QUIZ 3 Periodontium 1 Flashcards Preview

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Flashcards in QUIZ 3 Periodontium 1 Deck (83)
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1

the periodontal tissues are critical for the tooth to survive ___ over time

cyclical loading

2

what are the tissues that invest and support the tooth?

the periodontium

3

what are the 3 components of the periodontium?

  • alveolar process
  • cementum
  • periodontal ligament

4

the periodontium develops during a series of complex interactions of ___, ___, and ___

mesenchyme, HERS, and the dental follicle

5

what type of joint is the periodontium?

gomphosis: fibrous peg-in-socket joint

6

the alveolar process is formed by which type of ossification?

intramembranous ossification

mesenchyme direct to bone, no cartilage intermediate

7

formation of the alveolar process occurs during which week of uterine life?

8th week

8

describe the relationship between alveolar processes and tooth germs

  • tooth germs are contained in the horseshoe-shaped grooves of the mandible and maxilla
  • crypts develop around the tooth germs, such that they eventually form the sockest

9

what are the cells involved in the formation of the periodontium?

 

  • osteoblasts - make surrounding alveolar bone
  • cementoblasts - make cementum
  • PDL fibroblasts - make the PDL itself
  • odontoblasts - make the rest of the root
  • *all of these are epithelial derived tissues

10

which 3 of the 4 types of mineralized tissues found in the oral cavity are contained in the periodontium?

bone, cementum, and dentin

11

the alveolar processes develop substantially during ___, under the influence of the ___

  • tooth eruption
  • dental follicle

12

T or F

the alveolar process is remodeled throughout life

true, as a result of posteruptive movement

13

T or F

primary teeth and their permanent successors share the same bony crypt

false:

primary teeth have their own bony crypts, and then permanent teeth develop their own bony crypts as well

14

compare the alveolar bone proper to the supporting alveolar bone

  • alveolar bone proper
    • compact bone
    • cribriform plate, lamina dura
  • supporting alveolar bone
    • both compact AND trabecular bone
    • cortical plates: compact bone component
    • central spongiosa: trabecular bone component

15

label this picture

  • alveolar bone proper is the cortical bone that lines the tooth socket
  • supporting alveolar bone includes the cortical plates (compact bone) and trabecular bone (central spongiosa)

16

the alveolar bone proper is also known as what 3 other things?

  • cribriform plate
  • lamina dura
  • bundle bone

17

describe cribriform plate

anatomical term: cribrum = sieve; has volkmann's canals running through it

18

describe the lamina dura

radiographic term: area of PDL attachment

19

describe bundle bone

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

20

describe the inner alveolar bone proper

  • faces PDL directly
  • remodeling rate may be high due to constant adaptation to tooth movements
  • it primarily consists of woven bone, but lamellar bone is also present
  • smooth surface in young individuals, but becomes rougher with age

21

describe the outer alveolar bone proper

  • faces away from the PDL
  • lamellar bone, continuous with supporting alveolar bone

22

supporting alveolar bone has what 3 components?

  • cortical plate
  • alveolar crest
  • central spongiosa

23

describe the cortical plate of supporting alveolar bone

  • inner - lingual and palatal surface
  • outer - labial and buccal surface

24

describe the alveolar crest of the supporting alveolar bone

  • junction of cortical plate and alveolar bone proper
  • thinner in maxilla, thickest in premolar and molar region of mandible

25

describe the central spongiosa of supporting alveolar bone

  • trabecular (spongy/cancellous) bone supporting alveolar bone proper and cortical plate
  • marrow - red (hemopoeitic) in young, yellow in aged

26

spongiosa is more prevalent in the maxilla or mandible?

maxilla

27

the spongiosa is often ___ in the anterior region of both jaws

absent/diminished

28

what are the 4 functions of the alveolar process?

  1. protection and structure of the socket for the tooth to rest in
  2. attachment of sharpey's fibers of the PDL which are embedded in bone
  3. support of tooth roots, especially facial/lingual
  4. distribution of loading from the tooth and PDL to the surrounding bone

29

describe the two types of bone septa of alveolar processes

  • interradicular septa
    • bony septum between roots of a single tooth
  • interalveolar septa
    • bony septum between adjacent teeth

30

name the bone septa indicated by the arrows