The Dentin-Pulp Complex and Its Role in Cariology

Question 1

Largest portion of the tooth structure, extending almost the full length of the tooth

Answer 1

Dentin

Question 2

The hardness of the dentin is about 1/5 the hardness of the enamel.

Answer 2

True

Question 3

Both dentin and pulp are derived from where

Answer 3

Mesoderm

Question 4

The enamel is slightly darker than the dentin

Answer 4

False

Question 5

Distinct, large-diameter collagen fibrils

Answer 5

von Korff’s fibers

Question 6

Formed by the elongation and growth of the cervical loop into the dental sac

Answer 6

Hertwig Epithelial Root Sheath (HERS)

Question 7

Both primary and secondary mineralization occurred and has complete crystalline fusion

Answer 7

Globular dentin

Question 8

Only primary mineralization occurred in the predentin and the globules do not fuse completely

Answer 8

Interglobular dentin

Question 9

Hereditary type of dentin of dentin dysplasia where the normal enamel chips off due to lack of support by the abnormal underlying dentin

Answer 9

Dentinogenesis Imperfecta

Question 10

Most common dentinogenesis imperfecta

Answer 10

Type II

Question 11

Dentinogenesis imperfecta associated with osteogenesis imperfecta

Answer 11

Type I

Question 12

Small canals that extend through the entire width of dentin, from the pulp to the DEJ

Answer 12

Dentinal tubules

Question 13

More mineralized than intertubular dentin

Answer 13

Peritubular dentin

Question 14

Much more permeable than root dentin

Answer 14

Coronal dentin

Question 15

When dentin is exposed due to caries, cavity preparation, gingival recession, or attrition

Answer 15

Dentin Hypersensistivity

Question 16

Odontoblastic processes that crossed the DEJ into the enamel

Answer 16

Enamel spindles

Question 17

May serve as pain receptors, explaining enamel sensisitivity

Answer 17

Enamel spindles

Question 18

Incremental lines of bands of dentin apposition similar to the incremental lines of Retzius in enamel

Answer 18

Imbrication lines of von Ebner

Question 19

Series of dark bands which are adjoining parallel imbrication lines

Answer 19

Contour lines of Owen

Question 20

Peripheral part of dentin beneath the root’s cementum, adjacent to the dentinocemental junction

Answer 20

Tomes Granular Layer

Question 21

Unmineralized zone of dentin immediately next to the odontoblasts

Answer 21

Predentin

Question 22

First predentin that forms and matures near the DEJ

Answer 22

Mantle dentin

Question 23

Formed before completion of apical foramen and more rapidly.

Answer 23

Primary dentin

Question 24

Formed after completion of the apical foramen and slower.

Answer 24

Secondary dentin

Question 25

Formed as a result of localized injury to dentin

Answer 25

Tertiary dentin

Question 26

Reaction to a long-term, low level acid demineralization in slowly advancing lesions, and can only be formed when the tooth pulp is vital.

Answer 26

Sclerotic dentin

Question 27

Reaction to a moderate-intensity attack and has severe stimuli that can result in the formation within the pulp chamber of unattached dentin.

Answer 27

Reparative dentin

Question 28

Reaction to severe, rapidly advancing caries characterized by very high acid levels

Answer 28

Pulpal necrosis

Question 29

Exposed portion of the reactive sclerotic dentin, resistant to acid attack, hard and darkened

Answer 29

Eburnated dentin

Question 30

Deepest zone of dentin caries lesions

Answer 30

Zone 1: Hard dentin

Question 31

Template for remineralization of intertubular dentin

Answer 31

Intact collagen

Question 32

Inner carious dentin

Answer 32

Zone 2: Firm Dentin

Question 33

Outer carious dentin

Answer 33

Zone 3: Soft dentin

Question 34

Intact smooth white lesions of discolored brown/black lesions

Answer 34

Inactive/Arrested caries

Question 35

Innermost soft, connective tissue of the tooth

Answer 35

Dental pulp

Question 36

Lines of the outer pulpal wall and consists of odontoblasts and may form secondary dentin

