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Histopathology > Exam II Practice Questions > Flashcards

Exam II Practice Questions Flashcards

1
Q

What causes pre-odontoblasts to line up along basal lamina?

A

Fibronectin

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2
Q

What is NOT found in the pulpal zone:

A

Parietal plexus

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3
Q

T/F Each nerve fiber gives 4 branches to Raschkow plexus. Most fibers are free unmyelinated nerve endings.

A

First statement false, second statement true

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4
Q

What is true about tomes granular layer

A

Interglobular dentin

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5
Q

T/F: Cementicles can be free, embedded, or attached. The number of them decreases with increasing age.

A

First statement true, second statement false

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6
Q

Clinical case with cupped occlusal surfaces, defects on lingual enamel & exposed dentin:

A

Erosion
Ask if they eat acidic foods

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7
Q

Thick cementum on roots in radiographic image may indicate:

A

Hyper cements is

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8
Q

Image of cyst in gingiva may incdicate

A

Gingival cyst

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9
Q

What causes gingival cysts?

A

Rests of Serres

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10
Q

Where is the cementum thinnest?

A

CEJ

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11
Q

What fibers give fast sharp localized pain?

A

A-delta fibers

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12
Q

Sympathetic branches are from:

A

Superior cervical ganglion

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13
Q

What provides sensory afferent innervation?

A

Trigeminal nerve (CN 5)

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14
Q

T/F: Interradicular fibers only found in multirooted teeth. They keep adjacent teeth together:

A

Both true statements

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15
Q

T/F: Textbook question- Epithelial rests of Malassez found in PDL and their function in the PDL

A

No known function but it is believed they may play a role in cementogenesis

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16
Q

T/F: Peritubular dentin is less calcified that’s intertubular dentin:

A

False

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17
Q

Mature odontoblasts can make 2’ dentin. Damage to these cells causes subodontoblastic stem cells to differentiate & make 3’ dentin:

A

Both statements true

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18
Q

CASE STUDY: Patient Maxillilary CI is knocked out from baseball. You sanitize it and insert it back into alveolar bone. What reparative cell mechanism is most likely?

A

Alveolar bone secretes cells & fuses cementum to bone

(Severe injury —> Ankylosis)

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19
Q

What makes up biological width?

A

Junctional epithelium & GFL

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20
Q

CASE STUDY: Patient comes in after crown in placed & has inflamed gums. There is a 0.5mm distance. What do you tell them?

A

The biological width has been compromised

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21
Q

T/F: Raschkow’s plexus does NOT form before roots are completely developed

A

False

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22
Q

T/F: Presence of carbonate apatite core in enamel is more soluble to acid. Fluoride can replace hydroxyl ions and be less susceptible to acid dissolution.

A

Both true

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23
Q

Which fibers are responsible for resisting rotational forces?

A

All PDL fiber groups

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24
Q

Wound healing step:

A

Fibroblasts & osteoblasts replace damaged tissue

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25
Q

Which statement is false about lateral root canals (according to text)?

A

False there was no treatment option available

  • The successful treatment of these endodontic-periodontics lesions is dependent on determining in which of the tissues the disease process originated
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26
Q

GCF Fluid goes through gingival epithelium, what could it be used for in the future?

A

Markers assist in identifying those who are most vulnerable to the spread of infection from gingivitis to periodontitis

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27
Q

Patient prevents to you with case. They complain of pain and you deduce that the tooth is mobile. What is accountable for this mobility?

A

Due to occlusal trauma, resorption of alveolar bone parallel to the long axis of the tooth

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28
Q

How would a quick inflammatory response occur in the pulp horn?

A

Leakage through fenestrated capillaries

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29
Q

Schwann cells provide Myelination for what axons?

A

A-delta & A-beta

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30
Q

T/F: Mesial movement of premolar during ortho treatment causes mesial compression & resorption of bone. Distal area has tension & exhibits bone deposition.

A

Both true

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31
Q

T/F: Dental pulp collagen is largest extracellular component making up 25-32%. Most prevalent is type I & III collagen

A

First statement is true second statement is false - because only type 3 is most prevalent in dental pulp

32
Q

Sympathetics cause:

A

Vasoconstriction

33
Q

There are two types of cementocytes, lacunae & canaliculi. Lacunae house cell bodies whereas canaliculi provide communication and have cytoplasmic projections

A

Both true

34
Q

Exposed cementum:

A
  • Facilitated endotoxin absorption
  • Faciliated attachment of plaque & calculus
  • It is hypermineralized, which prevents the reabsorption of collagen
    (All of the above)
35
Q

What cranial nerve is the trigeminal nerve?

A

CN V

36
Q

According to your text, what is a characteristic of the Vermillion Border?

A

Blood vessels close to surface

37
Q

Remove boney thing from buccal surface of #3. You then drain blood from alveolar bone & apply some sort of sheet over the area. This prevents what cells from healing the injury?

A

Epithelial cells

38
Q

T/F: Cementum differentiated by dental matrix growth factors can be reached through fenestration of Hertwig’s sheath

A

True

39
Q

T/F: Dentinogenesis imperfecta is characterized by bluish-grey teeth. Enamel is affected just like dentin.

