histology chapter 14.txt

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tigermom23
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histology chapter 14.txt
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2010-05-12 23:58:11
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histo chapt 14
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  1. supporting soft and hard dental tissue between and including parts of the alveolar bone
    peridontium
  2. includes the cementum, alveolar bone, and periodontal ligament
    periodontium
  3. part of the periodontium that attaches the teeth to the alveolar bone by anchoring the periodontal ligament
    cementum
  4. in health, cementum is not clinically visible.
    true
  5. a hard tissue that is thickest at the tooth apex and in the interradicular area and thinnest at the CEJ
    cementum
  6. main component cementum
    calcium hydroxyapatite
  7. Cementum forms after the disintegration of_______
    Hertwig's root sheath
  8. Disperses to cover the root dentjn area
    Cementoblast
  9. The cementoblast undergo____and begin laying down cemetoid
    Cemetogenesis
  10. What is formed because of the apposition of cementum over the dentin
    Dentinocemental junction DCJ
  11. Composition of cementum
    Mineralized fibrous matrix and cells
  12. A portion of collagen fibers from the perio ligament...each partially incerted into the outer portion of cement @ 90 degrees
    Sharpey's fibers
  13. Organized to function as a ligament between the tooth and alveolar bone
    Sharpey's fibers
  14. Entrapped cementoblast included in the cells of cementum
    Cementocytes
  15. Each cementocyte lies within this
    Lacuna
  16. The removal of cementum
    Resorption
  17. Results from the removal of cementum by odontoclast
    Reversal lines
  18. When stained...reversal lines appear as a scalloped line
    True
  19. Apposition of cementum is noted by layers of growth aka
    Arrest lines
  20. Reversal and arrest lines are prominent in cementum that has been subjected to trauma
    True
  21. Does cementum continually repair itself like bone does
    No
  22. Calcified bodies of cementum found to the root surface or lying free in the periodontal ligament space
    Cementicles
  23. Symmetricle spheres of cementum attached to the root surface and can be Found near the CEJ
    Cemental spurs
  24. 2 types of cementum formed by cementoblast
    • Acellular
    • Cellular
  25. CONSISTS OF THE FIRST LAYER OF CEMENTUM DEPOSITED AT THE DCJ AND IS ALSO CALLED THE PRIMARY CEMENTUM
    ACELLULAR CEMENTUM
  26. PRIMARY CEMENTUM IS ALSO KNOW AS....
    ACELLULAR CEMENTUM
  27. DOES THE WIDTH OF ACELLULAR CEMENTUM EVER CHANGE
    NO
  28. CONSISTS OF THE LAST LAYER OF CEMENTUM DEPOSITED OVER THE ACELLULAR CEMENTUM
    CELLULAR CEMENTUM
  29. AKA KNOWN AS SECONDARY CEMENTUM
    CELLULAR CEMENTUM
  30. THIS COVERS MAINLY THE APICAL ONE THIRD OF THE ROOT.
    CELLULAR CEMENTUM
  31. CAN THE CELLULAR CEMENTUM CHANGE WIDTHS DURING THE LIFETIME OF THE TOOTH
    YES IT CAN
  32. EXCESSIVE PRODUCTION OF CELLULAR CEMENTUM; MAINLY OCCURS AT THE APEX OF THE TOOTH.
    HYPERCEMENTOSIS
  33. PART OF THE MAXILLA OR MANDIBLE THAT SUPPORTS AND PROTECTS THE TEETH
    ALVEOLAR BONE
  34. MATURE ALVEOLAR BONE IS BY WEIGHT....