Answer 36

Odontoblastic layer

Question 37

Contains fewer cells than odontoblastic layer

Answer 37

Cell-free zone

Question 38

Increased density of cells and more extensive calcular supply

Answer 38

Cell-rich zone

Question 39

Center of pulp chamber

Answer 39

Pulpal core

Question 40

Function of the pulp that supplies nutrients and moisture to dentin through the blood vascular supply to the odontoblasts and their processes

Answer 40

Nutritive

Question 41

Formative/developmental function of the pulp is the production of primary and tertiary dentin by odontoblasts

Answer 41

False

Question 42

Response to irritation by mechanical, thermal, chemical, or bacterial stimuli

Answer 42

Defensive/reparative

Question 43

Adult teeth have larger pulp

Answer 43

False

Question 44

Narrowing of dentinal tubule diameter, deposition of peritubular dentin

Answer 44

Aging

Question 45

Mineralized masses of dentin either amorphous or complete with dentinal tubules

Answer 45

Denticles

Question 46

Denticles are formed during tooth development or as a response to microtrauma

Answer 46

True

Question 47

Symptom-free and normal responsive to pulp testing

Answer 47

Normal pulp

Question 48

Discomfort is experienced when a stimulus such as cold or sweat is applied and goes away within seconds following removal of stimulus

Answer 48

Reversible pulpitis

Question 49

Sharp, lingering, and spontaneous pain that may be accentuated by postural changes and OTC analgesics are usually ineffective

Answer 49

Symptomatic Irreversible Pulpitis

Question 50

Vital inflamed pulp is incapable of healing, trauma, or deep caries that would likely result in exposure

Answer 50

Asymptomatic Irreversible Pulpitis

Question 51

Death of the pulp and non-responsive to pulp testing

Answer 51

Pulp necrosis

Question 52

ADA-recommended nonrestorative treatment for cavitated caries lesions that is also topically applied

Answer 52

Silver diamide fluoride

Question 53

Cutting debris produced and unavoidably compacted into a layer on the cut surface during tooth preparation with rotary instruments

Answer 53

Smear layer

Question 54

Prevent collagen collapse with excessive air drying

Answer 54

Etched dentin

Question 55

Prevent pulpal involvement with caries or tooth wear

Answer 55

Pulp protection

Question 56

Use of copious water coolant during tooth preparation

Answer 56

Thermal medication

Question 57

Relief of pulpal inflammation, facilitation of dentin bridging

Answer 57

Pulpal medication

Question 58

Use of bases to provide resistance to thin dentin

Answer 58

Mechanical protection

Question 59

Removal of the vital coronal pulp and usually done of primary teeth without abscess and spontaneous pain

Answer 59

Pulpotomy

Question 60

Done on non-vital pulp and is complete removal of the coronal and radicular pulp

Answer 60

Pulpectomy

Question 61

Complete removal of the pulp with shaping and obturation of the canals

Answer 61

Root canal treatment

Question 62

Endodontic procedure that aims to either induce a hard tissue barrier in a tooth with open apex or the continued apical development of an incomplete root in teeth with apical periodontitis

Answer 62

Apexification

Question 63

Vital pulp therapy to encourage continued root development and maturation with normal root thickness

Answer 63

Apexogenesis

Question 64

Newer methods; allows continued root development in terms of both length and thickness

Answer 64

Revascularization and regeneration

Question 65

Dentin that is closer to the enamel is harder than dentin closer to the pulp

Answer 65

True

Question 66

Dentin formation stops when the roots of teeth are already completed

Answer 66

False

Question 67

Dentinal tubules are larger near the pulp

Answer 67

True

Question 68

Iatrogenic pulp exposure is less likely in deep carious lesions of young teeth than in aged teeth

Answer 68

False