Quiz on Complex Amalgam Flashcards Preview

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Flashcards in Quiz on Complex Amalgam Deck (105):
1

Indications for complex amalgams: for a "_______" restoration of a tooth has questionable pulp or periodontium.(EXT or RCT might be needed)

"control"

2

Indications for complex amalgams: patient cannot ______ a crown

afford

3

CONTRAindications for complex amalgams: Severe _______ problems

occlusal

4

CONTRAindications for complex amalgams: ________ important area

esthetically

5

CONTRAindications for complex amalgams: Cannot be restored properly due to _________ or functional considerations (contour, contacts, occlusion, inability to place a matrix)

anatomical

6

Complex Amalgam Restorations ADVANTAGES!-- ________ tooth structure!

Conserves

7

Complex Amalgam Restorations ADVANTAGES!-- One ________ instead of two as in a cast restoration

appointment

8

Complex Amalgam Restorations ADVANTAGES!-- Less ________ than indirect restorations

EXPENSIVE

9

Complex Amalgam Restorations ADVANTAGES!-- success rate at 5 years ___%-____% for amalgam vs. ____% for cast restorations

65%-72% for amalagam vs 84% for cast...so a viable alternative

10

Complex Amalgam Restorations disADVANTAGES :( Its not very structurally _______

durable

11

Complex Amalgam Restorations disADVANTAGES :( theres not much ______ so it can fall off

retention

12

Complex Amalgam Restorations disADVANTAGES :( Difficult to develop natural ______ and function

contours (pssshh, whatev's)

13

Complex Amalgam Restorations disADVANTAGES :( Potential for pulp and root _______ and dentin ________ when placing pins for retention

perforation, microfracture

14

Complex amal-PREP DESIGNS! When the isthmus exceeds ____ the distance between the facial and lingual cusp tips

2/3

15

Complex amal-PREP DESIGNS! When you had to remove a _____ :(

cusp

16

Complex amal-PREP DESIGNS! Plus, (tip, or cap) a cusp when the facial or lingual extension exceeds _____ the distance from a primary _______ toward the cusp tip

2/3....primary groove (so when you remove 2/3 of a cusp on the interproximal extension, the cusp has to go)

17

Complex amal-PREP DESIGNS! You NEED ____ retention feature PER missing cusp!

1 retention feature per missing cusp!

18

Complex amal-PREP DESIGNS! How much of a NON-Fxn cusp needs to be removed to support the amalgam?

greater or equal to 1.5mm

19

Complex amal-PREP DESIGNS! How much of a FUNCTIONAL cusp needs to be reduced to support the amalgam?

greater than 2mm (2-3mm)...shit needs to be THICK yo

20

If you get this wrong, I will kill you. ON the mandibular arch, the ______ cusps are the functional cusps.

buccal

21

If you get this wrong, I will kill you. ON the maxillary arch, the ______ cusps are the functional cusps.

lingual

22

Complex amal-PREP DESIGNS! Cusp reduction should be extended just below the extension of the ______ or ______ _______.

facial or lingual groove

23

Complex amal-PREP DESIGNS! DO NOT end the prep cavo-surface in a __________. End either BEFORE or AFTER it.

facial or lingual groove (i think i made this mistake in lab)

24

Complex amal-PREP DESIGNS! Opposing vertical walls should ________ slightly to the occlusal.

converge

25

Complex amal-PREP DESIGNS! Pulpal and gingival floors and tipped cusps should be _____ and ________ to the long axis of the tooth.

flat and perpendicular

26

Complex amal-PREP DESIGNS! All _______ margins are SHARP and well defined

Cavo-surface

27

Complex amal-PREP DESIGNS! Axial and occlusal- gingival "____" should be developed where possible

steps (like our "shoulder" that we put into it)

28

Complex amal-PREP DESIGNS! All internal line angles are _______

rounded

29

Complex amal-PREP DESIGNS! Angle of departure is ___ degrees (no _______ enamel)

90 degrees.....undermined

30

Complex amal-PREP DESIGNS! Auxiliary retention is provided by using ______, ______, or ____..... or a combination.

slots, troughs, or pins

31

Complex amal-PREP DESIGNS! Slot/trough placement--May be continuous or segmented, (_____ slots resist horizontal force as well as longer ones)...DEPTH of the slot is _____

shorter..the depth of the 34D (0.8mm)

32

Complex amal-PREP DESIGNS! All retention features are placed in ______...more specifically placed ____mm past the ____. (following the contour of the _____)

dentin...0.5mm...DEJ....DEJ

33

Complex amal-PREP DESIGNS! the slot you put in should have _______ walls, thank you 34D

convergent

34

Complex amal-PREP DESIGNS! Putting pins in _____ treated teeth is actually CONTRAINDICATED & AGAINST the Standard of Care!

endodontically

35

The most frequently used pin is the ________ type. They are the MOST _______!

self-threading...retentive

36

SLOTS VS PINS- There is ________ in the retention provided by slots and pins in vitro and in vivo

NO SIGNIFICANT DIFFERENCE

37

SLOTS VS PINS-_______ retention is used in preparations lacking vertical walls for steps or boxes

PINS

38

SLOTS VS PINS- _____ are used in preparations with short clinical crowns and in cusps that have been reduced 3-4 mm for amalgam

SLOTS

39

SLOTS VS PINS- ____ are less likely to create micro-fractures than are _____.

