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BDS1 BAMS oral biology > dentine and pulp > Flashcards

dentine and pulp Flashcards

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1
Q

what is dentine?

A

main supporting structure of the tooth found beneath the enamel and cementum

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2
Q

what forms the bulk of the tooth?

A

dentine

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3
Q

what is the only tissue in the body harder than dentine?

A

enamel (dentine has a greater tensile and compression strength)

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4
Q

describe dentine

A
  • it is permeable as it contains tubules
  • it contains cell processes
  • its ivory in colour
  • if enamel is increased, dentine is increased
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5
Q

what is the content of dentine?

A
  • hydroxyapatite 70% weight, 50% volume
  • organic matter 20% weight, 30% volume
  • water 10% weight 20% volume
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6
Q

what surrounds and lines dentine tubules?

A

peritubular dentine

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7
Q

what lies between dentine tubules?

A

intertubular dentine (lower mineral content than peritubular dentine)

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8
Q

what happens to dentine tubules?

A

the lumen narrows overtime

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9
Q

what shape are primary curvature dentine tubules?

A

S shaped

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10
Q

what shape are secondary curvature dentine tubules?

A

wavy

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11
Q

what can dentinal tubules be a pathway for?

A

toxins

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12
Q

what is globular dentine?

A

a result of defficient mileralisation

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13
Q

which cells produce dentine?

A

odontoblasts

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14
Q

what is the content of dentine tubules?

A
  • odontoblast processes (extentions)
  • unmyelinated nerve terminals
  • dendritic cells
  • dentine fluid from pulp
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15
Q

where is dental pulp?

A

in the tooth’s core

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16
Q

what is dental pulp?

A

a connective tissue

17
Q

what does dental pulp contain?

A
  • cells
  • extracellular components
  • nerves
  • blood vessels
    -lymphatics
18
Q

what cells are present in dental pulp?

A
  • ondontoblasts
  • fibroblasts
  • defence cells
19
Q

what are the extracellular components of dental pulp?

A
  • fibres (collagen and oxytalan)
  • matrix (proteoglycans, chondritin SO4 and dermatin SO4)
20
Q

what nerves are present in dental pulp?

A

sensory nerves (sympathetic autonomic nervous system)

21
Q

what are the functions of dental pulp?

A
  • produce dentine
  • nutritive
  • dentine growth/repair
  • defence (immune cells/lymphatics)
  • neural- sensory
22
Q

what is dentogenesis?

A

un-mineralised dentine

BDS1 BAMS oral biology (10 decks)

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