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Oral Histology > Finals Examination LECTURE > Flashcards

Finals Examination LECTURE Flashcards

1
Q

Bone adjacent to periodontal ligament

A

Bundle Bone

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2
Q

Most Abundant Periodontal fiber ligament

A

Oblique Fibers

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3
Q

Most collagen synthesis occurs inside

A

Fibroblasts

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4
Q

Which of the these groups is not attached to the alveolar bone

A

Transseptal Fibers

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5
Q

Principal periodontal fibers are attached to the

A

Bundle Bone

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6
Q

Sharpey’s fibers are derived from

A

Dental Follicle

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7
Q

Periodontal fibers seen from cementum of one tooth to another cementum surface of another

A

Transseptal Fibers

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8
Q

Location of Cementicles

A

Periodontal Ligament

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9
Q

Rests of Malassez found in the periodontal ligament are derived from

A

Odontogenic Epithelium

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10
Q

Initiates development of supporting tissues of the tooth

A

Dental Follicle

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11
Q

Interglobular spaces

A

Are formed during the course of globular mineralization

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12
Q

A major difference between secondary and primary dentin is

A

there is less dentinal tubules with secondary dentin

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13
Q

Cementum is continuously secreted depending on the vitality of cementum (true or false)

A

False

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14
Q

Which is true of the following

A

The physiological secondary dentin contain dentinal tubules

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15
Q

Amelogenesis and dentinogenesis are similar in which respect

A

Both processes involve maturation with hydroxyappatite crystals

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16
Q

Cementum deposition cervically on enamel surface is due to

A

premature degeneration of epithelial root sheath of Hertwig

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17
Q

Age changes will increase

A

in cementum thickness

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18
Q

Which among the following is not true about Junctional epithelium

A

terminal end of gingival sulcus

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19
Q

Stippling disappears in

A

geriatrics

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20
Q

Alveolar bone is that part of maxilla and mandible that surrounds and supports the tooth (True or False)

A

True

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21
Q

Gingival epithelium in most cases is

A

parakeratinized

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22
Q

Under reduced occlusal forces, the periodontal ligament appears thin, the PDL fibers reduce in number and density, the number and thickness of the alveolar bone trabeculae are reduced. What is this phenomenon termed

A

Attrophy

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23
Q

Concrescence is:

A

A union of root structure of two or more teeth through cementum only

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24
Q

What structure is formed in the crown first

A

Dentin

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25
Q

No basal lamina is found between the cells of the

A

stratum intermedium and inner dental epithelium

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26
Q

The epithelial root sheath of Hertwig disintegrates:

A

After odontoblastic differentiation & dentin matrix deposition

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27
Q

A layer of cells that seems to be essential to enamel formation but does not actually secrete the enamel is

A

Stratum intermedium

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28
Q

The stimulus that initiates the actual formation of enamel matrix seems to be

A

Presence of predentin

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29
Q

The number of roots that are formed is determined by the

A

Number of medial ingrowths at the epithelial diaphragm

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30
Q

Odontoblasts start their secretory activity:

A

Before enamel matrix production

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31
Q

Apposition stage is confined to

A

Bell Stage

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32
Q

The process of differentiation of mesenchymal cells into odontoblasts is called

A

Induction

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33
Q

Epithelial rests of Malassez are

A

Epithelial remnants of the epithelial root sheath of Hertwig only

Network or isolated islands in the P.L. only

Epithelial strands and may undergo degeneration only

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34
Q

If Hertwig’s epithelial root sheath does not disintegrate

A

No cementum will be formed on the radicular dentin

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35
Q

which of the following is not component of the dental organ

A

Odontoblasts

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36
Q

Which of the following is associated with an erupted tooth?

A

Epithelial rests of Malassez

37
Q

Which of the following contain blood vessels?

A

Dental Sac

38
Q

The development of the root begins when

A

The inner and outer dental epithelium reaching the future C.E.J

39
Q

The apposition stage of tooth development begins

A

When the first layer of dentine is deposited

40
Q

dental pulp, except

A

highly vascularized part of the periodontium

41
Q

In a developing tooth, if Hertwig’s sheath and the epithelial diaphragm failed to form, the resulting tooth would exhibit:

A

No radicular dentin

42
Q

A 20 year old man falls down and chips the incisal edge of his maxillary central incisor, reducing the length of the crown. A dentist informs him that the tooth may erupt a little to compensate for the loss. This tooth movement is likely to result in increase in size of which of the following dental tissues?

A

Cementum

43
Q

A 20 year old man falls down and chips the incisal edge of his maxillary central incisor, reducing the length of the crown. A dentist informs him that the tooth may erupt a little to compensate for the loss. This tooth movement is

A

Passive Eruption

44
Q

A 20 year old man falls down and chips the incisal edge of his maxillary central incisor, reducing the length of the crown. A dentist informs him that the tooth may erupt a little to compensate for the loss.

This tooth movement involves the traction force of periodontal ligament.
(True or False)

A

False

45
Q

A patient complains of loss of taste, and a numb sensation in the left half of his tongue, after removal of his left lower wisdom tooth. Which of the following nerves is most likely to have been injured during removal of this tooth?

