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PERIODONTIUM
100問 • 1年前
  • Tameyra Stefani Al-Suhairy
    • 通報

    問題一覧

  • 1

    connective tissue structure with its stratified squamous epith.

    Periodontium

  • 2

    attaches the teeth to the maxilla and mandible.

    Periodontium

  • 3

    provides a continually adapting structure for the support of the teeth during functions.

    Periodontium

  • 4

    2 mineralized CT of Periodontium

    Cementum and alveolar bone, Fibrous Connective Tissue, perfodontal ligament and lamina propia.

  • 5

    Periodontium forms a specialized fibrous joint called

    Gomphosis

  • 6

    Periodontium DIVIDED INTO 2 based on function

    Gingival Unit, Attachment Apparatus

  • 7

    consisting of free gingiva and alveolar mucosa

    Gingival Unit

  • 8

    4 tissues of periodontium

    Cementum, PDL, Alveolar bone, gingiva

  • 9

    cementum, periodontal ligament and alveolar process

    attachment apparatus

  • 10

    the tooth root is attached to the alveolus (bony socket) by periodontal ligament.

    attachment apparatus

  • 11

    -hard tissue with a calcified intercellular substance covering the anatomical roots of Teeth

    cementum

  • 12

    this ligament is a complex, soft CT containing numerous cell, blood vessel, nerve fibers and ground substance.

    PDL

  • 13

    -Thin of compact bone with many openings. -part of the maxilla and mandible - Supports the sockets

    alveolar process

  • 14

    inner wall of bony socket. consists of thin lamella of bone that surround the root of the tooth and gives attachment to Sharpey's Fibers.

    alveolar bone proper

  • 15

    Which surrounds the alveolar bone proper and support the socket.

    supporting alveolar bone

  • 16

    is a hard avascular connective tissue that covers the roots of teeth

    cementum

  • 17

    thin layer of hard dental tissue covering the anatomic roots of teeth formed by cells known as cementoblasts, which develop from undifferentiated mesen-chymal cells in the connective tissue of the dental follicle.

    cementum

  • 18

    light yellow and slightly lighter in color than dentin. avascular highest fluoride content of all mineralized tissues

    cementum

  • 19

    formed continuously throughout life because as the superficial layer of cementum ages, a new layer of cementum is deposited to keep the attachment intact.

    cementum

  • 20

    dull surface more permeable than other dental tissues softness and the thinness at the cervical portion

    cementum

  • 21

    thickest in the apex and inter-radicular areas of multirooted teeth

    cementum

  • 22

    cementum 10 to 15 um in the

    cervical areas

  • 23

    cementum 50 to 200 um (can exceed > 600um)

    apically

  • 24

    organic matter + water percentage cementum collagen polysaccharides

    50-55%

  • 25

    inorganic or mineral content hyddroxyapatite crystals cementum percentage

    45-50%

  • 26

    cells in the cementum

    cementocytes

  • 27

    Cells of cementum that are embedded in the calcified matrix within cementum doesnt have the capbility to form cementum

    cementocytes

  • 28

    formative cells of cementum in the surface of cementum

    cementoblast

  • 29

    cementocytes shrink and stay in

    lacunae

  • 30

    process of forming cementum happends during root development stage of tooth

    cementogenesis

  • 31

    2 steps in forming cementum

    matrix formation, mineralization

  • 32

    Embryonically, cells are derived from the dental sac or follicle (from ectomesenchyme)

    cementoblast

  • 33

    UMC from PDL may Differentiate into

    cementoblasts

  • 34

    (Extension of the inner and outer dental Epithelium) forms and grows apically

    Hertwig's epithelial root sheath (HERS)

  • 35

    sends inductive signal to ectomesen-chymal pulp cells to secrete predentin by differentiating into odontoblasts. Root dentin forms.

    HERS

  • 36

    Hyaline layer of Hopewell-Smith also known as

    intermediate cementum

  • 37

    not formed by cementoblast, but he rtwigs epithelial rooth sheath

    Hyaline layer of Hopewell-Smith (Intermediate Cementum)

  • 38

    cementoblast came from

    dental sac or dental follicle

  • 39

    uncalcified matrix of cementum lined by cementoblast is called

    cementoid

  • 40

    Connective tissue fibers from the PDL are embedded in the cementum and serve to attach tooth to surrounding bone (Bone bundle) arwe called

    sharpeys fibers

  • 41

    collagenous principal fibers of the periodontal ligament embedded in both cementum and alveolar bone to attach the tooth to alveolus.

    sharpeys fibers

  • 42

    Organic portion of cementum composed of

    collagen, matrix

  • 43

    When thin layer of cementoid is formed, mineral salts from the tissue fluid of PDL is deposited as HA crystals along the collagen fibers.

