Perio

Question 1

In tooth dvlpment, dental papilla gives rise to__________
it forms at______stage

Answer 1

• dental pulp & odontoblast
• cap stage

Question 2

Neural Crest Cells derive into________

Answer 2

Dental papillia & follicle

Question 3

T/F, stabillization of dental arch a fxn of periodontium ?

Answer 3

T

Question 4

Tooth start erupting once_____of root length is completed ?

Answer 4

2/3

Question 5

Mucogingival junction seperates____________?

Answer 5

ATTACHED gingiva & alveolar mucosa

Question 6

• Gingival col connects which 2 things ?
• it is (keratinized/non-keratinized)

Answer 6

• Labial & Lingual id papilla
• Non keratinized

Question 7

What are the 3 parts of Gingival Epithelium

Answer 7

Oral (outer) epithelium, Sulcus epithelium, Junctional epithelium

Question 8

Periodontium consist of which 4 parts ?

Answer 8

gingiva, periodontal ligament, root cementum, alveolar bone proper

Question 9

Is alveolar mucosa part of gingiva ?

Answer 9

No

Question 10

Gingival col (is/is not) keratinized

Answer 10

is not

Question 11

Gingival collagen fibers are type____&_____

Answer 11

1 & 4

Question 12

• What is the fxn of gingival epithelium ?
• what is the main cell type

Answer 12

• protect deeper structures
• kerotinocyte

Question 13

What are the 3 levels of keratinization ?

Answer 13

ortho, para and nonKeratinized

Question 14

Which level of keratinization undergo complete keratinization

Answer 14

ortho

Question 15

In parakeratinization epithelium, stratum corneum retains___________

Answer 15

pyknotic nuclei

Question 16

• Gingival epithelium contains which 4 types of cells ?
• Which cell is asso w/ sense of light touch discrimmination ?

Answer 16

• Keratinocytes, Langerhan cells, Melanocytes, Merkel Cells
• Merkel cells

Question 17

Is junctional epithelium a keratinizing epithelium ?

Answer 17

No

Question 18

Is sulcular epithelium a keratinizing epithelium ?

Answer 18

No

Question 19

Is oral epithelium a keratinizing epithelium ?

Answer 19

Yes

Question 20

________epithelium sits between internal & external basal lamina ?

Answer 20

Junctional

Question 21

-________of junctional epithelium is firmly attached to enamel surface @________(level), which forms epithelial barrier against________

Answer 21

Internal basal lamina, CEJ level, plaque bacteria

Question 22

The turnover time for junctional epithelium cells is_______days

Answer 22

~4-6

Question 23

Junctional epithelial cells probably have_______property which is also found in macrophages

Answer 23

Endocytic

Question 24

What is the definition of root cementum ?

Answer 24

mineralized but heterogeneous CONNECTIVE TISSUE

Question 25

- Organic content of cementum__________ - Inorganic content of cementum__________

Answer 25

- 50-55% collagen type 1 + glycoprotein - 45-65% hydroxyapatite

Question 26

Cementum or dentine is softer

Answer 26

Cementum

Question 27

Thickness of cementum: - coronally=_______um - apically=_______um

Answer 27

- 16-60 - 150-200

Question 28

T/F, cementum's AA composition is similar to bone and the same between coronal & apical cementum ?

Answer 28

F, similar to bone but differ between coronal & apical

Question 29

Cementum shows lifelong deposition/apposition in (coronal/apical) area ?

Answer 29

Apical

Question 30

Cementum inc in thickness up to___times in 60 years ?

Answer 30

3

Question 31

Root cementum contains which 3 types of cells ?

Answer 31

Cementoblast, cementoclast, fibroblast (specialized)

Question 32

- Acellular Afibrillar Cementum (AAC) is located over_______ - its main component is________

Answer 32

- Over cervical enamel @CEJ - GlycosAminoGlycans

Question 33

- Acellular Extrinsic Fiber Cementum (AEFC) is located________ - It is mainly formed by________

Answer 33

- coronal 2/3 of root - fibroblast & cementoblast

Question 34

- Cellular Mixed-fiber Stratified Cementum (CMSC) is found in_________ - It is formed by__________ - It contains what kind of cells ?

Answer 34

- apical portion of root & furcations - Conversion of acellular to cellular by unknown factors after 2/3 of roots completed forming - Cementoblast & Cementocytes

Question 35

- Cellular Intrinsic Fiber Cementum (CISC) is located in________ - it contains what kind of cells ?

Answer 35

- root surface undergoing repair - Cementocytes ONLY

Question 36

Sharpey's fibers are made of which 3 types of collagen fibers ?

Answer 36

1,3,7

Question 37

Sharpey's fibers are bundles of collagen fibers connecting____________

Answer 37

Cementum to periosteum of alveolar bone

Question 38

Sharpey's fibers go in (one/different) directions to________

Answer 38

different, distribute the force

Question 39

Occlusal forces are take up by which type of sharpey's fibers ?

Answer 39

Oblique ONLY

Question 40

The scallop bone margin is more pronounced in_______teeth

Answer 40

Anterior

Question 41

- Normal distance from Scallop margin to CEJs in VESTIBULAR is______mm, & in LINGUAL is_______mm

Answer 41

(VESTIBULAR) 1-2.4mm, (LINGUAL) 1.5mm

Question 42

- Thickness of alveolar bone proper=_______mm - Alveolar bone proper anchors_______

Answer 42

- 0.1-0.4 - Sharpey's fiber

Question 43

Pericoronitis is an inflammatory condition of the gingiva surrounding an erupting tooth, especially, impacted wisdom teeth. Which of the following statement regarding the microbiology of pericoronitis is correct? In the majority of cases, one infecting specie predominates in these lesions Microbiology of asymptomatic and symptomatic pericoronitis are distinctly different from each other Species implicated in caries formation can often be found to be associated with pericoronitis lesions as well Obligate aerobic species of bacteria are often found to be involved in these lesions Species implicated in periodontal disease can often be found to be associated with pericoronitis lesions as well

Answer 43

Species implicated in periodontal disease can often be found to be associated with pericoronitis lesions as well