QUIZ 3 Periodontium 1 Flashcards Preview

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Flashcards in QUIZ 3 Periodontium 1 Deck (83)
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the periodontal tissues are critical for the tooth to survive ___ over time

cyclical loading


what are the tissues that invest and support the tooth?

the periodontium


what are the 3 components of the periodontium?

  • alveolar process
  • cementum
  • periodontal ligament


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

mesenchyme, HERS, and the dental follicle


what type of joint is the periodontium?

gomphosis: fibrous peg-in-socket joint


the alveolar process is formed by which type of ossification?

intramembranous ossification

mesenchyme direct to bone, no cartilage intermediate


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

8th week


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


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


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

bone, cementum, and dentin


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

  • tooth eruption
  • dental follicle


T or F

the alveolar process is remodeled throughout life

true, as a result of posteruptive movement


T or F

primary teeth and their permanent successors share the same bony crypt


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


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


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)


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

  • cribriform plate
  • lamina dura
  • bundle bone


describe cribriform plate

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


describe the lamina dura

radiographic term: area of PDL attachment


describe bundle bone

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


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


describe the outer alveolar bone proper

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


supporting alveolar bone has what 3 components?

  • cortical plate
  • alveolar crest
  • central spongiosa


describe the cortical plate of supporting alveolar bone

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


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


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


spongiosa is more prevalent in the maxilla or mandible?



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



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


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


name the bone septa indicated by the arrows