Materials profile

Question 1

criteria for selecting a materials

Answer 1

analysis of material
consideration of the requirements
consideration of available materials and properties
choice of material

Question 2

materials

Answer 2

metals
glasses
ceramics
plastics/polymers
composites

Question 3

metal properties

Answer 3

strong
malleauble
conduct heat and electric
shiny

Question 4

glassess properteis

Answer 4

transparent
dont conduct heat
can be toughened
brittle

Question 5

ceramics properties

Answer 5

white
brittle
dont condcut

Question 6

dental materiasl

Answer 6

amalgam
alginate
porcelain
glass ionmers

Question 7

amalgam

Answer 7

strong
silver
contains mercury
not sticky

Question 8

alginate

Answer 8

impression taking
sets quickly
moulds to teeth well

Question 9

porcelain

Answer 9

used for crowns
white
strong

Question 10

glass ionomers

Answer 10

temporary fillings
aesthetic
sticky

Question 11

why do we restore teeth

Answer 11

trauma
tooth dacy
tooth loss
revision

Question 12

direct restorative materials

Answer 12

dental amalgam
glass ionomer cements
resin modified glass ionomer cements
resin composites
polyacid modified resin composites

Question 13

properties wanted from a dentist

Answer 13

command set
simple
bulk placement technique
easy to detect recurrent caries
cost

Question 14

properties wanted from patient

Answer 14

safe
restore fill function
aethetic result
function indefinitely
cost

Question 15

indirect restorative material types

Answer 15

removable
-full/partial dentures
fixed
- metal crowns
bridges
inlays
ceramic veneers crowns and inlays
metal ceramic crowns and bridges

Question 16

indirect material requirements

Answer 16

fit for purpose
-(each patient is different
easy to handle, appropriate properties, aesthetics)
clinically efficacious
safe

Question 17

how to know if a material is safe

Answer 17

CE mark

Question 18

safety testing procedures

Answer 18

basic research

clinical research

Question 19

basic research for CE

Answer 19

pre market testing
required by law for testing
exact tests determined by evaluation of risk associated with material and clinical appliation

Question 20

clinical research

Answer 20

post market surveillance

Question 21

what is included in premarket testing

Answer 21

in vitro

in vivo testing

Question 22

invitro testing

Answer 22

cytotoxicity (killing cells)
genotoxocity (damage genes)
oestrogenicity (effect on oestrogen cycle)
microbial test

Question 23

what is the microbial test

Answer 23

how quick does fungus grow on the material

Question 24

in vivo testing

Answer 24

implantation tests in animlas
- looks for systemic toxicity
evaluation of sensitisation and irritation
pulp studies

Question 25

types of adverse reationc

Answer 25

``` toxic reactions irritant contact dermatitis allergic contact dermititus mal lichenoid reactions anaphylactoid reactions contact urticatria intolerance reactions ```

Question 26

what is included within irritant contact dermatitis

Answer 26

acute toxic reaction cumulative insult dermatitis paraesthesia

Question 27

what is oral lichenoid reactions

Answer 27

white spots around the mouth

Question 28

what is the post surveillance for

Answer 28

adverse reaction unit | collects data

Question 29

most common allergens

Answer 29

``` nickel(25%) palladium chromium cobalt stannum ```