A

First statement true, second statement false

40
Q

T/F: Tertiary dentin is released immediately in response to outside forces. It is laid down in a clean fashion.

A

First statement is true, second statement is false.

41
Q

T/F: Dentin tubules have a bigger diameter at DEJ. There are more of them at the DEJ.

A

Both false

42
Q

Dentin matrix proteins:

A

-GLA Proteins
-Help mineralize hydroxyapatite
-Controlling size of hydroxyapatite crystals
(All of the above)

43
Q

If you are given a lateral periodontal cyst, which one is false?

A

Treatment is NOT necessar & the cyst will resolve on its own (That’s false)

44
Q

The stimulus for ectomesenchymal cell differentiation into pre-odontoblasts appears to be derived from _____ located within the basal lamina of the inner enamel epithelium

A

Fibronectin

45
Q

Odontoblast matrix vesicles contain all the following except:

A

Acid phosphatase

46
Q

Growth factors secreted by inner enamel epithelium that play a role in odontoblast differentiation include all of the following EXCEPT:

A

PDFG

Include: TFF, BMP, IFG, FGF

47
Q

The organic matrix of dentin includes all of the following components except for:

A

Except for: fibronectin & laminin

(It does include: Type I, III, V collagen, Proteoglycans & glycosaminoglycans, Sialoprotein, Sialophosphoprotein, Osteonectin & Osteopontin)

48
Q

The organic matrix of dentin is deposited incrementally at a rate of _____ microns per 24 hours

A

4 to 8

49
Q

Incremental lines of Von Ebner’s are thought to represent a hesitation in the matrix formation & subsequently altered mineralization that occurs every _____ days of matrix deposition

A

4 to 20

50
Q

All of the following features found in dentin represent areas of hypomineralization EXCEPT:

A

Perikymata

(Hypomineralization areas include: Contour lines of Owen, Neonatal lines, Tome’s granular layer, Interglobular dentin)

51
Q

Because of the decreasing volume of the pulp chamber the number of dentinal tubules per unit area at the surface is 40,000/mm^2 and about ____ that number of the DEJ

A

1/2

52
Q

Which of the following features of dentin is found ONLY in the root?

A

Tome’s granular layer

53
Q

Dentin formed after a tooth reaches functional occlusion is predominantly ____ dentin

A

Seconday

54
Q

All of the following are features of sclerotic dentin EXCEPT:

A

Always occurs as a reparative response to pulpal injury

(Features of sclerotic dentin include: Hyperminearlized, does not contain tubules, may form in response to dental caries, increase incidence with increasing age)

55
Q

All of the following are features of dentinogenesis imperfecta EXCEPT:

A

Except: Short or blunted roots

56
Q

All of the following bacteria may produce dental caries EXCEPT:

A

Except for: Prevoltella intermedia

57
Q

All of the following are causes of dental sensitivity EXCEPT:

A

Dehydration from mouth breathing

58
Q

The theory most commonly considered to best explain dentinal sensitivity is the _____ theory:

A

Brannstrom Hydrodynamic theory

59
Q

According to the textbook, the yellowish color of teeth that occurs with increasing age is due to:

A

Increase in the presence of sclerotic dentin

60
Q

According to the text, the dentinal “smear layer” is a result of:

A

Instrumentation

61
Q

The odontogenic zone of the dental pulp consists of all the following cell layers EXCEPT:

A

Parasympathetic neural zone

62
Q

The reparative function of dental pulp is closely related to the formation of:

A

Tertiary dentin

63
Q

The macrophages & dendritic cell population of the dental pulp comprise ____ % of the total pulpal cell population

A

8%

64
Q

Sympathetic nerves to the dental pulp are derived from the ___ ganglion

A

Superior cervical

65
Q

Fast conducting nerve fibers from dental pulp have a diameter of 1-6 micrometers and are associated with sharp, located pain are termed _____ fibers

A

A-delta

66
Q

All of the following neuropeptides have been identified in the dental pulp EXCEPT:

A

Seratonin

67
Q

Majority of nerve axons located in intratubular dentin are:

A

??

68
Q

In regards to pulpal blood vessels, all of the following are true EXCEPT:

A

Radicular pulp exhibits the greatest density of capillary loops

69
Q

False denticles (pulp stones) are characterized by all of the following EXCEPT:

A

??

70
Q

A dense aggregation of neutrophils & macrophages and other inflammatory cells within connective tissue undergoing liquefactive necrosis

A

Abcess

71
Q

Syncytial macrophages refers to:

A

Fusion of macrophages to form multinucleated giant cells

72
Q

In the hierarchy of mineralized tissues (enamel, bone & dentin) cementum exhibits:

A

Least degree of mineralization

73
Q

Cementum at the CEJ is approximately ____ microns thick

A

30-50 microns

74
Q

An end-to-end junction of enamel and cementum has an incidence of occurrence of approximately:

A

30%

75
Q

Cementicles are a response to all of the following EXCEPT:

A

Multiple restorations on same tooth

Histopathology (15 decks)

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