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Histopathology > Exam II Questions > Flashcards

Exam II Questions Flashcards

1
Q

What causes pre-odontoblasts to line up along the 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 fiber gives 4 branches to Raschkow’s 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 Tome’s 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 and exposed dentin:

A

Erosion- ask if they eat acidic foods

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7
Q

Thick cementum on the root in radiograph:

A

Hypercementosis

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8
Q

Images of cyst in gingiva:

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 the thinnest?

A

CEJ

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11
Q

What fibers give rise to fast, sharp, localized pain?

A

A-Delta

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12
Q

Sympathetic branches are from:

A

Superior cervical ganglion

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13
Q

What nerve provides sensory afferent innervation?

A

Trigeminal nerve (CN5)

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14
Q

T/F: Interradicular fibers only found in multi-rooted teeth. They keep adjacent teeth together.

A

I THINK BOTH STATEMENTS TRUE???

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15
Q

T/F: Textbook question: Epithelial rests of malassez found in PDL and their function in PDL:

A

True- function unknown but may play a role in cementogenesis

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16
Q

Peritubular is less calcified than 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 and make 3’ dentin.

A

Both statements true

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18
Q

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

A

Alveolar bone secretes cells and fuses cementum to bone

Severe injury= ankylosis

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19
Q

What makes up biological width?

A

Junctional epithelium and GFL

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20
Q

Case Study: Patient comes in after crown is placed and 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: Raschkows plexus does NOT form before the roots are completely developed:

A

FALSE

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22
Q

T/F: The presence of carbonate apatite core in enamel is more soluble than 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 fibers

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24
Q

Wound healing step:

A

Fibroblasts and osteoblasts replace damaged tissue

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25
Q

Which statement is false about lateral root canals?

A

False that there is not treatment options available

  • The successful treatment of these endodontic-periodontics lesions is dependent on determining in which of teh 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

Marker assist in identifying those who are most vulnerable to the spread of infection from ginigivitis to periodontitis

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27
Q

Patient presents 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 , 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 and A-beta

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30
Q

T/F: Mesial movement of premolar during ortho treatment causes mesial compression and resorption of bone. Distal area has tension and 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 1 and 3 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 and canaliculi. Lacunae house cell bodies whereas canaliculi provide communication and have cytoplasmic projections:

A

Both true

34
Q

Exposed cementum:

A
  • Facilitates endotoxin absorption
  • Facilitates attachment of plaque and 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 5

36
Q

According to your text, what is the characteristic of the vermillion border?

A

Blood vessels close to surface

37
Q

Remove bones thing from buccal surface of #3. You then drain blood from alveolar bone and 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 the at the DEJ.

A

Both statements false

42
Q

Dentin matrix proteins:

A
  • GLA proteins
  • Help mineralize hydroxyapatite
  • controlling size of hydroxyapatite crystal

(ALL OF THE ABOVE)

43
Q

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

A

Treatment is not necessary and the cyst will resolve on its own (thats 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

Odontoblasts matrix vesicles contains all of the following except:

A

Acidphosphatase

46
Q

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

A

EXCEPT PDGF

(Includes: TGF, BMP, IGF, FGF)

47
Q

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

A

Except for: fibronectin and laminin

(It does include: Type 1, 3, and 5 collagen, proteoglycans and glycosaminoglycans, sialoprotein, and sialophosphoproteins, osteonectin and osteopontin)

48
Q

The organic matrix of dentin is deposited incrementally at a rate of ___ microns per 24 hrs.

A

4 to 8

49
Q

Incremental lines of von Ebner are thought to represent a hesitation in the matrix formation and subsequently altered mineralization that occurs every _____ days of matrix deposition

A

4-20

50
Q

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

A

Perikymata

(Hypmineralization areas include: contour lines of owen, Neonatal lines, Tome’s granular layer, and interglobular dentin)

51
Q

because of the decreasing volume of the decreasing volume of the pulp chamber, the number of definitional tubules per unit area at the surface is 40,000/mm2 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 tooth reaches functional occlusion is predominantly _____ dentin.

A

Secondary

54
Q

All of the following are features of sclerotic dentin except:

A

EXCEPT: always occurs as a reparative response to pulpal injury

(Features of sclerotic dentin include: hypermineralized, 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: prevotella 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 and 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 r derived from the ____ ganglion

A

Superior cervical

65
Q

Fast conduction nerve fibers found in the dental pulp that have a diameter of 1 to 6 micrometers and are associated with shaft, localized pain and termed ____ fibers

A

A-delta

66
Q

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

A

Serotonin

67
Q

The 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

Redicular 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 and macrophages and other inflammatory cells within connective tissue undergoing liquetfactive necrosis:

A

Abscess

71
Q

Syncytial macrophages refers to:

A

Fusion of macrophages to form multinucleated giant cells

72
Q

In the hierarchy of mineralized tissue (Enamel, bone and dentin), cementum exhibits:

A

least degree of mineralization

73
Q

Cementum at the CEJ is approximately _____ microns thick

A

30-50

74
Q

An end-to-end jucntion of enamel and cementum has an incidence of occurrence of approximately ____%

A

30

75
Q

Cementicles are a response to all of the following with:

A

Multiple restorations in the same tooth over time

Histopathology (15 decks)

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