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Operative Dentistry > Numbers > Flashcards

Numbers Flashcards

1
Q

What’s the initial depth of Class I in DEJ?

A

0.2 mm (for posterior teeth: 1.5 - 2.0 mm)

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2
Q

How deep in DEJ for Class II?

A

0.2 mm

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3
Q

What is the axial wall for Class III into dentin?

A

0.2 mm

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4
Q

What is the depth of a Lingual prep inside DEJ?

A

0.2 mm

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5
Q

What are the dentinal depths of the Axial wall of the proximal box?

A

Crown: 0.5 - 0.6 mm
Root: 0.75 - 0.8 mm

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6
Q

How much should be the remaining dentin thickness to place Resin Modified Glass Ionomer (RMGI) cement?

A

0.5 -1.5 mm

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7
Q

How much should be the remaining dentin thickness to place Calcium Hydroxide liner?

A

0.5 mm

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8
Q

How much is the width for bevelling?

A

0.5 - 2.0 mm

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9
Q

What is the angle to the

external surface when bevelling?

A

45-degree angle

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10
Q

How wide are the slots?

A

1 mm

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11
Q

How deep are the slots?

A

1 mm

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12
Q

How much is the length of the slots?

A

2 - 4 mm

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13
Q

How much are the slots in DEJ?

A

0.5 – 1.0 mm

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14
Q

What is the pinhole position relative to the DEJ?

A

1 mm in dentin

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15
Q

What is the pinhole position relative to the external tooth surface?

A

1.5 mm

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16
Q

How much is indicated for the axial depth inside the DEJ if retentive grooves are required?

A

0.5 mm

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17
Q

How much to establish (ideally) with adjacent proximal surface facially, lingually, and gingivally?

A

not more than 0.5mm

18
Q

What is the preparation of functional cusps and non-functional cusps for a complex amalgam?

A

functional cusps: 2 mm

non functional cusps: 1.5 mm

19
Q

What is the pinhole depth?

A

around 2 mm

20
Q

How long should you condensate amalgam?

A

2.5 - 3.5 min

21
Q

What is the initial depth of Class V restoration?

A
  1. 5 mm in DEJ

0. 75 - 0.8 mm in cementum for root caries

22
Q

Recommended mesiodistal width of lingual extension of class I, OL?

A

1 mm

23
Q

How much is the thickness of ferrule dentin?

A

1 mm

24
Q

How much is the height of ferrule dentin?

A

2 mm

25
Q

How far from the facial or lingual DEJ are the retention grooves
and how deep?

A

From DEJ: 0.2 mm

Deep: 0.5 mm

26
Q

How much is the required gingival clearance for class II?

A

FROM ADJACENT TOOTH: 0.5 mm max

Facial must stay in contact

27
Q

What is the initial depth to DEJ for posterior teeth?

A

1.5 - 2.0 mm

28
Q

How long to light cure a composite?

A

40’’

29
Q

How long to light cure adhesive?

A

20’’

30
Q

How deep should the increments of a composite be?

A

2 mm

31
Q

How deep to prepare another pinhole from the original?

A

1.5 mm

32
Q

What should the cavo surface and marginal amalgam be far extensive prep class I?

A

Cavo surface 90 - 100 degrees

Marginal amalgam 80 degrees

33
Q

How close to the proximal surface should we extend in a class II?

A

0.8 mm away from cutting through the marginal ridge

34
Q

What should be the minimal distance from margin of cavity to proximal surface?

A

1.6 mm premolars

2 mm molars

35
Q

What should be the maximum width at the isthmus of a cavity prep class I?

A

No more than 1/3 of intercuspal distance

36
Q

What is the initial depth of class I?

A

1.5 - 2 mm measured from the central fissure

37
Q

Which Bur do we use for class I restoration?

A

245

38
Q

Which Bur is used to make retention grooves in class II?

A 
1/4 round bur
# 169
39
Q

What should be the recommended isthmus width in class II on occlusal surface?

A

No wider than 1/4 intercuspal distance. It is wider than class I at proximal box

40
Q

What is the guideline for formation of the proximal box in class II?

A

extend gingivally past either caries or occlussal contact (whichever is deeper)

2/3 expense of enamel 1/3 expense dentin

41
Q

What is the minimum thickness of a Class I
amalgam restoration?

a. There is no minimum thickness.
b. 1mm.
c. 1.5mm.
d. 2.5mm.

A

c. 1.5mm

Operative Dentistry (7 decks)

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