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Op Dent 1 > Day 1 Lecture 1 > Flashcards

Day 1 Lecture 1 Flashcards

1
Q

Operative Dentistry

A

The science and art in Dentistry that studies the prevention, diagnosis and treatment of defects/disease in the enamel and dentin.

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2
Q

Carious

A

Bacterial infection, removal of tissue, precise cavity prep.

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3
Q

Non-carious

A

Loss due to chemical or mechanical abrasion. Attrition, abrasion, erosion, abfraction

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4
Q

Attrition

A

Breakdown from pressure

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5
Q

Abfraction

A

Angular notch caused by bending of tooth

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6
Q

Direct Restoration

A

Soft material placed then hardened.

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7
Q

Indirect Restoration

A

Formed outside body then cemented or bonded to tooth

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8
Q

Airdriven vs. Electric

A

Volume, higher power, less stalling

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9
Q

Slow speed

A

12000 RPM, no water coolant, close to pulp removal, surface polishing and finishing.

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10
Q

Medium Speed

A

12-20 thousand

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11
Q

High Speed

A

> 200000, needs water coolant, most cutting.

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12
Q

Most common connector line

A

4 hole

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13
Q

Slight angle

A

Contrangled

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14
Q

Base of hand piece

A

coupler

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15
Q

Push button

A

One chuck mechanism

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16
Q

Nose cone

A

Straight attachment, slow speed, extraoral work, long shank type bur, straight bur.

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17
Q

2 latch type head

A

Swing latch

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18
Q

Friction Grip head

A

Slow speed, push/screw

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19
Q

Rotary Cutting Instruments 3 components

A

Head neck shank

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20
Q

3 types of rotary instruments

A

Bladed, Diamond (abrasive), Other (?)

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21
Q

Tapered neck - why

A

Visibility

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22
Q

Bladed instruments

A

Excavating, Finishing

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23
Q

Finishing burs

A

10-30 blades - 10-12 red, 16-20 yellow, 30 white

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24
Q

Excavating/cutting burs

A

6-8 blades

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25
Q

Blade cutting composition/use

A

Tungsten carbide, intracoronal prep

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26
Q

Diamond for abrasive cutting

A

metal blank with diamond for extracoronal preps.

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27
Q

Diamond colors

A

Supercoarse to superfine: black, green, blue, red, yellow

28
Q

Other (type of rotary instrument)

A

Discs (attached via handpiece via mandrel for finishing restorations), Molded (grinding etc.)

29
Q

Round (Blade design)

A

1/4 -4 (0.5 mm to 1.4 mm)

30
Q

Inverted Cone (blade design)

31
Q

Pear shaped (blade design)

A

330 (1.5 mm, diam = 0.8mm, taper = 8deg), 245 (length - 3mm, taper = 4deg, diam = 0.8mm)

32
Q

Plain Cylindrical Fissure

A

55-59 (200 series for rounding corners)

33
Q

Plain Tapered Fissure

34
Q

Head design - end cutting

A

End only has blades - 900s

35
Q

Cross cut

A

500 before bur number, also 700

36
Q

Fracture types

A

Brittle, ductile

37
Q

Brittle fracture

A

ABRASIVE CUTTING IS BEST for extracoronal preps - diamond bur Tensile loading causes cracks in enamel, helps break

38
Q

Ductile Fracture

A

Deformation by shearing - dentin Bladed cutting is best (deform then shear) - best for intracoronal preps

39
Q

Rake face

A

Blade surface toward cutting, forms chip

40
Q

Clearance face

A

Surface that clears the chips- away from cutting direction

41
Q

Rake angle

A

Rake to axis of bur

42
Q

Edge angle

A

Rake face to clearance face

43
Q

Clearance angle

A

Clearance face to tangent (cutting edge to tooth surface) - prevents blade from rubbing on tooth surface, bigger clearance angle = less friction = longer bur life

44
Q

Positive vs negative rake angle

A

More efficiency and less durable. Higher cutting efficiency, more chips made, less chip space (clogging)

45
Q

Patient hazard of cutting instruments

A

Heat and vibration can lead to pulpal trauma (water coolant helps this)

46
Q

Hand instrument components

A

Handle, shank, working end (nib/point for non cutting, blade for cutting)

47
Q

Non-cutting

A

Examination instruments (mirror, explorer, perio probe)

48
Q

Hand-cutting

A

shape walls for finer detail - blade is carbon steel, handle is stainless steel

49
Q

Restorative instruments (noncut)

A

place material and carve material - carrier, condenser/plugger, anatomical/acorn burnisher

50
Q

accessory instruments

A

aid procedure- miller forceps (paper holder), amalgam well

51
Q

Mirror

A

left hand, retraction of tissue and protection.

52
Q

Explorer

A

Pointed tip (enhanced tactile) for caries detection

53
Q

Perio probe

54
Q

Blade edges

A

Primary/2 secondary cutting edges

55
Q

Blade edge types

A

Straight, mono angled, bin angle, triple angle

56
Q

Balance

A

Blade tip in line with center of tool

57
Q

Black’s Instrument Formula

A

1st: width of blade in 1/10mm, 2nd: blade length in mm, 3rd: Angulation w/respect to long axis (100ths, lower than 50)

58
Q

4 number formula

A

1st, 2nd to 3rd, 3rd to 4th, new 2nd: primary cutting edge angle (100ths greater than 50)

59
Q

Single bevel

A

right triangle

60
Q

Bibevel

A

isosceles triangle

61
Q

Triple bevel

A

Rec/bibeveled on 3 sides

62
Q

Direct cutting

A

Perpendicular force, hatchet used

63
Q

Indirect cutting/lateral cutting

A

Parallel force

64
Q

Chisels

A

Straight, slightly curved, bin angled hatchets, enamel hatchet, gingival margin trimmer

65
Q

Enamel hatchet

A

lateral cutting and direct cutting

66
Q

Gingival margin trimmer

A

lateral cutting, curved blade to facilitate this

67
Q

Excavator

A

Ordinary hatchet, hoes (pull), angle former, spoon

Op Dent 1 (17 decks)

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