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Patient Care 2 > biocompatibility and intermediate restorative materials > Flashcards

biocompatibility and intermediate restorative materials Flashcards

1
Q

does the material affect the environment or does the environment affect the material

A

both

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2
Q

the material must be of benefit to the patient and the patient must be_____

A

safe from any adverse reactions

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3
Q

where can the biological reaction take place

A

either at a local level (injection site) or far removed from the site of contact (systemically)

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4
Q

systemically may not always be ____

A

readily apparent

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5
Q

what are cases where systemically the reaction is not readily apparent

A

dermatological, immune mediated or neural reactions

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6
Q

what is the most common reaction to dental staff

A

hand/facial dermatitis or respiratory symptoms

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7
Q

what are the possible interactions between dental restorative material and the biological environment

A

-postoperative sensitivity
-toxicity
- corrosion
-hypersensitivity/allergy

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8
Q

what is the concern about toxicity

A

nanomaterials. growing concern about their biosecurity and crossing the blood brain barrier and going into the CNS

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9
Q

what can amalgam cause

A

type 4 allergic reaction 24-48 hours after exposure on the oral mucosa

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10
Q

what are the most common allergies

A

metals- specifically nickel and cobalt

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11
Q

what did denture resins show in study

A

mucosal changes, contact stomatitis and burning sensations in the mouth

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12
Q

what can direct contact of mercury with the oral mucosa cause

A

oral lichenoid lesions (OLL)

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13
Q

what is OLL

A

chronic inflammatory lesion on the oral mucosa

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14
Q

what can amalgam tattoo cause

A

mucosal melanoma which is rare but highly aggressive neoplasm

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15
Q

what is nickel’s incidence of allergic reaction

A

-one of the most common causes of allergic contact dermatitis
-produces more allergic reactions than all other metals combined

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16
Q

where is nickel seen in dentistry

A

-several brands of orthodontic wires are made with nickel titanium alloy
-non-precious metal crowns contain high levels of nickel- some as high as 55%

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17
Q

where is titanium found

A

implants

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18
Q

who is responsible for the materials to which a patient will be exposed

A

dental practitioners

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19
Q

what is sargenti paste for root canals made with

A

paraformaldehyde

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20
Q

what can paraformaldehyde cause and where does it travel in the body

A

irreversible damage to connective tissue, bones nerves, chronic infection and pain
- material can travel throughout the body through blood, lymph nodes, adrenal glands, kidney and brain

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21
Q

what material has a positive effect on the pulp and what does it do

A

calcium hydroxide- stimulates tertiary dentin formation

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22
Q

what are intermediate restorative materials

A

materials that are applied to the dentin prior to the placement of the final restoration since a restoration may have an adverse effect on the pulp

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23
Q

what do intermediate restorative materials include

A

cavity varnishes, bases and liners that stay in place permanently

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24
Q

are intermediate restorative materials and temporary restorative materials the same

A

no

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25
Q

what is the role of intermediate restorative materials

A

-protective
-palliative
-or therapeutic

26
Q

what is the goal of intermediate restorative materials

A

protect the pulp from chemical, electrical, thermal

27
Q

what does zinc oxide eugenol do

A

sedative like qualities on hypersensitive pulp and is a good thermal insulator as well

28
Q

what are the benefits of intermediate restorative material

A

-thermal insulator
- excellent abrasion resistance
- good sealing properties
- low solubility
- may be used under cements and restorative materials that do not contain resin components such as amalgams, inlays, onlays

29
Q

should intermediate restorative materials discolor the tooth

A

no

30
Q

intermediate restorative materials should harden____

A

quick enough to allow subsequent insertion of the restoration

31
Q

intermediate restorative materials should withstand ______

A

the condensation of the over laying restoration

32
Q

intermediate restorative materials should be easily _____

A

manipulated

33
Q

what are liners and bases

A

materials placed between dentin and sometimes pulp and the restoration to provide pulpal protection or pulpal response

34
Q

what do protective needs for a restoration vary depending on

A

the extent and location of the preparation and the restorative material to be used

35
Q

the characterisics of the liner or base selected are determined largely by what

A

the purpose it is expected to serve

36
Q

because liners and bases share similar properties/objectives, they are not always____

A

fully distinguishable in all cases but generalizations can be made

37
Q

what are bases

A

thick mix of material which is placed in bulk. used as a dentin replacement to minimize final restorative mateiral

38
Q

what are bases used for

A

to block out undercuts

39
Q

when are liners applied

A

as a thin coating over exposed dentin

40
Q

how thick are liners and what do they promote

A

0.5mm thick and promote the health of the pulp by adhesion or antibacterial action

41
Q

what are liners used for

A

protect the pup

42
Q

what do liners form a strong bond with

A

dentin to prevent fluid movement down the dentinal tubules

43
Q

what do liners release

A

fluoride

44
Q

what is vitrebond

A

a liner/base
- light cure resin modified glass ionomer

45
Q

when can vitrebond be used

A

under composite, amalgam, metal and ceramic restorations

46
Q

when is vitrebond not indicated

A

for direct pulp capping

47
Q

when is vitrebond used as a base

A

if you are placing it in greater than 0.5 mm

48
Q

how much is vitrebond placed

A

in 0.5 mm increments up to 2 mm

49
Q

is vitrebond used more as a base or liner

A

a liner

50
Q

what is calcium hydroxide and what is its pH

A

a liner with a pH of 11-12.5

51
Q

what is the bactericidal activity of calcium hydroxide

A

retains its anti bacterial properties for about 2 months

52
Q

what is calcium hydroxide used for

A

direct and indirect pulp capping

53
Q

what does calcium hydroxide promote

A

formation of tertiary dentin

54
Q

what is Dycal and how is it cured

A

calcium hydroxide liner
- can be self curing or light cured

55
Q

what are varnishes

A

a natural gum (copal), rosin or synthetic resin dissolved in organic solvent

56
Q

what do varnishes do

A

has some antimicrobial and antiviral properties
- easily seeps into open dental tubules
-prevents transfer of heat and cold into the dentin and pulp

57
Q

what do we use instead of varnishes at UMKC

A

vitrebond

58
Q

when are varnishes not to be used and why

A

-under composite restorations because it interferes with the setting reaction
-under glass ionomers because it interferes with fluoride release

59
Q

what is copalite and what is it used for

A

a varnish used as an insultating layer under gold and amalgam restorations

60
Q

what do you use in a shallow tooth prep

A

place nothing, vitrebond or varnish

61
Q

what do you use in a moderate depth prep

A

liners may be placed for thermal protection and pulpal medication along with varnish

62
Q

what do you use in a very deep prep

A

liner may be calcium hydroxide then the base vitrebond or IRM

Patient Care 2 (8 decks)

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