    Organic portion of cementum composed of

  • 44

    Proteins - Ground substance - Water - Non-collagenous proteins Produced by cementoblasts or fibroblasts

    matrix formation

  • 45

    incremental lines of salter are

    hypermineralized

  • 46

    cementum They are hypermineralized area with less collagen fibers and more ground substance

    Incremental Lines Of Salter

  • 47

    roles of cementum 4

    covers and protects the root dentin (covers the opening of dentinal tubules), provides attachment of the periodontal fibers, reverses tooth resorption, Compensates for tooth attrition

  • 48

    living tissue that does not incorporate cells into its structure and usually predominates on the coronal half of the root

    Acellular layer of cementum

  • 49

    contains cementoblasts (inside the lacuna) and is often formed on the apical half.

    Acellular layer of cementum

  • 50

    (primary cementum)

    acellular

  • 51

    (secondary cementum)

    Cellular Cementum

  • 52

    Represents cementum that is formed before the tooth is established in occlusiom

    Primary Cementum

  • 53

    Represents all the cementum that is formed after the tooth comes in occlusion. • Continuously forms all through out life.

    Secondary Cementum

  • 54

    Cementum is more resistant to resorption: Important in permitting orthodontic tooth movement

    true

  • 55

    3 classification of cementum

    Presence or absence of cells, Origin of collagenous fibers of the matrix, Prefunctional and functional

  • 56

    cementum Collagen fibers of Organic matrix is derived form 2 sources:

    Periodontal ligament (Sharpey's fibers), Cementoblasts

  • 57

    derived from PDL. same direction of the PDL principal fibers i.e. perpendicular or oblique to the root surface

    Extrinsic fibers

  • 58

    derived from cementoblasts. Run parallel to the root surface and at right angles to the extrinsic fibers

    Intrinsic fibers

  • 59

    The area where both extrinsic and intrinsic fibers is called

    mixed fiber cementum

  • 60

    • First cementum • Primary cementum • Acellular • Before PDL forms • Cementoblasts • 15-20um

    Primary acellular intrinsic fiber

  • 61

    Located in cervical half of the root and constitutes the bulk of cementum

    Acellular Extrinsic Fiber Cementum (AEFC-Primary Cementum)

  • 62

    • Covers 2/3rds of root corresponding with the distribution of primary acellular cementum • Principal tissue of attachment • Function in anchoring of tooth • Fibers are well mineralized

    Acellular Extrinsic Fiber Cementum (AEFC-Primary Cementum)

  • 63

    cervical enamel • Forms the coronal cementum

    Acellular afibrillar

  • 64

    extrinsic fibers coming from

    sharpeys fibers

  • 65

    Cementum that normally fills the resorption lacunae • Contains cementoblasts and collagen fbers produced by cementoblasts.

    Cellular Intrinsic fiber cementum

  • 66

    Cementum that is found at the apical third of the root, apices and furcation areas of multi-rooted teeth.

    Cellular Mixed fiber cementum

  • 67

    It contains cellular components and collagen fibers derived from cementoblasts and PDL

    Cellular Mixed fiber cementum

  • 68

    Cementum overlaps enamel

    60%

  • 69

    Cementum just meets enamel

    30%

  • 70

    Small gap between cementum and enamel

    10%

  • 71

    4 signs of aging cementum

    Smooth surface becomes irregular due to calcification of ligament fiber bundles, Continues deposition of cementum occurs with age in the apical area., Cementum resorption. reversal lines, Resorption of root dentin occurs with aging which is covered by cemental repair

  • 72

    Calcified ovoid or round nodule found in the PDL • Single or multiple near the cemental surface • Free in ligament; attached or embedded in cementum • Aging and at sites of trauma

    cementicles

  • 73

    occurs at or apical to the CEJ.

    roor caries

  • 74

    soft, progressive lesion that is found anywhere on the root surface that has lost its connective tissue attachment and is exposed to the environment.

    root caries

  • 75

    Demineralisation is approximately twice as rapid on root surfaces as on enamel

    root caries

  • 76

    most common reasons for root caries occurrence is

    gingival recession

  • 77

    apical migration of marginal gingiva

    gingival recession

  • 78

    FORMATION AND PROGRESSION OF DENTAL CARIES increased risk for root caries among individuals with 3 reasons

    exposed root surfaces, gingival attachment loss, deep pocket probing depths.

