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Operative > Lecture 1 > Flashcards

Lecture 1 Flashcards

1
Q

Name parts of the tooth from the outside in

A

Enamel, dentin, pulp

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2
Q

Describe enamel

A

Brittle

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3
Q

Describe dentin

A

Ductile

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4
Q

What is operative dentistry?

A

The science and art in dentistry that studies the prevention, diagnosis, treatment of defects in enamel and dentin

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5
Q

Carious

A

Bacterial jnfection, remove diseases tissue, precise cavity prep

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6
Q

Non carious

A

Loss of surface tooth structure due to mech or chemical factors. Ex attrition abrasion erosion

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7
Q

Dental caries

A

Bacterial infectious disease that attacks tooth surface

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8
Q

Cavity prep

A

Mech alteration to remove the disease tooth structure

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9
Q

Restoration

A

Dental material used to restore back function and morphology of the missing part of the tooth structure

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10
Q

Direct restoration

A

Dental material places in a soft state directly in cavity preparation to restore contour before it sets hard

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11
Q

Indirect restoration

A

Restoration fabricated outside the oral cavity then bonded in

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12
Q

Handpiece

A

Device that holds and delivers power to rotating instruments to perform tooth prep

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13
Q

Pros of electric driven handpiece?

A

Quieter, cuts with higher torque, higher power and less stalling

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14
Q

Slow speed

A

No water, less efficient but more controlled,

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15
Q

Uses for slow speed

A

Controlled removal, cleaning external surface of tooth, finishing and polishing

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16
Q

Medium speed

A

12,000-20,000 rpm

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17
Q

High speed

A

> 20,000, water coolant, most cutting efficiency

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18
Q

High speed uses

A

Teeth prep, removal of old restorations

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19
Q

What are straight handpieces used for?

A

Extra oral procedures, uses a straight bur

20
Q

Contra angled attachment used for?

A

Intra oral procedures

21
Q

What are blades instruments used for?

A

Excavating (6 or 8 blades) and finishing (10-20 blades)

Least to most blades: red, yellow, white

22
Q

The greater number of blades the…

A

Smoother the finish

23
Q

Carbide for blade cutting uses

A

Intracoronal preps

24
Q

Diamond for abrasive cutting uses

A

Extra coronal preps

SuperFine to supercoarse: yellow, red, blue, green, black

More fine = smoother finish

25
Q

Coated abrasives are used for…

A

Finishing restorations

26
Q

Proximal is…

A

Closer to the shank

27
Q

Distal is…

A

Further from the shank

28
Q

The inverted cone bur is…

A

Conical in shape and flat on bottom

29
Q

What plain cylindrical fissure bur do we have?

A

57, 1.0mm in diameter, no taper

30
Q

Plain Tapered fissure, describe

A

Tapered smaller at distal end

31
Q

Abrasive cutting is…

A

More efficient with brittle materials, less with ductile material

32
Q

Rake face

A

The surface that forms the chip

33
Q

Clearance face

A

Surface that clears the chip

34
Q

Edge angle

A

Angle between take and clearance surface

35
Q

Positive take angle =

A

Efficient and forms larger chips, breaks easier, clogs easier. Most dental tools have negative take angle

36
Q

Purpose of clearance angle

A

Prevents blade from rubbing

Smaller clearance angle = more filling, more friction

37
Q

Hand cutting instruments

A

Refine the walls of the tooth prep to receive the restoration

38
Q

Restorative instruments

A

Insert dental material in the cavity prep and carve back tooth contour

39
Q

Periodontal probe

Michigan probe with Williams markings

A

Measures cavity depth

40
Q

3 unit formula

A

If the cutting edge and long axis of blade are PERPENDICULAR to one another

41
Q

1st number on blades

A

Width of blade in 10th of mm

42
Q

2nd number on blade

A

Length of blade in mm

43
Q

3rd number on blade

A

Angle of blade to the long axis of handle. In centigrade, not degrees

44
Q

4 unit formula

A

2nd number indicated the primary cutting edge relative to the long axis of blade

45
Q

Direct cutting

A

Force applied is perpendicular to cutting edge.

46
Q

Indirect cutting / lateral scraping

A

Force exerted is parallel to the cutting edge

Operative (2 decks)

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