Lecture 1-Periodontal Anatomy

Question 1

Widest attached gingiva?

Answer 1

incisors

Question 2

narrowest attached gingiva?

Answer 2

Pm

Question 3

Lingual narrowest?

Answer 3

Mn Incisors

Question 4

Lingual widest?

Answer 4

Mn molars

Question 5

Keratinized gingiva?

Answer 5

free gingiva +attached gingiva

Question 6

true recession

Answer 6

FGM 1.5-2mm apical to CEJ

Question 7

From basal to granular layer

Answer 7

1. cytoplasmic tonofilaments and # of desmosomes increase

2. # of organelles decrease

Question 8

How wide is BM and what does it contain?

Answer 8

• Present between basal layer of oral epithelium and CT
• 1-2 micrometers
• rich in gylocproteins
• contains protein-polysaccharide complexes

Question 9

2 layers of BM

Answer 9

lamina lucida- adjacent to basal cells

lamina densa- adjacent to CT

Question 10

Absence or presence of stippling exemplifies?

Answer 10

Nothing, just a reflection of how microscopic features are.

Question 11

If KG is 10mm, and sulcus depth is 2mm, how much is AG?

Answer 11

8mm

Question 12

junctional epithelium epithelium

Answer 12

band of stratified squamous non-keratinized epithelium

Question 13

JE length

Answer 13

0.24-1.34mm

Question 14

probe in healthy children is in the

Answer 14

enamel

Question 15

probe in healthy adults is at the

Answer 15

CEJ

Question 16

If PD is 6mm, and FG margin is 5mm coronal to CEJ. Atachment loss?

Answer 16

1mm

Question 17

If a pt has 6mm PD and 2 mm recession, what is the attachment loss?

Answer 17

8mm

Question 18

PD is 6mm. FG is 3mm coronal to CEJ (-3).

Attachment loss =

Answer 18

3mm

Question 19

PD 6, FG right at CEJ,

Attachment loss:

Answer 19

6mm

Question 20

PD: 6, FG: 3mm apical to CEJ

Attachment loss :

Answer 20

9mm

Question 21

Also poss. 6PD, and FG 6mm coronal to CEJ

Attachment loss:

Answer 21

0mm

Question 22

CAL

Answer 22

pocket depth + gingival recession

Question 23

PDL space width usually

Answer 23

0.25mm width

Question 24

fibers of PDL

Answer 24

alveolar crest fibers
horizontal fibers
oblique fibers
apical fibers

Question 25

Cells of PDL

Answer 25

``` fibroblasts osteoblasts cementoblasts osteoclasts epithelial cells nerve fibers epithelial cells of Mallassez ```

Question 26

Cementum

Answer 26

mineralized tissue covering root surface and occasionally small portions of crown of teeth

Question 27

Cementum is similar to bone tissue but

Answer 27

no blood vessels no lymph vessels no innervation no physiologic resorption/remodeling

Question 28

cementum has

Answer 28

continuing deposition throughout life collagen fibers embedded in organic matrix high mineral content (65%); mainly HA

Question 29

In cementum-intrinsic fibers are produced and composed?

Answer 29

produced by cementoblasts | composed of fibers oriented parallel to root

Question 30

extrinsic fibers of cementum are

Answer 30

Sharpey's fibers | produced by PDL fibroblasts

Question 31

acellular, extrinsic fiber cementum found where

Answer 31

coronal or middle portion of root

Question 32

Cellular, mixed stratified cementum found where

Answer 32

apical third of the root and in the furcations

Question 33

Cellular, intrinsic fiber cementum found where

Answer 33

in resportion lacunae

Question 34

cementum thinner at cervical or apical portion of root

Answer 34

cervical

Question 35

Biologic width is

Answer 35

CT+JE; 2.04mm