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BDS2 OSCE > Cons lab > Flashcards

Cons lab Flashcards

1
Q

what is found in an exam pack?

A

(4) mouth mirror, right angled probe, perio probe, college tweezers

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2
Q

what instruments are found in the restorative tray? (9)

A

(9) small excavator, large excavator, small flat plastic, large flat plastic, large flat ended packer, small flat ended packer, half hollenback carver, Ward’s carver, ball ended burnisher

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3
Q

what instruments are found in the cavity margin finishing tray?

A

(3) enamel hatchet, mesial gingival margin trimmer, distal gingival margin trimmer

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4
Q

what rubber dam instruments are found in our instrument kits?

A

anterior clamp, premolar winged clamps, molar winged clamp, molar wingless clamp
rubber dam punch, rubber dam frame (Young’s type), rubber dam forceps

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5
Q

what other tools are found in our instrument packs?

A

Ash SS spatula, Dycal applicator, amalgam carrier, Millers forceps, Sickle scaler H6 and H7, contra angle probe 28/29, tofflemire matrix band holder, Siqveland matrix band holder, glass slab, curved crown scissors, dissecting tweezer, bur block, mandrel, safety specs

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6
Q

what tablets do you add to the phantom head water?

A

ICX tablets - to prevent biofilm build up

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7
Q

does the motor go on the slow or fast handpiece?

A

slow

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8
Q

what cavity prep burs are there?

A

541 diamond, 542 diamond, small round diamond, large round diamond

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9
Q

what are the dimensions of the 541 diamond bur?

A

width 1mm
length 3mm

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10
Q

wny are rubber dams used?

A

to create a controlled operative field

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11
Q

advantages of rubber dam

A

aseptic environment
allows use of caustic intra-canal medicaments
controls saliva
retraction and protection of soft tissues
improves access and provides optimum visibility

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12
Q

what is the basic rubber dam kit?

A

punch, clamp forceps, clamps, rubber dam, frame
scissors, excavator/flat plastic, floss, tweezers, wedgets

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13
Q

what do rubber dam clamps do?

A

hold the rubber dam onto the tooth

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14
Q

difference between winged and wingless dams

A

winged have small projections allowing it to be mounted on dam prior to application. wingless are applied directly to tooth

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15
Q

why do we floss clamps?

A

if the clamp fractures we can retrieve the fragments

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16
Q

methods of dam placement (4)

A

dam stretched over tooth first and then clamp applied
dam attached to winged clamp and applied to tooth together
dam placed over bow of wingless clamp and applied to tooth - then dam stretched over clamp
clamp on first and stretch dam over clamp

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17
Q

where should the bow of the dam be placed?

A

distal surface of tooth

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18
Q

what is Black’s classification of cavities?

A

class I - occlusal edge affected of molars and anteriors
class II - affecting interproximal areas (MOD) of posteriors
class III - interproximal areas of anterior teeth
class IV - interproximal areas and incisal edge of anterior teeth
class V - affecting gingival third of anterior or posterior teeth
class VI - affecting cusp tips
view image!!

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19
Q

what is ICDAS code 0

A

sound tooth, no detectable demineralisation after 5 seconds of air drying

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20
Q

what is ICDAS code 1

A

white spot lesion, visible after prolonged air drying

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21
Q

what is ICDAS code 2

A

distinct visual change in enamel (visible when wet or dry)

22
Q

what is ICDAS code 3

A

established enamel lesion, visible when wet or dry. but no dentine is visible

23
Q

what is ICDAS code 4

A

underlying dark shadow from dentin (with or without enamel breakdown)

24
Q

what is ICDAS code 5

A

distinct cavity with visible dentin

25
what is ICDAS code 6
extensive distinct cavity with visible dentin
26
why do we do fissure sealants?
for deep inaccessible fissures with high localised caries risks
27
process of fissure sealant
air dry well etch for 30-60 seconds wash and dry (should have frosted appearance) use ball-ended instrument to add sealant material in increments light cure for 60 seconds
28
what does PRR stand for?
preventive resin restoration
29
process of PRR
diagnostic etch followed by fissurotomy using 541 etch cavity for 15s apply adhesive, evaporate solvent, light cure remove caries fill with flowable composite, light cure 20s fissure seal and light cure
30
how to get access to an ICDAS class 4 lesion?
541 or pear-shaped diamond fissurotomy bur
31
what tool is used for caries excavation?
rosehead steel burs or hand excavators
32
what does carious dentine feel like and when do you stop excavating?
it is necrotic, soft and removable stop when it is hard and leathery and firm test using probe
33
difference between caries infected, affected and sound dentine?
infected - soft/sticky feel with sharp dental probe affected - both sticky/flaky and scratchy feel sound - scratchy
34
what does affected dentine have the capacity to do?
potential to remineralise, so preserve it
35
how to complete a composite restoration
gain access and remove caries etch for 15s, wash and airdry apply adhesive and light cure fill with bulk-fill flowable composite place fossae and shape the fissures assess occlusion
36
what is the lower 6 fissure pattern?
dryopithicus
37
what should a class 1 cavity prep for composite be like?
uniform depth 1.5mm flat floor follow fissure pattern at least 1mm from marginal ridge (residual thickness) upright internal walls and parallel cavity wide enough to allow examination of fissures and composite placement (not more than 1/3 intercuspal width)
38
what should the approx. dimensions of the class one cavity prep be?
2.0 1.0 3.0 1.5 2.0
39
how many increments of composite should be used?
depends on depth one if cavity is <2mm deep
40
what is temporary dressing made of?
zinc oxide and eugenol (ZOE)
41
how do you make the temporary dressing? what amounts etc?
3 drops of liquid, 2x1 powder mix in increments until stiff non-sticky consistency roll into sausage, mix should cut easily
42
how should you apply amalgam?
press amalgam and mix for 8 seconds press into amalgam carrier and apply pack in increments and overfill burnish amalgam from restoration to tooth using ball ended burnisher shape fishers using burnisher and 1/2 hollenback carver
43
requirements for a MOD amalgam cavity prep
smooth outline - no weak enamel clearly defined margins cervical margins clear of contacts proximal margins clear of contact vertical/undercut occlusally straight box walls that converge >=2mm depth rounded internal line angles box margins meet proximal surface and 90 degrees no damage to adjacent teeth
44
how to pack amalgam for an MOD
boxes first smaller instruments quickly heavy pressure tight against band
45
what extra tool is needed for an MOD restoration?
matrix band
46
what types of matrix bands are there?
Tofflemire or Siqveland
47
what is used to smooth amalgam?
pumice/glycerine mix using rubber cup with light pressure
48
placement technique of siqveland matrix band
latch must be locked into gingivally facing slot pull the occlusal latch mesially occlusally facing slot is always open correct orientation results in an occlusally divergent matrix
49
What are the advantages of amalgam?
Cheaper Easier placement Highly durable Can do subgingival restoration Don’t need moisture control Strong - can fill large cavities
50
What are the advantages of composite?
More aesthetic (More shades than GIC etc) Less invasive (less tooth tissue removal as can bond) No environmental concerns (as with amalgam mercury) Can be placed in thin section Bond very well to enamel Material isn’t affected by temperature or prone to expanding or contracting
51
Disadvantages of amalgam
Mercury levels are safe but some people still concerned More invasive preparation Less aesthetic May expand and contract with temperature exposure, resulting in fractures
52
Disadvantages of composite
Shorter lifespan More costly than amalgams Increased time of placement Good moisture control needed

BDS2 OSCE (15 decks)

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