embryo final

Question 1

The central pulp:

Answer 1

makes up the majority of the pulp.

Question 2

Odontoblasts responsible for the production of reparative dentin are derived from:

Answer 2

mesenchymal cells of the cell rich zone.

Question 3

True denticles:

Answer 3

are most commonly at the furcation of multirooted teeth.

Question 4

Pulp horns:

Answer 4

are part of the coronal pulp.

Question 5

Fine fibers of the dental pulp:

Answer 5

are found in the central pulp.
stain with silver.
are similar to beta fibrils of dentin.
are found in the peripheral pulp.

Question 6

Odontoblasts:

Answer 6

can be found in the canal of the apical foramen.

Question 7

Most of the sensory nerve endings in the pulp are located in the

Answer 7

dentinal tubules.

Question 8

The cell free zone of Weil is located between the:

Answer 8

odontoblasts and the cell rich zone.

Question 9

The blood vessels of the pulp:

Answer 9

can enter ‘through accessory root canals.

Question 10

The canal of the apical foramen:

Answer 10

may be lined by cementum.

Question 11

In the gingiva, orthokeratinized stratified squamous epitheli­um is normally found:

Answer 11

in the depressions between gingival stipples.
at the free gingival margin.
at the free gingival groove.

Question 12

The free gingival groove:

Answer 12

forms functionally, with age.

Question 13

The interdental groove is part of the:

Answer 13

attached gingiva.

Question 14

The col is:covered with fully keratinized epithelium.

Answer 14

covered with fully keratinized epithelium.

Question 15

The principal fibers of the gingival ligament which attach the tooth to the outer surface of the alveolar bone are the:

Answer 15

dentoperiosteal fibers.

Question 16

The lamina propria of the gingiva has all of the following except :

Answer 16

mature elastic fibers.

Question 17

The lamina propria of the gingiva has all of the following

Answer 17

capillaries.
large collagen bundles.
long connective tissue papillae.
lymphocytes and macrophages.

Question 18

The cell in the epithelium of the gingiva responsible for recognizing foreign antigens is the:

Answer 18

Langerhans cell.

Question 19

The dental cuticle:

Answer 19

cements the epithelium to the tooth.

Question 20

During phase 2 of passive eruption,:

Answer 20

the junctional epithelium lies on both enamel and cementum.

Question 21

The principal fiber group of the periodontal ligament which absorbs most of the force of mastication is the:

Answer 21

oblique fibers.

Question 22

The larger blood vessels and nerves of the periodontal membrane are found:

Answer 22

in the interstitial rests.

Question 23

The special fibers which anchor blood vessels in the periodon­tal membrane are the:

Answer 23

oxytalin fibers

Question 24

Interradicular fibers prevent movement of the tooth in a direction that is:

Answer 24

apical.

lateral.

Question 25

The collagen fiber of the PDL that spans from inside the tooth to inside the bone is made by:

Answer 25

cementoblasts, osteoblasts and fibroblasts.

Question 26

The alveolar bone proper is sometimes called a cribriform plate because it:

Answer 26

has many foramina.

Question 27

part of the alveolar process that is composed of compact bone is the:

Answer 27

cortical bone.

Question 28

Bundle bone:

Answer 28

actually attaches the PDL to the bone,

Question 29

When a tooth is moved by orthodontic techniques, all of the following occur except:

Answer 29

the periodontal membrane remains wider.

Question 30

a radiograph, the lamina dura:

Answer 30

shows the shape of the alveolus. indicates the areas of the attachment of the tooth. is the result of the presence of bundle bone. is thicker than the actual alveolar bone proper.

Question 31

Pre-eruptive movement of teeth will compensate for all of the following changes except:

Answer 31

growth of the root.

Question 32

Clinical eruption of a primary tooth is the point at which the:

Answer 32

tooth becomes visible in the oral cavity.

Question 33

During the shedding process, an odontoclast may resorb any of the following tissues except:

Answer 33

alveolar bone.

Question 34

Select the incorrect statement concerning the shedding of a primary molar.

Answer 34

tooth is usually shed before all of the root is resorbed.

Question 35

The TMJ is a joint which involves all of the following except

Answer 35

frontal bone

Question 36

As a result of the translatory movement in the TMJ, the

Answer 36

condyle slides along the temporal bone

Question 37

The articular disk:

Answer 37

is made of collagen fibers

Question 38

The none of the above synovial fluid in the TMJ:

Answer 38

provides nutrients for the articular disk

Question 39

All of the following might indicate the possibility of a TMJ problem except :

Answer 39

feelings of hunger

Question 40

In order to have a healthy and properly balanced TMJ, which of the following conditions must be satisfied?

Answer 40

teeth in proper occlusion absence of muscle spasms tendons and ligaments in good working order

Question 41

Fordyce's spots:

Answer 41

may be found in the upper lip

Question 42

A whitish thickened ridge in the buccal mucosa

Answer 42

linea alba

Question 43

Which part of the oral cavity has the thickest | layer?

