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OSCE > Op Tech > Flashcards

Op Tech Flashcards

1
Q

WHAT ARE CAVITY MARGINS

A

junction between the prepared cavity wall and the external surfaces

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2
Q

WHAT IS THE CAVO SURFACE MARGIN ANGLE

A

the angle created at the point where a prepared cavity wall meets any external wall
should be 90 degrees in amalgam
should be an obtuse angle for composite

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3
Q

WHAT ARE POINT ANGLES

A

the angle formed by the junction of three surfaces

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4
Q

WHAT IS THE OCCLUSAL/PULPAL FLOOR

A

the floor of the cavity which is parallel to the occlusal plane
overlies the pulp

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5
Q

WHAT IS THE GINGIVAL FLOOR

A

the surface which is parallel to the occlusal plane in an interproximal cavity, bound externally by the gingival margin

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6
Q

WHAT IS THE PULPAL AXIAL WALL

A

the wall which is parallel to the long axis of the tooth

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7
Q

WHAT IS THE BUCCAL/LINGUAL AXIAL WALL

A

the wall which is parallel to the long axis of the tooth, bound by the occlusal floor and the cavo-surface margin angle

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8
Q

WHAT IS THE ISTHMUS

A

the least wide part of a key cut proximal-occlusal cavity preparation

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9
Q

WHAT IS A LINE ANGLE

A

where any two walls meet and create a line

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10
Q

WHAT ARE THE 2 CATAGORIES OF HAND INSTRUMENTS

A

cutting (cutting edge)

non-cutting (point)

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11
Q

WHAT ARE THE USES OF A STRAIGHT DENTAL PROBE / DENTAL EXPLORER / SICKLE PROBE

A

caries protection
point focus
surface testing and retraction

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12
Q

WHAT ARE THE FEATURES AND USES OF AN EXCAVATOR

A

spoon/ round
3 sizes

caries excavation
restoration shaping and contouring
material removal/manipulation

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13
Q

WHAT ARE THE USES OF A DENTAL MIRROR

A

intra-oral viewing

soft tissue retraction and protection

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14
Q

WHAT ARE THE USES OF TWEEZERS

A

handling small object

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15
Q

WHAT ARE THE TWO TYPES OF TWEEZERS

A

surgical locking

collage - we use

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16
Q

WHAT ARE THE USES OF A DENTAL CHISEL / HATCHET

A

enamel/cavosurface margin angle finishing

removing unsupported enamel prisms

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17
Q

WHAT ARE THE USES OF A FLAT PLASTIC

A

shaping flowable materials - comp and GI

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18
Q

WHAT ARE THE USES OF A CONDENSOR

A

condensing amalgam

manipulating composite

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19
Q

WHAT ARE THE USES OF A BURNISER

A

finishing amalgam

manipulating composite

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20
Q

WHAT ARE THE USES OF A CARVING ISNTRUMENT

A

carving amalgam

shaping composite

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21
Q

WHAT DOES THE COLOURED BAND ON A BUR INDICATE

A

diamond grit size

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22
Q

WHAT IS A YELLOW BAND ON A BUR

A

extra fine

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23
Q

WHAT IS THE RED BAND ON A BUR

A

fine

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24
Q

WHAT IS A BLU BAND ON A BUR INDICATE

A

standard

25
Q

WHAT DOES WHITE BAND ON A BUR INDICATE

A

super fine

26
Q

WHAT DOES A GREEN BAND ON A BUR INDICATE

A

coarse

27
Q

WHAT DOES A BALCK BAND ON A BUR INDICATE

A

super coarse

28
Q

WHAT IS THE USE OF A MATRIX BAND

A

replacing cavity walls

moisture control

29
Q

WHAT IS THE USE OF WOODEN WEDGES

A

slight tooth separation to improve contact point formation
adapt the matrix band
when interproximal

30
Q

WHAT IS THE COMPOSITE WE MAINLY USE

A

highly filled bis-GMA resin

hybrid

31
Q

WHICH MATERIAL IS UNFILLED BIS-GMA

A

flowable composite

32
Q

IDENTIFYING HAZARDS

A 
bur in handpiece 
unsheathed needle 
blood outside spittoon
instruments in sink 
but box open 
no paper towel on bracket table
messy bracket table 
self curing materials in light 
wrong PPE
over wearing gloves 
puddle 
cement on instruments 
endo files 
overflowing sharps 
tangled tubing 
lid off composite when not in use
33
Q