  • 79

    Soft, specialized connective tissue situated between cementum and the alveolar bone lining the socket.

    PDL

  • 80

    bacterial organism that cause dental caries in ENAMEL

    strepto mutans

  • 81

    bacterial organism that cause dental caries in DENTIN

    lactobacilli

  • 82

    bacterial organism that cause dental caries in ROOT

    actinomyces

  • 83

    It is a hard avascular connective tissue that covers the roots of teeth

    PDL

  • 84

    5 FUNCTIONS OF PDL

    Supports teeth in their sockets at the same time permitting them to withstand considerable forces of mastication., formative, nutritive, sensory, regulation of pdl width

  • 85

    resorptive cells of pdl

    osteoplasts

  • 86

    intercellular substances of pdl

    fibers, ground substances, blood vessels nerves and lymphatics

  • 87

    one component of PDL you dont see in other structure

    epithelial cells

  • 88

    epithelial cells of pdl

    remnants of the epithelial root sheath of Hertwig

  • 89

    2 kinds of PDL fibers

    Gingival fibers, Alveolodental fibers

  • 90

    PDL help attached gingiva tp the tooth

    Gingival ligaments

  • 91

    attached to the cementum to the lamina propria

    dentogingival fibers

  • 92

    originate from the tip of alveolar bone to the lamina propria

    alveologingival group

  • 93

    fibers that goes around the tooth on the cervical region forms a band help bind gingiva to prevent from getting freeid out of tooth

    circular group

  • 94

    originate from cementum pass beyond tip of alveolar bone to insert into periostium of alevolar bone

    Dentoperiosteal group

  • 95

    only type of fiber attached from one tooth to another tooth in the gingival region attached to two teeth

    transseptal fibers

  • 96

    one end attached to the bone and one to cementum

    alveolodental ligament

  • 97

    From cementum goes downward Attached to the tip of alveolar bone neck region

    alveolar crest group

  • 98

    Perpendicular or at right angle of the long axis of tooth

    horizontal group

  • 99

    Main and most numerous alveolodental ligament Attachment on the bone is higher than to other tooth Mana support during mastication

    Oblique group

  • 100

    Fan shape orientation of fibers at the tip of the root radiate on the apical region of root

    apical group

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    問題一覧

  • 1

    connective tissue structure with its stratified squamous epith.

    Periodontium

  • 2

    attaches the teeth to the maxilla and mandible.

    Periodontium

  • 3

    provides a continually adapting structure for the support of the teeth during functions.

    Periodontium

  • 4

    2 mineralized CT of Periodontium

    Cementum and alveolar bone, Fibrous Connective Tissue, perfodontal ligament and lamina propia.

  • 5

    Periodontium forms a specialized fibrous joint called

    Gomphosis

  • 6

    Periodontium DIVIDED INTO 2 based on function

    Gingival Unit, Attachment Apparatus

  • 7

    consisting of free gingiva and alveolar mucosa

    Gingival Unit

  • 8

    4 tissues of periodontium

    Cementum, PDL, Alveolar bone, gingiva

  • 9

    cementum, periodontal ligament and alveolar process

    attachment apparatus

  • 10

    the tooth root is attached to the alveolus (bony socket) by periodontal ligament.

    attachment apparatus

  • 11

    -hard tissue with a calcified intercellular substance covering the anatomical roots of Teeth

    cementum

  • 12

    this ligament is a complex, soft CT containing numerous cell, blood vessel, nerve fibers and ground substance.

    PDL

  • 13

    -Thin of compact bone with many openings. -part of the maxilla and mandible - Supports the sockets

    alveolar process

  • 14

    inner wall of bony socket. consists of thin lamella of bone that surround the root of the tooth and gives attachment to Sharpey's Fibers.

    alveolar bone proper

  • 15

    Which surrounds the alveolar bone proper and support the socket.

    supporting alveolar bone

  • 16

    is a hard avascular connective tissue that covers the roots of teeth

    cementum

  • 17

    thin layer of hard dental tissue covering the anatomic roots of teeth formed by cells known as cementoblasts, which develop from undifferentiated mesen-chymal cells in the connective tissue of the dental follicle.

    cementum

  • 18

    light yellow and slightly lighter in color than dentin. avascular highest fluoride content of all mineralized tissues

    cementum

  • 19

    formed continuously throughout life because as the superficial layer of cementum ages, a new layer of cementum is deposited to keep the attachment intact.