Slots....pins

40

SLOTS VS PINS-____ remove more tooth structure

Slots

41

SLOTS VS PINS- Failure of slot in ______ retained amalgam will be IMMEDIATE LOSS of the amalgam!

DENTIN

42

SLOTS VS PINS-_______ elicited an inflammatory pulpal response if placed within ___mm of the pulp; ____ placed in the same location did not!

Self-threading pins....0.5mm..slots

43

SLOTS VS PINS-_____ are more likely to result in perforations of the pulp or side of the tooth

pins

44

SLOTS VS PINS-Failure of a pin retained amalgam can be slip or fracture at first (but not fall out) and later very catastrophic due to ______ beneath it!

PINS=Recurrent Caries!

45

SLOTS VS PINS- Amalgam TENSILE and HORIZONTAL strength is weakened by ____

pins

46

SLOTS VS PINS-Believe it or not: _____ are NOT analogous to steel rebar reinforced concrete

PINS

47

SLOTS VS PINS- ______ of the restoration increases as the number of pins increases, but an excessive number of pins can ______ the tooth and significantly weaken the amalgam (more is not necessarily better)

retention...fracture

48

Pin Placement Technique: The pin hole goes ___mm past the DEJ.

0.5mm

49

Pin Placement Technique: Pin hole prepared on a _____ surface

flat!

50

Pin Placement Technique: Provide a minimum ____ mm CLEARANCE around the circumference of the pin for adequate amalgam condensation

0.5

51

Pin Placement Technique: 1 pin per missing _______

AXIAL LINE ANGLE, place it at the line angle!

52

Anatomical Features to AVOID when placing pinholes!!! The PROMINENT M concavity of the _______ (tooth perforation)

max 1st PM

53

Anatomical Features to AVOID when placing pinholes!!! Midfacial and midlingual BIFURCATIONS of _______ (tooth perforation)

mandibular molars

54

Anatomical Features to AVOID when placing pinholes!!! Mid facial, midmesial, and middistal FURCAITONS of _______ (tooth perforation)

maxillary molars

55

Anatomical Features to AVOID when placing pinholes!!! MF CORNERS of _____ AND ______ (possible pulpal penentration)

maxillary and mandibular molars

56

MORE Pin Placement Technique! Start with a _____ bur PILOT hole where you want the pin to start

1/4 round bur

57

MORE Pin Placement Technique! Use a ______ to align drill before placement

perio probe

58

MORE Pin Placement Technique! _______ placement of pins enhances the retention of the amalgam...interesting!

Non-parallel

59

MORE Pin Placement Technique! Rotate at _______ speed (300-500 rpm) and apply pressure preparing the pinhole in one or two insertions until the depth- limiting portion is reached (____mm)..oh and USE ______

low speed...(2.0mm)...USE WATER!

60

MORE Pin Placement Technique! NEVER _____ the drill in the pinhole...Never _______ the drill unless only used to half the depth the first time

stop....reinsert

61

Can you bend pins?

yes, with a "special instrument"

62

Pin placement ERRORS :O Sudden loss of RESISTANCE to the pin twist drill and the evidence of _____ IN the pinhole means you _______!

blood....perforated

63

Pin placement ERRORS :O When do I inform the patient?

At the end of the appointment

64

Pin placement ERRORS :O Whats next? Ideally ______ treatment should be done on compromised teeth if the pulp is exposed.

endodontic

65

Pin placement ERRORS :O Whats next? ________ may be placed over the pinhole and another hole prepared ___-__ _ mm away.

CaOH ( Dycal or Life)....1.5-2.0mm away

66

Pin placement ERRORS :O Perforations occlusal to the gingival attachment: 1. _____ the pin off FLUSH with the tooth surface. 2. Same as in 1 and extend a ____ restoration beyond the perforation 3. Remove the pin, ENLARGE the hole and restore with ______

cut...cast...amalgam

67

Pin placement ERRORS :O Perforations APICAL to the attachment: 1.Surgical ____, remove bone, enlarge hole and place amalgam or ____ 2. _________ surgery and extend a cast restoration below the perforation

flap...MTA(portland cement!)...Crown lengthening

68

You can use amalgam for a endo treated tooth for a crown build up when the pulp chamber height is ___-___mm. Do you need a post?