Answer 43

gingiva

Question 44

All of the following are found associated with of the oral cavity except :

Answer 44

hard palate

Question 45

Deglutition is involved with:

Answer 45

food movement

Question 46

Amalgam tattoo is associated with:

Answer 46

the gingiva

Question 47

Tall, narrow connective tissue papillae are associated with:

Answer 47

the hard palate

Question 48

Xerostomia is associated with:

Answer 48

salivary glands

Question 49

The only keratinized papillae are the

Answer 49

filiform papilla

Question 50

Salivary corpuscles in saliva represent:

Answer 50

degenerating white blood cells

Question 51

All of the following are major salivary glands except :

Answer 51

buccal

Question 52

The best known bacteria-fighting protein(s) is(are):

Answer 52

lysozyme

Question 53

cause bacteria-to clump together.

Answer 53

mucus | .immunoglobulins

Question 54

The human, adult parotid gland:

Answer 54

has a well formed connective tissue capsule

Question 55

Myoepithelial cells:

Answer 55

stimulate cells to secrete

Question 56

The main excretory duct of the parotid:

Answer 56

none of the above

Question 57

Select the statement that best describes the sublingual gland.

Answer 57

has mucous alveoli

Question 58

The buccopharyngeal membrane ruptures during the week of development.

Answer 58

tenth

Question 59

The dental lamina will grow into the underlying connecting tissue in how many locations in the upper jaw?

Answer 59

10

Question 60

The cap stage of a developing tooth will have all of the following following layers present except :

Answer 60

stratum intermedium

Question 61

The dental sac will give rise to:

Answer 61

Cementoblasts

Question 62

The stratum intermedium:

Answer 62

contributes enzymes to enamel formation

Question 63

The vestibule develops from the:

Answer 63

oral epithelium

Question 64

During dentin and enamel formation:

Answer 64

the root begins to form

Question 65

Predentin:

Answer 65

is unmineralized matrix

Question 66

According to the Keyhole Hypothesis, an enamel rod is formed from ameloblasts.

Answer 66

4

Question 67

In the ameloblast, a reversal of polarity means that:

Answer 67

organelles move to a different part of the cell

Question 68

Fluoride is an effective protective agent for the tooth because:

Answer 68

enamel is permeable

Question 69

The hardness of enamel is related to:

Answer 69

hydroxyapatite crystals

Question 70

The etching of enamel:

Answer 70

is used in bonding techniques

Question 71

Enamel rods:

Answer 71

extend from the DEJ to the free surface of the enamel

Question 72

Lines of Retzius:

Answer 72

are hypermineralized

Question 73

Enamel lamellae:

Answer 73

may look like cracks | can be found extending into dentin

Question 74

Enamel is yellow because:

Answer 74

of the presence of dentin

Question 75

Attrition refers to:

Answer 75

the absence of collagen in enamel

Question 76

- may be found in enamel.

Answer 76

A. odontoblastic processes B. tufts C. lamellae D. spindles

Question 77

In comparison to dentin, the hydroxyapatite crystals in | enamel:

Answer 77

are larger

Question 78

The bulk of a mature tooth is:

Answer 78

dentin

Question 79

Hypomineralization is also known as:

Answer 79

hypocalcification

Question 80

Mantle coars

Answer 80

has Korff’s fibers

Question 81

Dentin is considered to be a living tissue because:

Answer 81

of the presence of odontoblastic processes

Question 82

Hydroxyapatite crystals are composed of:

Answer 82

calcium

Question 83

Areas of hypominerization normally found in primary dentin is known as dentin.

Answer 83

interglobular

Question 84

Dentinal tubules:

Answer 84

1. are all "S"shaped

Question 85

________ dentin forms in the. roots of teeth of older people as a protective mechanism.

Answer 85

transparent

Question 86

All of the following statements describe Tome's Granular Layer except:

Answer 86

found in the crown

Question 87

Secondary regular dentin:

Answer 87

narrows (make smaller) the size of the pulp chamber

Question 88

Reparative dentin:

Answer 88

protects the pulp

Question 89

28. Hertwigs epithelial root sheath is formed from the:

Answer 89

inner enamel epithelium and outer enamel epithelium.

Question 90

Root formation begins:

Answer 90

when dentin and enamel formation reach the cervical loop.

Question 91

Epithelial rests of Malassez:

Answer 91

are remnants of the epithelial root sheath.

Question 92

The epithelial diaphragm: :

Answer 92

determines the size of the apical foramen.

Question 93

Cementoblasts are derived from the:

Answer 93

mesenchyme of the dental sac.

Question 94

Acellular cementum:

Answer 94

is laid down in layers (lamellae).

Question 95

Mature cementum:

Answer 95

is softer than dentin.

Question 96

Most of the collagen in cementum is:

Answer 96

in the form of Sharpey's fibers.

Question 97

The most common type of cemento-enamel junction is one in which:

Answer 97

cementum overlaps enamel.

Question 98

Cementum is held to dentin at the CDJ by:

Answer 98

intertwined collagen fibers.

Question 99

In cellular cementum, lacunae:

Answer 99

have many canaliculi.

Question 100

All of the follow statements about cementum are true except:

Answer 100

more resistant to bacteria than enamel.