When Prevention Fails

Question 1

when is restoration or extraction required

Answer 1

cavity prep
systematic approach
only recover tooth if sufficient viable tooth substance

Question 2

why are the classifications of caries

Answer 2

1
2
3
4
5

Question 3

what is class 1

Answer 3

occlusal of molar and p molar

buccal pits of molars

Question 4

what is class 2

Answer 4

approximal of molars and p molars

Question 5

what si class 3

Answer 5

approximal surfaces of incisors and canines

Question 6

what is class 4

Answer 6

incised edges of incisors and canines

Question 7

what is class 5

Answer 7

cerical margin

Question 8

what are the principles of cavity prep

Answer 8

convenience form
outline form
resistance
retention form 
treatment of residual caries 
corrections of enamel margins 
cavity debridement

Question 9

what is outline form

Answer 9

defining the shape

Question 10

what is resistance form

Answer 10

ability of cav to resist movement of restorations in it

Question 11

what is retention form

Answer 11

resist forces to displace

parallel sided cavity - no undercuts

Question 12

what is imp about an undercut

Answer 12

restoration will not withdraw

Question 13

what is treatment of residual caries

Answer 13

removal by excavation

Question 14

what is correction of enamel margins

Answer 14

cliff hanging of enamel over restoration - too much = unsupproting can cave

Question 15

how do you correct an enamel margin

Answer 15

remove weakened tooth substance
facilitate placement of matrix retainers
bevel to increase SA for bonding

Question 16

what is bond strength

Answer 16

force to remove divided by SA

Question 17

what tools are used in cavity debridement

Answer 17

triple syringe

aspiration

Question 18

how is residual caries rid of

Answer 18

using large bur as opposed to small as slower, force per unit less off easy
excavator
caries dyes
chemchemical method

Question 19

what is the chemochemical method of ridding of caries

Answer 19

carislov
proteolytic action
reduces need for LA

Question 20

what does carislov contain

Answer 20

active components

• amino acids - leucine, lysine and glutamic acid
• sodium hypochlorite

Question 21

what is stepwise excavation

Answer 21

caries removal dontn expo pulp

Question 22

why use stepwise exaction

Answer 22

cear periphery don’t touch pulp
free cav floor
line CaOH temporary glass ionomer resin

Question 23

how can augment the retention afforded by the cavity design

Answer 23

acid etch

dentine bonding

Question 24

what does acid etch ad dentine bonding reduce the need for

Answer 24

mechanical creation of undercuts for retentive purposes and conserve tooth subs

Question 25

what is used acid etch technique

Answer 25

buonocore

Question 26

what is the way acid etch is done

Answer 26

application of acid gel
decalcification of enamel prisms
micro mechanical tags intowhcih bonding resin may flow

Question 27

why ar dentine pins

Answer 27

used as reinforcement mechanical retention

plunged into dentine via pin channel by sp drill appropriate

Question 28

where are dentine pins placed

Answer 28

placed at corners of tooth

Question 29

when is dentine pins used

Answer 29

used for amalgam where one or more cusp is missing

one pin per cusp

Question 30

what is dentine pin risk of

Answer 30

pulpal exposure
pdl
and today rarely used

Question 31

what is to be considered when choosing a restorative material to be used

Answer 31

amalgam and resin composite non adhesive
adhesive agents
glass polyalkenote is adhesive

Question 32

what is important of conservation of tooth substance

Answer 32

restorations don’t last forever
small is beautiful
preserve oblique ridge in max molars

Question 33

what do u do when preparing cavity

Answer 33

minimise further plural injury
water coolant
aim to maintain pulp cell function and viability
reduce probability of post op complications

Question 34

what needs to be considered as potential damage when restorations are taking place

Answer 34

remaining dentine thickness
cavity morphology - depth, area, volume
restorative material

Question 35

the do u restore

Answer 35

where caries active or aesthetic

Question 36

what kind of caries removed

Answer 36

soft caries

Question 37

for deep penetrating lesions avoid

Answer 37

exposure by stepwise techniques