4-6mm, no post needed!

69

For an amalgam core build up, get ___-___mm into the canal orifice below the CEJ

4-5mm

70

Which type of amalgam do I use when making a crown buildup? Why?

Megalloy-it is STRONGER and SETS FASTER than dispersalloy!

71

Which is higher, composite bonded to enamel or amalgam bonded to enamel?

Composite to enamel bond strength is 20-25 MPa, amalgam bonded to enamel is 3-10 MPa...BOOM

72

Bonding resin may interfere with the self ______ capability of amalgam

SEALING

73

complex amalgam-THE MATRIX: When using a Tofflemire placed from a facial approach, keep the slot in the _____ of the tooth, and the slot is going to be opposite of the ______.

middle...missing cusp

74

complex amalgam-THE MATRIX: When needing to place the Tofflemire Lingually, use an ______ Tofflemire and place wedges on _______ sides.

angled...opposite

75

complex amalgam-THE MATRIX: What do I use when my Tofflemire slot is exposed?!

Freak out! Life is over!! Jk. Cut a matrix band and place it over the slot

76

complex amalgam-THE MATRIX: What type of matrix can I use in lieu of the Tofflemire?

a Garrison PINCH matrix!

77

LETS DROP SOME KNOWLEDGE: Which amalgam is Spherical?

Megalloy

78

LETS DROP SOME KNOWLEDGE: Which amalgam is AD-Mixed?

Dispersalloy

79

LETS DROP SOME KNOWLEDGE: Which amalgam has LESS condensation pressure?

megalloy

80

LETS DROP SOME KNOWLEDGE: which amalgam has MORE condensation pressure?

dispersalloy

81

LETS DROP SOME KNOWLEDGE: Which amalgam has LESS mercury?

megalloy

82

LETS DROP SOME KNOWLEDGE: Which amalgam has MORE mercury?

dispersalloy :(

83

LETS DROP SOME KNOWLEDGE: Which amalgam sets faster?

megalloy

84

LETS DROP SOME KNOWLEDGE: which amalgam sets slower?

dispersalloy

85

LETS DROP SOME KNOWLEDGE: Which amalgam has NO ZINC? What does this mean?

Megalloy...no delayed expansion and no H2 Gas

86

LETS DROP SOME KNOWLEDGE: which amalgam has ZINC? what does this mean?

dispersalloy....NO WET environments!

87

LETS DROP SOME KNOWLEDGE:Which amalgam is stronger?

megalloy

88

Amalgam Selection: Unable to place RD and isolation is poor...

Megalloy---dispersalloy has ZINC and is therefore not comparable with WET invironments

89

Amalgam Selection: Strong Contacts are going to be difficult.

Dispersalloy-didnt give a good reason

90

Amalgam Selection: I need amalgam to fill in the intricate grooves and slots

megalloy

91

Amalgam Selection: I need to prepare the crown on the same build-up appointment

megalloy

92

Amalgam Selection: It’s my first time and I’m worried about the amalgam hardening on me before I complete the carving.....!

dispersalloy

93

What is the KEY move in forming the cusp in our bulk amalgam?

form the cusp with the DOUBLE ENDED PLASTIC INSTRUMENT

94

What instrument do I use to make the occulsal embrasures?

explorer

95

What instrument do I use to REBURNISH the amalgam where the missing cusp is?

double ended plastic instrument

96

OUR complex amalgam preps #14: Isthmus is ___mm wide and ____ mm deep

1.5mm...2.5mm

97

OUR complex amalgam preps #14: ___ to ___mm contact separation

0.5 to 1.0mm

98

OUR complex amalgam preps #14: ___mm on the ML cusp removal

3.0mm

99

OUR complex amalgam preps #14: Retention trough placed along mesial-lingual line angle ___ mm away from exterior surface of enamel and ____ mm deep.

1.0mm (which was 0.5mm in our lecture?!?!)...1.0 mm deep (depth of 34D)

100

OUR complex amalgam preps #14: Extend prep BEYOND the _____ groove

lingual

101

OUR complex amalgam prep #30: Pulpal floor at least ___ mm deep

2.5mm

102

OUR complex amalgam prep #30: Lingual cusps removed to level of _____ floor

pulpal

103

OUR complex amalgam prep #30: Lingual SHOULDER placed ___ mm below pulpal floor

1.0mm below

104

OUR complex amalgam prep #30: Small circular cut into lingual axial wall to make space for ____, and there is AT LEAST ____mm of space between pin and axial wall.

the PIN...0.5mm

105

OUR complex amalgam prep #30: The pin at least ___ mm away from external enamel, and it is placed at the _____ of the tooth.

1.0mm...line angle