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Operative Dentistry > Operative Dent. (8-25) > Flashcards

Operative Dent. (8-25) Flashcards

1
Q

operative dentistry

A

science and art that studies the prevention, diagnosis, treatments of enamel & dentiin

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2
Q

operative dentistry

A

science and art that studies the prevention, diagnosis, treatments of enamel & dentiin

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3
Q

carious lesion

A

caused by bacterial infection

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4
Q

non carious lesion

A

loss of surface tooth structure - mechanical or chemical factors

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5
Q

direct restoration

A

dental material placed in a soft state directly in cavity preparation - amalgam/composit

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6
Q

indirect restoration

A

a restoration fabricated outside the oral cavity then cemented or bonded to tooth - crowns

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7
Q

slow speed handpiece

A
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8
Q

high speed handpiece

A

> 200,000rpm - need water coolant - used to prep teeth and remove old restorations

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9
Q

the greater the number of blades…

A

the smoother the finish

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10
Q

carbide blades are used for ____

A

intracoronal preparations

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11
Q

diamond blades are used for ____

A

extracoronal preparations

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12
Q

abrasive cutting (diamond burs)

A

more efficient with brittle materials - not efficient with ductile material due to plastic deformation

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13
Q

rake face

A

surface that forms the chip - the surface of the blade towards the direction of cutting

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14
Q

clearance face

A

surface that clears the chips - away from direction of cutting

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15
Q

edge angle

A

between the rake and clearance surfaces

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16
Q

rake angle

A

between the radial line and the rake face

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17
Q

clearance angle

A

the angle that provides clearance between the cutting edge and the tooth structure -

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18
Q

positive rake angle

A

when the radius is ahead of the rake face - higher cutting efficiency - larger chips produced -

19
Q

negative rake angle

A

when the rake face is ahead of the radius - dec. cutting efficiency -

20
Q

Black’s Instrument Formula (3 digit)

A

1st number - width of the blade in tenths
2nd # - length of the blade
3rd - angle of the blade to the long axis of the handle

21
Q

direct cutting

A

force applied is perpendicular to cutting edge - enamel hatchet

22
Q

direct cutting

A

force applied is perpendicualr to cutting edge - enamel hatchet

23
Q

indirect cutting/lateral cutting

A

force is exerted parallel to the cutting edge - enamel hatchet or gingival margin trimmer - motion from the beveled to the non beveled side -

24
Q

carious lesion

A

caused by bacterial infection

25
Q

non carious lesion

A

loss of surface tooth structure - mechanical or chemical factors

26
Q

direct restoration

A

dental material placed in a soft state directly in cavity preparation - amalgam/composit

27
Q

indirect restoration

A

a restoration fabricated outside the oral cavity then cemented or bonded to tooth - crowns

28
Q

slow speed handpiece

A
29
Q

high speed handpiece

A

> 200,000rpm - need water coolant - used to prep teeth and remove old restorations

30
Q

the greater the number of blades…

A

the smoother the finish

31
Q

carbide blades are used for ____

A

intracoronal preparations

32
Q

diamond blades are used for ____

A

extracoronal preparations

33
Q

abrasive cutting (diamond burs)

A

more efficient with brittle materials - not efficient with ductile material due to plastic deformation

34
Q

rake face

A

surface that forms the chip - the surface of the blade towards the direction of cutting

35
Q

clearance face

A

surface that clears the chips - away from direction of cutting

36
Q

edge angle

A

between the rake and clearance surfaces

37
Q

rake angle

A

between the radial line and the rake face

38
Q

clearance angle

A

the angle that provides clearance between the cutting edge and the tooth structure -

39
Q

positive rake angle

A

when the radius is ahead of the rake face - higher cutting efficiency - larger chips produced -

40
Q

negative rake angle

A

when the rake face is ahead of the radius - dec. cutting efficiency -

41
Q

Black’s Instrument Formula (3 digit)

A

1st number - width of the blade in tenths
2nd # - length of the blade
3rd - angle of the blade to the long axis of the handle

42
Q

Black’s Instrument Formula (4 digit)

A

1st - width of the blade
2nd - primary cutting edge
3rd - length of the blade
4th - angle of the blade relative to the long axis

43
Q

direct cutting

A

force applied is perpendicualr to cutting edge - enamel hatchet

44
Q

indirect cutting/lateral cutting

A

force is exerted parallel to the cutting edge - enamel hatchet or gingival margin trimmer - motion from the beveled to the non beveled side -

Operative Dentistry (3 decks)

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