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Yr 2 - OSCE & e-assessments > Instrumentation > Flashcards

Instrumentation Flashcards

1
Q

What is the name of the main tray of instruments used in operative dentistry?

A

The cons tray

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2
Q

What is this instrument?

A

A stainless steel single ended number 18 probe

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3
Q

What is this instrument?

A

A stainless steel single ended BPE probe

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4
Q

What is this instrument?

A

A stainless steel single ended williams probe

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5
Q

What is this instrument?

A

A double ended stainless steel brialt probe

= used to explore interproximal restoraion materials and investigate caries

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6
Q

What is this instrument?

A

Stainless steel college tweezers

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7
Q

What is this instrument?

A

Stainless steel double ended 125/126 excavator

= spoon shaped

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8
Q

What is this instrument?

A

Stainless steel double ended 133/4 excavator

= round

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9
Q

What is this instrument?

A

Stainless steel double ended u1/u2 & u3/u4 marginal trimmer

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10
Q

What is this instrument?

A

Stainless steel double ended PF-10

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11
Q

What is this instrument?

A

179 / 156 Flat plastic

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12
Q

What is this instrument?

A

Stainless steel double ended 0/1 amalgam plugger

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13
Q

What is this instrument?

A

Stainless steel double ended half hollenback carver

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14
Q

What is this instrument?

A

Stainless steel double ended wards no. 2 carver

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15
Q

What is this instrument?

A

Stainless steel double ended P1 composite instrument

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16
Q

What is this instrument?

A

Amalgam carrier

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17
Q

What is this instrument?

A

Stainless steel Toffelmire matrix holder

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18
Q

What is this instrument?

A

Stainless steel ssiqveland matrix holder

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19
Q

What is this instrument?

A

Mirror

n.b. can detach mirror and handle

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20
Q

What is this instrument?

A

285 / 773 diamond fast handpiece bur

= rugby ball

Uses:

Occlusal and lingual reduction & shaping of cingulum and cusp areas

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21
Q

What is this instrument?

A

520 diamond fast handpiece bur

= 0.8mm rosehead

Uses:

Class III (interproximal caries on anterior teeth)

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22
Q

What is this instrument?

A

544 diamond fast handpiece bur

= 3mm length & 1 mm at tip

= short domed cylinder

Uses:
access to carries (occlusal)

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23
Q

What is this instrument?

A

554 diamond fast handpiece bur

= tapered (non-undercut) with flat end

Uses:

Cuspal reduction, bevel cusps, crown prep/bridge

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24
Q

What is this instrument?

A

555 diamond fast handpiece bur

= longer version of 554

25
Q

What is this instrument?

A

D & Z diamond fast handpiece bur

= tapered

Uses:

Interproximal crown prep (very narrow)

26
Q

What is this instrument?

A

701 stainless steel slow handpiece bur

= tapered and cross cut

Uses:

Smoothing

27
Q

What is this instrument?

A

Stainless steel round slow handpiece bur

= Sizes: 1, 3 & 5mm

Uses:

Caries removal (use even bigger size with lots of caries)

Retention for amalgam in dentine (smaller ones & use with caution)

28
Q

What is this instrument?

A

Green stone slow handpiece bur

= Carborundum = more abrasive than white sone

N.b. Different shapes and sizes, use the best for the jo

Uses:

for smoothing and finishing surfaces, cast alloy and porclein surfaces

29
Q

What is this instrument?

A

White stone slow handpiece

= Alundum

N.b. Different shapes and sizes, use the best for the job

Uses:

Smoothing and finishing surfaces, cast alloy and porcelein

30
Q

What is this instrument?

A

Mandrel slow handpiece bur

= Fit soft flex disk onto the surface = for polishing large composites (n.b. ask before use on clinic!)

31
Q

What is this instrument?

A

637 diamond fast handpiece bur

= tapered

Uses:
All ceramic crown prep

Champher finish lines

32
Q

What materials can polishing cups be used on?

A

Porcelein & gold

33
Q

Which material are most dental instruments made of?

A

Stainless steel

34
Q

What other tips may instruments have?

