Dentin And Pulp

Front 1

*A foundation of sound dentin serves as a resilient cushion for enamel which prevents the hard but brittle enamel from fracturing off the tooth by dissipating the occlusal forces

Back 1

*

Front 2

What kind of tissue is dentin

Back 2

Specialized CT

Front 3

Percentage of organic compound of dentin

Back 3

30

Front 4

Percentage of inorganic compound of dentin

Back 4

70

Front 5

Is dentin vascular or avascular

Back 5

Avascular

Front 6

How does dentin get its nourishment

Back 6

The pulp, pulp nerves extend part way into the dentin

Front 7

The scalloped border of the DEJ increases

Back 7

Strength of junction between dentin and enamel

Front 8

What is the odontoblastic process

Back 8

Cell process of odontoblast extending through the entire thickness of the dentin from the cell body of the odontoblast to the DEJ

Front 9

Dentin formation occurs

Back 9

Throughout the life of the tooth

Front 10

Dental tubules move

Back 10

Apically and pulpally

Front 11

The main structural element of dentin

Back 11

Dentinal tubules

Front 12

Shapes of odontoblastic processes and the dental tubules in which they are located

Back 12

Primary S curvature

Front 13

Reflects main pathways taken by odontoblasts during dentin formation, move apically and puplally

Back 13

Primary S curvature

Front 14

Delicate curves in the course of odontoblastic processes corresponding the tubules

Back 14

Secondary S curvature

Front 15

Reflects minor deviations in the movement of the odontoblast along their main pathway

Back 15

Secondary S curvature

Front 16

The clinical significance of dentinal tubules

Back 16

Affect rate and pattern of caries

Permeable tissue

Front 17

Reflect the normal diurnal apposition activity of odontoblast

Back 17

Lines of von ebner

Front 18

Forms between the increments of dentin when odontoblasts slow down their activity at night

Back 18

Lines of von ebner

Front 19

Manifests as thick bands, represents areas where dentin is formed and the dentin less mineralized

Back 19

Line of Owen

Front 20

Accentuated lines of Owen occurring at or near birth, disruption of odontoblasts occurs with abrupt change in environment

Back 20

Neonatal

Front 21

Incorporated into dentin during tooth development along with lines of Owen

Back 21

Tetracycline stain

Front 22

All dentin formed during tooth development until completion of apical foramen

Back 22

Primary dentin

Front 23

Dentin form throughout the life of the tooth after formation of apical foramen- only on pulpal side

Back 23

Secondary dentin

Front 24

Outer most layer of primary dentin immediately next to the DEJ

Back 24

Mantle dentin

Front 25

Dentin formed around the pulp excluding the mantle dentin

Back 25

Circumpulpal

Front 26

Majority of dentin is

Back 26

Circumpulpal

Front 27

Collagen source of mantle dentin

Back 27

Fibers produced by odontoblasts

Von korffs fibers

Front 28

Fibers that are produced by pulp fibroblasts, incorporated into dentin, thick, perpendicular to DEJ

Back 28

Von korffs

Front 29

Dentin immediately surrounding the tubules

Back 29

Peritubular

Front 30

Main body of dentin located between the tubules

Back 30

Intertubular

Front 31

*Intertubular forms before the peritubular

Back 31

*

Front 32

Collagen fibers are delicate and neatly arranged- perpendicular to tubules.

Back 32

Peritubular (more mineralized)

Front 33

Collagen fibers are thick and more random

Back 33

Intertubular (less mineralized)

Front 34

Globular and interglobular are seen when there is an

Back 34

Uneven mineralized pattern

Front 35

Uneven mineralized patterns of dentin are most common in

Back 35

Circumpulpal dentin

Front 36

Zone of dentin that does not mineralized properly

Back 36

Globular

Front 37

Refers to the globular appearance of the calcospherites which did not fuse completely

Back 37

Globular dentin

Front 38

Hypomineralized areas of dentin between the calcifies globules of dentin, manifests as dark spaces

Back 38

Interglobular

Front 39

Forms of interglobular dentin in peripheral root dentin

Back 39

Tomes granular layer

Front 40

Formation of secondary dentin forms apical to stimulus due to

Back 40

The S curvature of the tubules

Front 41

Forms slowly in response to a stimulus such as attrition

Back 41

Regularly secondary dentin

Front 42

Secondary dentin that does not for uniformly along the pulpal wall

Back 42

Regular

Front 43

Secondary dentin that has abrupt change in direction of the tubules is evident, yet near arrangement

Back 43

Regular

Front 44

Another name for irregular secondary dentin

Back 44

Tertiary or reactive dentin

Front 45

Secondary dentin that forms rapidly in response to a noxious stimulus such as varies or trauma

Back 45

Irregular secondary dentin

Front 46

Secondary apical to stimulus

Back 46

Irregular

Front 47

Secondary dentin where the odontoblasts May become entrapped in dentin

Back 47

Irregular

Front 48

A group of dentinal tubules in which odontoblastic processes have degenerated in response to noxious stimulus

Back 48

Dead tract

Front 49

Refers to the areas of dentin where the tubules have mineralized by filling in with HA crystals

Back 49

Sclerotic/transparent dentin

Front 50

Sensory nerve ending of the pulp can extend into the tubules but not beyond the

Back 50

Pulpal 1/3

Front 51

Mechanical support of ground substance in the pulp

Back 51

Resist compression, hold pulp elements together

Front 52

Biological support of ground substance of pulp

Back 52

Acts as a medium for diffusion of nutrients

Front 53

Most nerves of the pulp are classified as

Back 53

myelinated afferent (sensory) nerves

Front 54

Nerve branches of the maxillary arch

Back 54

Middle, posterior, and anterior superior alveolar nerves

Front 55

Nerve branches of the Mandibular arch

Back 55

Inferior alveolar nerves

Front 56

Transmits only pain sensations from the teeth

Back 56

Myelinated nerves

Front 57

Nerve that follows blood vessels, causing their constriction when stimulated

Back 57

Unmyelinated

Front 58

Middle region, housing the main blood vessels and nerves

Back 58

Central

Front 59

Peripheral region near cell bodies of odontoblasts

Back 59

Odontogenic region

Front 60

Part of the odontogenic region that is a row of neatly arranged odontoblasts cell bodies

Back 60

Odontoblast layer

Front 61

Part of the odontogenic region that has capillary loops and unmyelinated nerve endings that travel through this zone to the odontoblasts, void of cells

Back 61

Cell-free zone of Weil

Front 62

Part of the odontogenic region that is loaded with fibroblasts and stem cells

Back 62

Cell rich zone

Front 63

Part of the odontogenic region that is a network of myelinated sensory nerves

Back 63

Parietal plexus of Raschkow

Front 64

Inductive function of the pulp

Back 64

Initiated early steps in tooth development

Front 65

Formative function of the pulp

Back 65

Contains cells that forms tissues: fibroblasts and odontoblasts

Front 66

Nutritive function of the pulp

Back 66

Rich blood supply to nourish the dentin

Front 67

Sensory/protective function of the pulp

Back 67

All external stimuli provoke a pain response in the sensory nerves of the pulp

Front 68

Defensive function of the pulp

Back 68

Involves dentin-pulp complex

Front 69

The defensive function involves

Back 69

Formation of secondary dentin

Formation of sclerotic dentin

Inflammatory response

Front 70

A stimulus applied to the orifices of the dentinal tubules cause rapid movement of fluid in the tubules which places pressure in the nerve endings, stimulating pain

Back 70

Hydrodynamic theory of dentinal hypersensitivity