Periodontium

Question 1

periodontium has three principle components

Answer 1

1. alveolar process
2. cementum
3. periodontal ligament

Question 2

perio develops during a series of complex interaction of

Answer 2

mesenchyme, HERS, and dentel follicle

Question 3

gomphosis

Answer 3

fibrous peg-in-socket joint

Question 4

origin of osteoblast

Answer 4

surrounding mesenchymal tissue

Question 5

origin of cemtoblast: HERS/follicle cells

Answer 5

ectomesenchyme cells

Question 6

origin of PDL fibroblast

Answer 6

follicle cells/ectomesenchymecells

Question 7

origin of odontoblast:

Answer 7

formdentinpart of the cemento-dentaljunction, dental pailla

Question 8

the perioduntium contains ___ types of mineralized tissues found in the oral cavity

Answer 8

3 of 4

Question 9

alveolar process: formed by

Answer 9

intramembranous ossification

Question 10

alveolar process: begins during

Answer 10

8th week of uterine life

Question 11

alveolar bone proper is

Answer 11

compact bone, lines the socket

Question 12

supporting alveolar bone is

Answer 12

compact and trabecular

Question 13

cortical plates:

Answer 13

compact bone component, central

Question 14

Spongiosa

Answer 14

trabecular bone componet

Question 15

cribrum=

Answer 15

sieve, it has volksmann’s canals running through it

Question 16

lamina dura is

Answer 16

radiographic term :area of PDL attachment

Question 17

bundle bone

Answer 17

histological term: sharpey’s fibers (PDL) embedded in bone

Question 18

alveolar bone proper: inner

Answer 18

constantly being remolded, smooth in young/rougher with age

Question 19

cortical plate inner

Answer 19

lingual and palatal surface

Question 20

cortical plate outer

Answer 20

labial and buccal surface

Question 21

central spongiosa

Answer 21

1. trabecular (spongy/cancellous) bone supporting alveolar bone proper and cortical plate
2. Marrow- red (hemopoietic) in young, yellow with aged

Question 22

maxilla, spongiosa ___ prevalent than mandible

Answer 22

more

Question 23

often abesent/diminished in ____ region of bothjaws

Answer 23

anterior

Question 24

interradicular septum is

Answer 24

bony septum between roots of a single tooth

Question 25

interalveolar septum

Answer 25

bony septum between adjacent teeth

Question 26

function of alveolar bone

Answer 26

1. protect/stucture of socket for tooth to rest in 2. attachment of sharpy's fibers of PDL(embedded in bone) 3. support of tooth roots, especially facial/lingual 4. distribution of loading from the tooth and PDL to surrounding bone

Question 27

PDL composed of

Answer 27

fibroblast, mesenchymal, epithelial cells and macrophages

Question 28

associated with PDL

Answer 28

osteo blats/clast and cementoblast

Question 29

PDL ranges between

Answer 29

.15 mm to .38, decreases with age

Question 30

PDL is primarily

Answer 30

collagen fibers( I, III, XII)

Question 31

individual fibers can or cannot be remodeled while the overall bundle isnot changed

Answer 31

can

Question 32

main elastic fiber of PDL is

Answer 32

oxytalan

Question 33

Alveolar crest group

Answer 33

attach just at the CEJ and run outward to attach into the alveoar socket rim

Question 34

Horizontal Group

Answer 34

run from cementum at right angle to the tooth into the alveolar socket

Question 35

oblique group

Answer 35

most numerous, run atoblique from cementum most of the way down the root

Question 36

apical group

Answer 36

from root apex to the underlying bone

Question 37

interradicular group

Answer 37

only on multi-root teeth, attach to the interradicular spetum

Question 38

dentogingival group

Answer 38

most numerous, runs from cervical cementum to lamina propria

Question 39

alveologingival group

Answer 39

run from alveolar crest (bone) to lamina propia of free/attach gingivae

Question 40

circular group

Answer 40

circular band around neck of the tooth, attaches to other fiber and free gingiva

Question 41

dentoperiosteal group

Answer 41

run apically from cementum to the periosteum of the outer cortical plate

Question 42

transeptal fibers

Answer 42

run from cementum justunder the junctional epithelium, over the alveolar crest and into the cementum of an adjacent tooth. sig cause of orthodontic relapse