And what is the purpose of this material?

A

Tungsten carbide

= self sharpening

35
Q

What are the 3 parts of an instrument?

A

Handle

Shank

Working part

36
Q

What are the 4 different types of mirror?

A

Front reflecting

Rear reflecting

Magnifying

Plain

37
Q

What are the (5) different uses of mirrors?

A
  • Retracting soft tissues
  • Protecting tissues
  • Indirect vision
  • Reflecting light
  • Trans-illumination (for detailed examination = reflects operating light through anterior tooth -> caries show up as shadows)
38
Q

How do you determine if a mirror is front or rear reflecting?

A

Hold instrument up to mirror:

if images appear to touch = front reflecting

if gap between images = rear reflecting (n.b. this is the mirror we generally use)

39
Q

What are the (3) uses of a No. 18 probe?

A
  • Diagnosis (gently detect caries, detect restorations and assessing restoration margins)
  • Removing plaque
  • Checking condition of dentine in cavity
40
Q

What are the 3 types of college tweezers?

A
  1. Standard
  2. Locking (e.g. for root canal)
  3. Endodontic
41
Q

What are the 4 uses?

A
  • Transferring cotton rolls to mouth
  • Drying cavity with cotton ball
  • Holding paper to dry canal
  • transferring GP points
42
Q

What are the (3) uses for the 125/126 excavator (spoon)?

A

Caries removal

Removal of temporary dressings

Applying lining material

43
Q

What is the use for 133/4 discoid excavator?

A

Caries removal

44
Q

What is the 212/3 excavtor / marginal trimmer used (2) for?

A
  • Remove unsupported enamel prisms (particularly class II -> floors of interproximal box and wall)
  • used where a bur may cause damage to adjacent tooth
45
Q

What is the PF-10 used for?

A

Applying flowable lining cement in a thing layer

(another type - thymozin = single ended)

46
Q

What is a flat plastic used for?

A
  • Trasnfer and shape dental cements or restoritive materials where pressure is NOT required (e.g. not for amalgam!) to codense them into the cavity
    n. b. often teflon/titanium nitride/gold coated to stop composite adhering to instrument
47
Q

What is an amalgam plugger used for?

What are the two types?

A

Press amalgam into a cavity = compress

Types;

Smooth = flat end to condense

Indented = cross hatched pattern

n.b. also come in different sizes and tip angulations

48
Q

What is a wards no. 2 carver used for?

A

To carve amalgam restorations

= flat end & sharp pointed end

49
Q

What are the uses of carvers (1/2 hollenbach & wards no. 2)?

A

Sharp/semi sharp blades = cutting or scraping amalgam filling material where smoothness is important

50
Q

What is a P1 composite instrument used for?

A

Putting in the final composite layers in a nice anatomical way (shape the surfce to conform with naturl anatomy)

n.b. come with different sized cones/tips

51
Q

What is torque?

A

Turning force of rotary instruments (air motor only)

= the ability of the handpiece to withstand lateral pressure on the revolving tool without decreasing the speed or cutting efficacy

  • speed is inversley proportional to torque
52
Q

What is the air turbine (fast) handpiece used for?

A

Access caries

(with water)

53
Q

What is the air motor (slow) handpiece used for?

A

Removal of caries

54
Q

What is a contrangle handpiece?

A

More bent

Colour codings:
Blue band -> ratio of speed to motor and bur = 1:1 ratio

Green band -> gearing system = decreased speed = 2:1

Red band -> speed increases = used for crowns and bridges, usually used on micromotor and not an air motor

55
Q

What is the optimum drill speed for endodontic treatment?

A

112 rpm

56
Q

What level of torque and speed is more efficient to cut hard materials (e.g. enamel, porcelein and metals)?

A

High speed

Low torque

57
Q

What level of torque and speed is more efficient to cut soft materials (e.g. caries & pulp)?

A

Low speed

High torque

58
Q

Whar does RPM stand for?

A

Revolutions per min (speed of rotation)

Yr 2 - OSCE & e-assessments (7 decks)

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