    cementum

  • 20

    dull surface more permeable than other dental tissues softness and the thinness at the cervical portion

    cementum

  • 21

    thickest in the apex and inter-radicular areas of multirooted teeth

    cementum

  • 22

    cementum 10 to 15 um in the

    cervical areas

  • 23

    cementum 50 to 200 um (can exceed > 600um)

    apically

  • 24

    organic matter + water percentage cementum collagen polysaccharides

    50-55%

  • 25

    inorganic or mineral content hyddroxyapatite crystals cementum percentage

    45-50%

  • 26

    cells in the cementum

    cementocytes

  • 27

    Cells of cementum that are embedded in the calcified matrix within cementum doesnt have the capbility to form cementum

    cementocytes

  • 28

    formative cells of cementum in the surface of cementum

    cementoblast

  • 29

    cementocytes shrink and stay in

    lacunae

  • 30

    process of forming cementum happends during root development stage of tooth

    cementogenesis

  • 31

    2 steps in forming cementum

    matrix formation, mineralization

  • 32

    Embryonically, cells are derived from the dental sac or follicle (from ectomesenchyme)

    cementoblast

  • 33

    UMC from PDL may Differentiate into

    cementoblasts

  • 34

    (Extension of the inner and outer dental Epithelium) forms and grows apically

    Hertwig's epithelial root sheath (HERS)

  • 35

    sends inductive signal to ectomesen-chymal pulp cells to secrete predentin by differentiating into odontoblasts. Root dentin forms.

    HERS

  • 36

    Hyaline layer of Hopewell-Smith also known as

    intermediate cementum

  • 37

    not formed by cementoblast, but he rtwigs epithelial rooth sheath

    Hyaline layer of Hopewell-Smith (Intermediate Cementum)

  • 38

    cementoblast came from

    dental sac or dental follicle

  • 39

    uncalcified matrix of cementum lined by cementoblast is called

    cementoid

  • 40

    Connective tissue fibers from the PDL are embedded in the cementum and serve to attach tooth to surrounding bone (Bone bundle) arwe called

    sharpeys fibers

  • 41

    collagenous principal fibers of the periodontal ligament embedded in both cementum and alveolar bone to attach the tooth to alveolus.

    sharpeys fibers

  • 42

    Organic portion of cementum composed of

    collagen, matrix

  • 43

    When thin layer of cementoid is formed, mineral salts from the tissue fluid of PDL is deposited as HA crystals along the collagen fibers.

    Organic portion of cementum composed of

  • 44

    Proteins - Ground substance - Water - Non-collagenous proteins Produced by cementoblasts or fibroblasts

    matrix formation

  • 45

    incremental lines of salter are

    hypermineralized

  • 46

    cementum They are hypermineralized area with less collagen fibers and more ground substance

    Incremental Lines Of Salter

  • 47

    roles of cementum 4

    covers and protects the root dentin (covers the opening of dentinal tubules), provides attachment of the periodontal fibers, reverses tooth resorption, Compensates for tooth attrition

  • 48

    living tissue that does not incorporate cells into its structure and usually predominates on the coronal half of the root

    Acellular layer of cementum

  • 49

    contains cementoblasts (inside the lacuna) and is often formed on the apical half.

    Acellular layer of cementum

  • 50

    (primary cementum)

    acellular

  • 51

    (secondary cementum)

    Cellular Cementum

  • 52

    Represents cementum that is formed before the tooth is established in occlusiom

    Primary Cementum

  • 53

    Represents all the cementum that is formed after the tooth comes in occlusion. • Continuously forms all through out life.

    Secondary Cementum

  • 54

    Cementum is more resistant to resorption: Important in permitting orthodontic tooth movement

    true

  • 55

    3 classification of cementum

    Presence or absence of cells, Origin of collagenous fibers of the matrix, Prefunctional and functional

  • 56

    cementum Collagen fibers of Organic matrix is derived form 2 sources:

    Periodontal ligament (Sharpey's fibers), Cementoblasts

  • 57

    derived from PDL. same direction of the PDL principal fibers i.e. perpendicular or oblique to the root surface

    Extrinsic fibers

  • 58

    derived from cementoblasts. Run parallel to the root surface and at right angles to the extrinsic fibers

    Intrinsic fibers

  • 59

    The area where both extrinsic and intrinsic fibers is called

    mixed fiber cementum

  • 60

    • First cementum • Primary cementum • Acellular • Before PDL forms • Cementoblasts • 15-20um