    • 60% MINERALIZED (INORGANIC)
    • 25% ORGANIC MATERIAL
    • 15% WATER
  35. NORMAL NATURAL MOVEMENT - ALL THE TEETH MOVE SLIGHTLY TOWARD THE MIDLINE OF THE ORAL CAVITY OVER TIME
    MESIAL DRIFT
  36. PORTION OF BONE THAT IS FOUND APICAL TO THE ROOTS OF THE TEETH
    BASAL BONE
  37. PORTION OF BONE THAT CONTAINS THE ROOTS OF THE TEETH
    ALVEOLAR BONE, ALVEOLAR PROCESS OR ALVEOLAR RIDGE
  38. THE 2 DIVISION OF THE ALVEOLAR BONE
    • ALVEOLAR BONE PROPER
    • SUPPORTING ALVEOLAR BONE
  39. COMPONENTS OF THE ALVEOLAR BONE PROPER AND THE SUPPORTING ALVEOLAR BONE
    • FIBERS
    • CELLS
    • INTERCELLULAR SUBSTANCES
    • NERVES
    • BLOOD VESSELS
    • AND LYMPHATICS
  40. LINING OF THE TOOTH SOCKET
    ALVEOLAR BONE PROPER
  41. TOOTH SOCKET
    ALVEOLUS
  42. ALVEOLAR BONE PROPER
    CRIBRIFORM PLATE
  43. CONTAINS VOLKMANN'S CANALS
    CRIBRIFORM PLATE/ALVEOLAR BONE PROCESS
  44. ALSO CALLED BUNDLE BONE
    ALVEOLAR BONE PROPER
  45. WHEY IS THE THE ALVEOLAR BONE PROPER ALSO CALLED THE BUNDLE BONE
    BECAUSE SHARPEY'S FIBERS ARE INSERTED HERE
  46. UNIFORMLY RADIOPAQUE PROTION OF THE ALVEOLAR BONE PROPER
    LAMINA DURA
  47. WHY IS THE LAMINAL DURA IMPORTANT WHEN STUDING THE RADIOGRAPHS
    FOR PATHOLOGICAL LEASIONS
  48. THE MOST CERVICAL RIM OF THE ALVEOLAR BONE PROPER
    ALVEOLAR CREST
  49. the portion of the alveolar crest that is between the teeth seen on an xray is a radiopaque triangle @ the most superior portion of the interdental bone
    true
  50. consist of plates of compact bone on the facial and lingual surfaces of alveolar bone
    cortical bone or cortical plate
  51. cancellous bone located between the alveolar bone proper and the plates of cortical bone
    trabecular bone
  52. alveolar bone between 2 neighboring teeth
    interdental septum or interdental bone
  53. alveolar bone between the roots of the sam tooth
    interradicular septum
  54. made up of both alveolar bone proper and trabecular bone
    interradicular bone/septum
  55. only a portion of this bone/septum can be seen on a bwx
    interradicular septum/bone
  56. easily seen on both pa's and bwx
    interdental bone/septum
  57. consists of the compact bone of the alveolar bone proper and cancellous bone of the trabecular bone
    interdental septum/bone
  58. maxilla and madible are developed from tissue of which branchial arch
    first branchial arch
  59. the maxilla forms within the ______
    maxillary process
  60. the mandible forms from within the _________________--
    fused mandibular processes of the mandibular arch
  61. both jaw bones begin as small centers of ______________-
    intramembranous ossification
  62. the intramembranous ossification is located where
    around the stomodeum
  63. maxilla's primary center apperars around which week of prenatal development
    7th
  64. where is the maxilla center located
    at the termination of the infraorbital nerve - superior to the dental lamina of the primary max. canine tooth
  65. during which week does the mandible begin to develop
    6th week
  66. week the first bone tissue in the body of the mandible forms
    7th
  67. developmental disturbance with the alveolar bone in which tooth germs are congenitally absent - also affects the devlopment of the alveolar process.