FORMS OF GIC

A

powder and liquid

Fuji triage capsule

34
Q

WHAT ARE THE USES OF A DENTAL DAM

A 
airway protection
field and chemical isolation
better vision and access
health and safety 
helps patient comfort and management
35
Q

WHAT ARE DENTAL DAM RETAINERS

A

clamp
floss
wedges
widget cord

36
Q

WHAT ARE DENTAL DAM RETAINERS

A

clamp
floss
wedges
widget cord

37
Q

WHAT MATERIAL IS DENTAL DAM

A

nitrile

used to be latex but too much allergy

38
Q

WHAT IS ALL THE DENTAL DAM EQUIPMENT

A 
dam 
frame 
punch 
floss 
widget 
clamp
scissors 
clamp forceps
39
Q

WHY PULL THE FLOSS OUT BUCCALLY WHEN FLOSSING A DAM

A

as you can displace the dam pulling cervically

40
Q

WHAT ARE THE PRINCIPLES OF CAVITY PREPARATION

A

access - enamel caries
extent - remove enamel caries to extent of lesion at ADJ = outline
remove dentinal caries - slow speed from ADJ inwards
remove deep caries over pulp - big slow instrument
modifications - cavo-surface angles
internal design modifications - line / point angles
final seal = smooth, no unsupported tissue, check over

41
Q

WHAT IS THE CONFIGURATION FACTOR

A

the number of bonded surfaces in an adhesive restoration

high = lots of surfaces

42
Q

WHAT IS CONFIGURATION STRESS

A

composite dimensional change
etch/bond stronger than interstitial enamel strength
enamel failure

43
Q

WHY DO WE ETCH

A

to remove the smear layer - exposing dentinal tubules

44
Q

WHY LEAVE SURFACES MOIST AFTER ETCHING

A

over drying dentine can cause post op sensitivity

45
Q

WHY USE FLOWABLE UNDER A RESTORATION

A

mediate contraction stresses on interface

achieve optimal adaption to non load bearing surfaces

46
Q

WHAT LIGHT CURING INTENSITY IS REQUIRED TO CURE 1.5-2MM DEPTH OF COMPOSITE RESIN

A

280-300mW/cm2

47
Q

WHAT ARE THE SAFE TO USE CHECKS FOR HANDPIECES

A

check the coupling is secure
check the bur in secure in the handpiece
backcap cannot rotate

48
Q

WHAT ARE THE FIT FOR USE CHECKS FOR HANDPIECES

A

no lateral movement of the bur
bur spins freely
check consistent sound for 5 seconds

49
Q

HOW TO MIX FUJI

A

i. Open packet and activate capsule by pressing into bench until red portion is depressed into thr capsule
ii. Needs mixed to be activated for 10 seconds in the amalgamator
iii. Place capsule into the dispenser gum
iv. Inject into tooth keeping tip at bottom of cavity and filling until excess
v. Remove excess with flat intrument, remember and clean instrument or it will set
vi. Short working time with this material
vii. 3 setting stages
Now set so use articulation paper to double check occlusion

50
Q

WHAT IS IN PRIME AND BOND

A

Bis-GMA and HEMA resin combined by an initiation system
acetone
camphorquinone

51
Q

WHTA DO TO AFTER APPLIED BOND TO TOOTH

A

leave it for 20 seconds then use air to help dissolve the solvent for 5 seconds

52
Q

WHAT MATERIAL SHOULD BE USED FOR TEMPORARY FILLINGS

A

RMGI

53
Q

WHICH MATERIAL IS USED FOR A DIRECT PULP CAP

A

calcium hydroxide

54
Q

WHICH MATERIAL IS USED AS AN INDIRECT PULP CAP

A

RMGI

when remaining dentine is thin

55
Q

WHY WOULD YOU USE A PULP CAP (LINING)

A

for thermal insulation in amalgam
for the chemical toxicity in unset resin in composite
when pulp is exposed or nearly

56
Q

WHAT FORM IS CALCIUM HYDROXIDE

A

powder and liquid

spatulate

57
Q

HOW DOES THE PULP CAPPING WORK

A

do calcium hydroxide direct pulp cap
set
do RMGI indirect pulp cap

58
Q

WHAT KIND OF CURE IS RMGI

A

Acid base
light cure = dual
Light cure and redox = tri

59
Q

ORDER OF CLEANING DOWN A DENTAL UNIT

A

PPE gloves and apron

  1. Light , head rest
    1. Fabric of chair
    2. Arm rests
    3. Partition between unit
    4. Bracket table handpiece
    5. Motors handpiece
    6. Cables
    7. Housing for handpiece
      1. Spitoon

OSCE (14 decks)

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