Pcc Tissues

Front 1

What forms the anatomical crown?

Back 1

Epithelia

Front 2

The main substance of a tooth is

Back 2

dentin

Front 3

This tissue covers the anatomical root of a tooth

Back 3

cementum; functionally it is part of the periodontium

Front 4

During enamel and dentin formation, ondontoblats move ___ and ameloblasts move ___.

Back 4

inward; outward

Front 5

What is the difference between anatomical and clinical crown using proper terms?

Back 5

Anatomical: incisor border to CEJ

Clinical: incisor border to GM (gingival margin)

Front 6

How much hydroxyapatite is in:

1) enamel

2) dentin

3) Cementum

Back 6

1) 96%

2) 65%

3) 61%

Front 7

Of Bone, dentin, enamel and cementum which has the largest crystallite dimensions? Which not have a collagen matrix?

Back 7

enamel; enamel

Front 8

Dentin is made by

Enamel is made by

Back 8

odontoblasts

ameloblasts

Front 9

What is the direction of the enamel prisms?

Back 9

Perp to enamel surface

Front 10

T/F. Enamel formation is completed by time tooth erupts.

Back 10

True

Front 11

Describe differential density of dentinal tubules

Back 11

Get more dense as you move deeper.

Front 12

T/F. Pulp gets thicker as you age.

Back 12

FALSE. Dentin gets thicker

Front 13

What is one (of four) cases where you don't need a pulpectomy?

Back 13

Chronic symptoms w/ no pulpal exposure

Front 14

What are the 4 components of periodontium?

Back 14

Cementum, alveolar bone, periodontal ligament, dentogingival junction

Front 15

The PDL is between

Back 15

cementum and alveolar bone

Front 16

T/F. Cementum can be acellular or cellular.

Back 16

True

Front 17

Oral mucosa consists of masticatory mucosa, specialized mucosa, and lining mucosa. Which one is gingiva?

Back 17

Masticatory mucosa

Front 18

Gingiva consists of an epithelial layer and an underlying connective tissue layer called the ___.

Back 18

lamina propria

Front 19

Coronal portion of gingiva terminates in the ___ which is usually scalloped in appearance. The apical portion is continuous with ___.

Back 19

free gingival margin

alveolar mucosa

Front 20

Gingiva and alveolar mucosa are usually separated by a recognizable border called the

Back 20

mucogingival junction

Front 21

Where is there no mucogingival junction?

Back 21

On palate since the hard palate and maxillary alveolar processes are covered by the same type of masticatory mucosa.

Front 22

Macroscopically what is gingiva composed of (two things):

Back 22

Free gingiva (all epi and CT coronal to horizontal line placed at CEJ)

Attached to gingiva (extends from free gingiva to mucoginvial junction)

Front 23

Label

Back 23

Front 24

After eruption is complete, free gingival margin is located ____ coronal to the CEJ.

Back 24

1.5-2mm

Front 25

T/F. The free gingiva forms the interdental papilla.

Back 25

True

Front 26

In posterior teeth, the interdental papillae may have a ___ or concavity in the middle that conforms of the outline of the interdental contact surface.

Back 26

col

Front 27

Attached gingiva often show small depressions in surface named ___ and have an orange peel appearance.

Back 27

Stippling

Front 28

What type of epithelium covers gingiva?

Back 28

Stratified squamous

Front 29

Gingival epithelium is divided into 3 parts microscopically:

Back 29

1) Gingival oral epithelium

2) Gingival sulculuar epithelium

3) Gingival junctional epithelium

Front 30

What are rete pegs and where are they found/not found?

Back 30

Rete pegs are epithelial projections into underlying connective tissue. Present in oral and sulcular epithelium. Lacking in healthy junctional epithelium.

Front 31

T/F. Stipplings occur at function points between epithelial ridges.

Back 31

True

Front 32

T/F. Gingival oral epithelium is keratinized.

Back 32

True

Front 33

T/F. Subsulcular epithelium is attached to the tooth.

Back 33

False! It is facing the tooth extending from oral epithelium to gingival sulcus (apical order is junctional epithelium)

Front 34

Is subsulcular epithelium keratinized?

Back 34

No- parakeratinized or not keratinized.

Front 35

Where is the apical termination of the junctional epithelium

Back 35

the CEJ

Front 36

T/F. Junctional epithelium is keratinized.

Back 36

False

Front 37

Describe the basal laminas of the junctional epithelium.

Back 37

There are two of them: external and internal. External attaches JE to underlying CT. Internal attaches JE to tooth surface via hemidesmosomes.

Front 38

What comprises the "epithelial attachment"?

Back 38

Internal basal lamina + hemidemosomes

Front 39

Of the three types of oral epithelium which is most permeable with fewer desmosomes?

Back 39

junctional epithelum

Front 40

T/F. The junctional epithelium serves as the passage for gingival crevicular fluid and cells from CT to sulcus including bacteria

Back 40

True

Front 41

Gingival CT is mainly composed of

Back 41

networks of collagen fibers (mainly type I)

Front 42

T/F. CT components of gingival CT are embedded in an amorphous ground substance.

Back 42

True

Front 43

These are gingival fiber groups named based on location and insertion. Know their functions: circular, dente-gingival, alveolo-gingival, dento-periosteal, trans-septal

Back 43

-

Front 44

Which of the following is not true about the periodontal ligament?

a) Continuous with CT of gingiva

b) Approximately 0.25 mm in width

c) soft, avascular CT surrounding root

Back 44

C- it is vascular

Front 45

Principle fibers are: alveolar crest fibers, horizontal fibers, oblique fibers, apical fibers, and interradibular fibers. Which:

1) Are most numerous

2) are in furcation area only in multirooted teeth

AHOAI (A ho artificial intelligence)

Back 45

1) oblique

2) interradicular

Front 46

What are Sharpey's fibers?

Back 46

The terminal portions of the principal fibers that are embedded in cementum and bone.

Front 47

Where are Sharpey's fibers more numerous: in cementum or in bone?

Back 47

Cementum (but smaller in diameter)

Front 48

What is between the fibers of the PDL?

Back 48

Ground substance consisting of glycosaminoglycans, laminin and fibronectin. Note that it si 70% water.

Front 49

T/F. Tooth mobility is largely determined by PDL

Back 49

True

Front 50

T/F. The main cellular component of the PDL is collagen.

Back 50

False. It is FIBROBLAST. The PDL has mesenchymal cells that can differentiate into cementoblasts, fiber, and osteo to regenerate all tissues.

Front 51

Describe the coronal margin of alveolar processes.

Back 51

Follows a wavy configuration that follows the course of the CEJ and is located 1.0-1.5 mm from CEJ

Front 52

T/F. The alveolar socket walls are sometimes referred to as cribriform plates due to the numerous perforations that allow nerves and vessel to enter the PDL.

Back 52

True

Front 53

What is dehiscence and fenestration?

Back 53

Dehiscence- When bone covering is missing at the coronal portion

Fenestration- window. Some bone present in most coronal portion.

Front 54

Does cementum have blood vessel and innervation?

Back 54

No.

Front 55

Intrinsic fibers of cementum produced by cementoblasts are oriented in which way?

Back 55

Parallel to long axis of tooth

Front 56

What are the 4 types of cementum?

Back 56

1) Acellular, afibrillar (found at cervical portion of enamel)

2) Acellular, extrinsic fiber (found at coronal/middle portion of root)

3) Cellular, mixed stratified (apical third of root contains extrinsic and intrinsic fibers)

4) Cellular, intrinsic fiber (mainly resorbtion lacunae)