    anodontia
  68. part of the periodontium that provides attachment of the teeth to the surrounding bone
    periodontal ligament (PDL)
  69. appears on xrays as a radiolucent area between the lamina dura(opaque) and the cementum(opaque)
    periodontal space
  70. organized fibrous connective tissue that maintains the gingiva's proper relationship to the teeth
    PDL
  71. transmits occlusal forces from the teeth to the bone-acting as a shock absorber for the soft tissues around the teeth
    PDL
  72. two types of nerves found within the PDL
    • afferent/sensory
    • autonomic sympathetic (regulates blood vessels)
  73. the nerve supply, lymphatics and vascular supply of the PDL enters the tooth @ _____________
    the apical foramen
  74. the tissues of the PDL supply the pulp
    true
  75. componets of the PDL
    intercellular substance, cells and fibers
  76. is the PDL a connective tissue
    yes
  77. most common cell in the PDL
    fibroblast
  78. present in the PDL @ the periphery of the alveolar bone proper
    Osteoblasts
  79. the PDL has osteoclast as well as odontoclasts
    true
  80. present in the mature PDL after disintegration of Hertwig's epithelial root sheath
    epithelial rests of Malassez
  81. can become cystic usually forming nondiagnostic, radiolucent apical leasions-can usually be seen on radiographs
    epithelial rests of Malassez
  82. can the eptihelial rests of Malassez reoccur after surgical removal
    yes
  83. used in the treatment of bone loss and disorganization of the PDL caused by perio disease-increases bone levels and strengthen the PDL
    GTR-guided tissue regeneration
  84. most of the fibers in the PDL - organized groups according to their orientation to the marure tooth-resembles spliced ropes
    principal fibers
  85. distribute forces due to speech, mastication.etc...protecting the soft tissue and allowing some give
    primary fibers of the PDL
  86. main principal fiber group of the PDL
    alveolodental ligament
  87. 5 fiber groups of the alveolodental ligament - on multirooted teeth
    • alveolar crest
    • horizontal
    • oblique
    • apical
    • interradicular
  88. overall function of the alveolodental ligament
    to resist rotational forces or twisting of the tooth within the socket
  89. originates in the alveolar crest of the aloveolar bone proper - fans out to insert into the cervical cementum
    alveolar crest group
  90. helps to resist tilting, intrusive, extrusive and rotational forces
    alveolar crest group
  91. originates in the alveolar bone proper-apical to its alveolar crest - inserts into the cementum horizontally
    horizontal group
  92. function is to resist tilting froces which work to force the tooth to tip either mesial, distal, ligual, or facial - resist rotational forces
    horizontal group
  93. most numerous of the fiber goup - covers the apical two thirds of the root - originates i the alveolar bone proper and extends apically to insert into the cementum in an oblique manner
    oblique group
  94. resist intrusive forces- these try to push the tooth inward as well as rotational forces
    oblique groups
  95. radiate from the apical region of the cementum - inserts into the surrounding alveolar bone proper
    apical group
  96. resists extrusive forces-tries to pull the tooth outward and retational forces
    apical group
  97. found only on multirooted teeth-inserted on the cementum of one root to the cementum of the other root-superficial to the interradicular septum- no bony attachment
    interradicular group
  98. works with the alveolar crest and apical groups-resist intrusive extrusive tilting and rotational forces
    interradicular group
  99. inserts mesiodistal or interdental into the cervical cementum of neighboring teeth
    interdental ligament
  100. travels from cementum to cementum without any bony attachment
    interdental ligament
  101. function: resist rotational forces thus hold the teeth in interproximal contact
    interdental ligament
  102. found within the lamina propria of the marginal gingival-separate but adjacent fiber groups
    gingival fiber groups
  103. support only the marginal gingival tissues to maintain their relation to the tooth
    gingival fiber group
  104. occlusal trauma does not cause periondontal disease-but it can cause acceleration in its progression
    true
  105. remains the longest despite the previous destruction of the ligament
    interdental ligament
  106. congenitally missing teeth
    anodontia
  107. provides for the attachment of the teeth to the surrounding bone
    PDL
  108. the PDL appears as a ____ ____ of .4 to 1.5mm on an xray
    periodontal space
  109. most common cell in the PDL
    fibroblast
  110. present in the PDL at the periphery of the alveolar bone proper
    osteoblasts
  111. can become cystic-usually forms nondiagnostic radiolucent apical leasions
    epithelial rests of Malassez
  112. first branchial arch cartilage
    Meckel's cartilage
  113. what week does the first bone tissue in the bondy of the mandible form
    7th

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