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Management of Dental Caries > Pulpal Protection > Flashcards

Pulpal Protection Flashcards

1
Q

why si there pulpal protection

A

wish to maintain pulpal vitality

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2
Q

what si the formative function of dental pulp

A

produces the dentine that surrounds it

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3
Q

what is the nutritive function of dental pulp

A

nourishes the avascular dentine - non vital teeth brittle

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4
Q

what is the protective function of pulp

A

carries nerves that give dentine sensitivity

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5
Q

what is the reparative function of pulp

A

produces new dentine in relation to physiological wear and unexpected insult such as caries

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6
Q

what is the pulp to be protected form

A

chemical, thermal and galvanic effects

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7
Q

what is a source of chemical attack

A

from restorative materials

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8
Q

how can restorative materials attack pulp

A

acrylic resin - polymeric materials
acids in certain dentine boning agents - cavity close to pulp
residual acid form acifogenic bacteria

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9
Q

using water coolant when prepping for cavity minimise what

A

inflammatory cell activity
following cav prep
cutting gen heat

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10
Q

what does cav prep result in

A

smear layer that occludes tubules

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11
Q

what sit he smear layer constituents

A

bactria from cav
collagen
hydroxyl apetite

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12
Q

what are thefeaturs of an ideal pulpal protector

A

radiopaque
compatible with wide range of restore mats
obtundant

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13
Q

what is obtundant

A

calm soothing effect on dental pulp

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14
Q

what is a cavity varnish

A

polymer in volatile solvent

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15
Q

when do u apply cavity varnish

A

before placing amalgam
solvent evap
residual polymer occludes dentinal tubules
dentinal fluid movement impaired

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16
Q

what is the action of cavity varnish

A

transient short term action

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17
Q

what is the seal o cavity varnish

A

no long lasting coronal seal

18
Q

what is a cavity hydroxide

A

cavity bases
cement
Dycal

19
Q

what are some features of cavity bases

A 
high pH gives beneficial irritancy 
high pH renders bactericidal 
thermal and electrical insulator 
radio opaque 
good restorative
20
Q

what is another cavity base

A

polycarboxylate cements

21
Q

what are some features about polycarboxylate

A

acidic but high MW reduces penetration - mild irritation of pulp
thermal and electrical insulator
strength for condensation
adhesive so coronal seal

22
Q

in poylycarboxylte what does fluoride do

A

render bacteriostatic

23
Q

i polycarboxylte an obtundant material

A

no - no calm soothing effect

24
Q

what is reinforced zinc oxide eugenol

A

cavity base

25
Q

what does reinforced zinc oxide eugenol do

A

beneficial irritancy
bactericidal due to Zn
thermal and electrical insulator
resin reinforce withstand condensation

26
Q

is reinforced Zinc oxide eugenol radio opaque

A

yes and obtundant

27
Q

what is reinforced zinc oxide eugenol incompatible with

A

resin composites
non adhesive
no coronal seal

28
Q

what is zinc phosphate

A

cavity bases

29
Q

what is the ph and MW like for zinc phosphate

A

low pH nd MW of parent acid render them highly irritant

30
Q

what are some other features of zinc phosphate

A 
thermal and electrical insulator 
strength to withstand condensation 
radio opaque 
not obtundant 
non adhesive
31
Q

what is glass polyalkenoate

A

cavity base

chemical or VLC

32
Q

what is the MW of glass polyalkenoate

A

high parent acid renders them mildly irritant

33
Q

what are some additional features of glass polyalkenoate

A

thermal and electrical insulator
bactericidal
adhesive
bacteriostatic

34
Q

what are bonded restorations applied to

A

non adhesive restorations

  • amalgam
  • resin composites
35
Q

what are resin composites used with

A

use acid etch technique for enamel and dentine bonding agent

36
Q

what is used with dental amalgam

A

use vitrebond (sticky glass polyalkenoate) liner, acid etch, rely - x ARC in uncured state then pack amalgam

37
Q

what do bonded restorations do

A

seal the cavity margins preventing ingress of fluids and bacteria and so protect the pulp

38
Q

what is ideal depth of cavity

A

2mm - no lining

39
Q

what do you do if cavity is slightly deeper than ideal

A

dycal - if restored with galass polyalkenoate
then acid etch then dentine bonding agent
anterior composite next

40
Q

if a cavity if grossly deep use

A

dycal and cover with a further layer of vitrebond

41
Q

when placing linings never…

A

extend them fully to cavity periphery

only dentine overlying the pulp that is covered

Management of Dental Caries (5 decks)

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