A

Lingual Nerve

46
Q

A deep carious lesion in a tooth reaches the pulp. The pulp responds by vasodilatation. There is migration of white blood cells into the pulp. This response is most likely to be initiated by what cells ?

A

Lymphocytes

47
Q

A deep carious lesion in a tooth reaches the pulp and causes so much pain. Which response of the pulp is appropriate with the description.

A

Inflammatory Response

48
Q

A deep carious lesion in a tooth reaches the pulp causing sharp pain. What nerves might be active with this pain?

A

Alpha Fibers

49
Q

Tooth 46 is infected (with abscess). Which is the nearest drainage of waste materials/ infection?

A

Submandibular Lymph Nodes

50
Q

A 13 year old boy presents to his general dental practitioner with a broken upper incisor tooth of one day duration. He complains of pain in the tooth when drinking cold water. On examination the enamel of the incisal edge has been chipped off, and the underlying dentin exposed. Which of the following contents of the dentinal tubule is most likely to be responsible for the pain felt by the patient?

A

Odontoblastic Process

51
Q

Which of the following types of dentin is continuously produced throughout life?

A

Circumpulpal Dentin

52
Q

Which is most likely to be destroyed first by caries when gingiva is receeded?

A

Cementum

53
Q

During cavity preparation a dentist drills deeply into a tooth and exposes the pulp chamber. The dentist covers the exposed pulp issue with a calcium hydroxide cement, and reassures the patient. Which of the following cells of the pulp are most likely to be responsible for healing and repair in this area?

A

Odontoblasts

54
Q

Most principal fibers of the periodontal ligament insert into

A

Cementum

55
Q

During orthodontic treatment, movement of the tooth is achievable by resorption and formation. Which dental tissue actively is involved in this circumstance

A

alveolar bone

56
Q

Cementoid contains collagen fibers. (TRUE OR FALSE)

A

True

57
Q

Sharpey’s fibers, except:

A

are responsible for tooth stability

58
Q

Gingival massage through tooth brushing increases the circulation of blood in gingival vessels in the

A

Lamina Propria

59
Q

All of the following structures may be found in oral mucous membrane except

A

muscularis mucosae

60
Q

gingiva is only present in the presence of tooth (True or False)

A

True

61
Q

Cementocytes arise when

A

cementoblasts are entrapped by cementoid

62
Q

Pain originates in the pulp due to

A

free nerve endings in the vicinity of the odontoblastic cells

63
Q

pain in the periodontium is felt because of

A

Proprioceptive nerve endings

64
Q

The papillae not containing taste buds

A

filiform papillae

65
Q

Pick the correct series that lists the parts of the mature tooth in the order of increasing inorganic content.

A

pulp, cementum, dentin, enamel

66
Q

Most calcified periodontium structure

A

Cementum

67
Q

For extrusion movement (movement out of alveolar socket), what periodontal ligament opposes this movement

A

Apical Fibers

68
Q

Which feature of cellular cementum best differentiates it from acellular cementum?

A

Lacunae

69
Q

In mature dental tissues, the only tissue whose cells are lost is

A

enamel

70
Q

which of the following is not part of the group

a. cribriform plate
b. cortical bone
c. alveolar bone proper
d. bundle bone

A

Cortical Bone

71
Q

At least half of the nerve fibers found in human teeth are______slow conducting __________fibers

A

unmyelinated, D fibers

72
Q

the dental pulp contains nerve endings for

A

Temperature

73
Q

functions of dental pulp except:

-sends impulses to CNS
-nerve supply to enamel through fibers
-nerve supply to dentin
-formation of dentin

A

nerve supply to enamel through fibers

74
Q

the radicular pulp is continuous with periodontium area through

A

apical foramen

75
Q

Weil’s zone is

A

cell free zone

76
Q

pulp stones are found, except

-along dentinal walls
-in aged tooth
-in the apical foramen
-along canal orifice

A

in the apical foramen

77
Q

aging process affects pulp tissue by:

A

decreasing the shape and size of pulp tissue and cellular component

78
Q

fibers of the gingiva usually provides support to the

A

all

79
Q

connects free and attached gingiva

A

valley like depression found in the distal and mesial of adjacent tooth

80
Q

The trajectory pattern is less prominent in the maxilla because of the proximity of the maxillary sinus and nasal cavity. (TRUE OR FALSE)

A

True

81
Q

Neurovascular bundle serves to direct blood flow away from the capillaries. (true or false)

A

False

82
Q

Lines of salter marks the difference in the degree of matrix calcification resulting in the bonding of the dentin. (true or false)

A

False

83
Q

Interglobular dentin is a defect of dentinal matrix formation (true or false)

A

False

84
Q

cheeks arises from oral vestibule (true or false)

A

False

85
Q

Vitality of the pulp depends on the presence of odontoblast. (true or false)

A

False

86
Q

Vitality of the periodontal ligament depends on the cementum (true or false)

A

False

87
Q

Prickle cells are connected by intercellular ridges (True or false)

A

True

88
Q

Salivary glands of oral cavity are mixed in their secretions (True or False)

A

True

Oral Histology (2 decks)

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