. foliate

A

B. circumvallate

19
Q

LIM homeobox (Lhx) 6 and 7:
A. Are not directly involved in tooth development, but cause the periodontal ligament to develop
B. Drive differentiation of the ectomesenchyme, preparing it to play its part in reciprocal induction
C. Are expressed by the ectomesenchyme and cause penetration of blood vessels into the developing dental pulp
D. Are expressed by the dental epithelium and direct the formation of the enamel organ

A

B. Drive differentiation of the ectomesenchyme, preparing it to play its part in reciprocal induction

20
Q

Currently, most of the force that drives tooth eruption is thought to originate from:
A. Development of the alveolar socket
B. Pressure from the developing roots
C. Development of the PDL
D. Hydrostatic pressure from the vascular supply of the tooth

A

C. Development of the PDL

21
Q

Which pair of salivary glands contributes to a majority of stimulated salivary flow?
A. Palatal
B. Submandibular
C. Parotid
D. Sublingual

A

C. Parotid

22
Q

Salivary volume is regulated primarily by which of the following?
A. Interlobular ducts
B. Striated ducts
C. Intercalated ducts
D. Secretory acini

A

B. Striated ducts

23
Q

The innermost layer (adjacent to the dental papilla) of Hertwig’s Epithelial Root Sheath is a continuation of which of the following?
A. Stellate reticulum
B. Outer enamel epithelium
C. Inner enamel epithelium
D. Stratum intermedium

A

C. Inner enamel epithelium

24
Q

The predominant buffer in saliva is which of the following?
A. Urea
B. Carbonic acid
C. Fluoride
D. Bicarbonate

A

D. Bicarbonate

25
Q

A growth factor highly associated with enamel knot signaling is
A. TGF-Beta-1
B. FGF-8
C. PDGF
D. FGF-4

A

D. FGF-4

DEN 7111 Development (19 decks)

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