    Primary acellular intrinsic fiber

  • 61

    Located in cervical half of the root and constitutes the bulk of cementum

    Acellular Extrinsic Fiber Cementum (AEFC-Primary Cementum)

  • 62

    • Covers 2/3rds of root corresponding with the distribution of primary acellular cementum • Principal tissue of attachment • Function in anchoring of tooth • Fibers are well mineralized

    Acellular Extrinsic Fiber Cementum (AEFC-Primary Cementum)

  • 63

    cervical enamel • Forms the coronal cementum

    Acellular afibrillar

  • 64

    extrinsic fibers coming from

    sharpeys fibers

  • 65

    Cementum that normally fills the resorption lacunae • Contains cementoblasts and collagen fbers produced by cementoblasts.

    Cellular Intrinsic fiber cementum

  • 66

    Cementum that is found at the apical third of the root, apices and furcation areas of multi-rooted teeth.

    Cellular Mixed fiber cementum

  • 67

    It contains cellular components and collagen fibers derived from cementoblasts and PDL

    Cellular Mixed fiber cementum

  • 68

    Cementum overlaps enamel

    60%

  • 69

    Cementum just meets enamel

    30%

  • 70

    Small gap between cementum and enamel

    10%

  • 71

    4 signs of aging cementum

    Smooth surface becomes irregular due to calcification of ligament fiber bundles, Continues deposition of cementum occurs with age in the apical area., Cementum resorption. reversal lines, Resorption of root dentin occurs with aging which is covered by cemental repair

  • 72

    Calcified ovoid or round nodule found in the PDL • Single or multiple near the cemental surface • Free in ligament; attached or embedded in cementum • Aging and at sites of trauma

    cementicles

  • 73

    occurs at or apical to the CEJ.

    roor caries

  • 74

    soft, progressive lesion that is found anywhere on the root surface that has lost its connective tissue attachment and is exposed to the environment.

    root caries

  • 75

    Demineralisation is approximately twice as rapid on root surfaces as on enamel

    root caries

  • 76

    most common reasons for root caries occurrence is

    gingival recession

  • 77

    apical migration of marginal gingiva

    gingival recession

  • 78

    FORMATION AND PROGRESSION OF DENTAL CARIES increased risk for root caries among individuals with 3 reasons

    exposed root surfaces, gingival attachment loss, deep pocket probing depths.

  • 79

    Soft, specialized connective tissue situated between cementum and the alveolar bone lining the socket.

    PDL

  • 80

    bacterial organism that cause dental caries in ENAMEL

    strepto mutans

  • 81

    bacterial organism that cause dental caries in DENTIN

    lactobacilli

  • 82

    bacterial organism that cause dental caries in ROOT

    actinomyces

  • 83

    It is a hard avascular connective tissue that covers the roots of teeth

    PDL

  • 84

    5 FUNCTIONS OF PDL

    Supports teeth in their sockets at the same time permitting them to withstand considerable forces of mastication., formative, nutritive, sensory, regulation of pdl width

  • 85

    resorptive cells of pdl

    osteoplasts

  • 86

    intercellular substances of pdl

    fibers, ground substances, blood vessels nerves and lymphatics

  • 87

    one component of PDL you dont see in other structure

    epithelial cells

  • 88

    epithelial cells of pdl

    remnants of the epithelial root sheath of Hertwig

  • 89

    2 kinds of PDL fibers

    Gingival fibers, Alveolodental fibers

  • 90

    PDL help attached gingiva tp the tooth

    Gingival ligaments

  • 91

    attached to the cementum to the lamina propria

    dentogingival fibers

  • 92

    originate from the tip of alveolar bone to the lamina propria

    alveologingival group

  • 93

    fibers that goes around the tooth on the cervical region forms a band help bind gingiva to prevent from getting freeid out of tooth

    circular group

  • 94

    originate from cementum pass beyond tip of alveolar bone to insert into periostium of alevolar bone

    Dentoperiosteal group

  • 95

    only type of fiber attached from one tooth to another tooth in the gingival region attached to two teeth

    transseptal fibers

  • 96

    one end attached to the bone and one to cementum

    alveolodental ligament

  • 97

    From cementum goes downward Attached to the tip of alveolar bone neck region

    alveolar crest group

  • 98

    Perpendicular or at right angle of the long axis of tooth

    horizontal group

  • 99

    Main and most numerous alveolodental ligament Attachment on the bone is higher than to other tooth Mana support during mastication

    Oblique group

  • 100

    Fan shape orientation of fibers at the tip of the root radiate on the apical region of root

    apical group