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Operative Dentistry > Quiz on Complex Amalgam > Flashcards

Quiz on Complex Amalgam Flashcards

1
Q

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

A

“control”

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2
Q

Indications for complex amalgams: patient cannot ______ a crown

A

afford

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3
Q

CONTRAindications for complex amalgams: Severe _______ problems

A

occlusal

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4
Q

CONTRAindications for complex amalgams: ________ important area

A

esthetically

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5
Q

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

A

anatomical

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6
Q

Complex Amalgam Restorations ADVANTAGES!– ________ tooth structure!

A

Conserves

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7
Q

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

A

appointment

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8
Q

Complex Amalgam Restorations ADVANTAGES!– Less ________ than indirect restorations

A

EXPENSIVE

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9
Q

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

A

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

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10
Q

Complex Amalgam Restorations disADVANTAGES :( Its not very structurally _______

A

durable

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11
Q

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

A

retention

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12
Q

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

A

contours (pssshh, whatev’s)

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13
Q

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

A

perforation, microfracture

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14
Q

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

A

2/3

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15
Q

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

A

cusp

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16
Q

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

A

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

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17
Q

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

A

1 retention feature per missing cusp!

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18
Q

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

A

greater or equal to 1.5mm

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19
Q

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

A

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

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20
Q

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

A

buccal

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21
Q

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

A

lingual

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22
Q

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

A

facial or lingual groove

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23
Q

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

A

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

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24
Q

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

A

converge

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25
Q

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

A

flat and perpendicular

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26
Q

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

A

Cavo-surface

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27
Q

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

A

steps (like our “shoulder” that we put into it)

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28
Q

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

A

rounded

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29
Q

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

A

90 degrees…..undermined

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30
Q

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

A

slots, troughs, or pins

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31
Q

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 _____

A

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

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32
Q

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

A

dentin…0.5mm…DEJ….DEJ

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33
Q

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

A

convergent

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34
Q

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

A

endodontically

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35
Q

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

A

self-threading…retentive

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36
Q

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

A

NO SIGNIFICANT DIFFERENCE

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37
Q

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

A

PINS

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38
Q

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

A

SLOTS

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39
Q

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

A

Slots….pins

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40
Q

SLOTS VS PINS-____ remove more tooth structure

A

Slots

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41
Q

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

A

DENTIN

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42
Q

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

A

Self-threading pins….0.5mm..slots

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43
Q

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

A

pins

44
Q

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!

A

PINS=Recurrent Caries!

45
Q

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

A

pins

46
Q

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

A

PINS

47
Q

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)

A

retention…fracture

48
Q

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

A

0.5mm

49
Q

Pin Placement Technique: Pin hole prepared on a _____ surface

A

flat!

50
Q

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

A

0.5

51
Q

Pin Placement Technique: 1 pin per missing _______

A

AXIAL LINE ANGLE, place it at the line angle!

52
Q

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

A

max 1st PM

53
Q

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

A

mandibular molars

54
Q

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

A

maxillary molars

55
Q

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

A

maxillary and mandibular molars

56
Q

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

A

1/4 round bur

57
Q

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

A

perio probe

58
Q

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

A

Non-parallel

59
Q

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 ______

A

low speed…(2.0mm)…USE WATER!

60
Q

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

A

stop….reinsert

61
Q

Can you bend pins?

A

yes, with a “special instrument”

62
Q

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

A

blood….perforated

63
Q

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

A

At the end of the appointment

64
Q

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

A

endodontic

65
Q

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

A

CaOH ( Dycal or Life)….1.5-2.0mm away

66
Q

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 ______

A

cut…cast…amalgam

67
Q

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

A

flap…MTA(portland cement!)…Crown lengthening

68
Q

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?

A

4-6mm, no post needed!

69
Q

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

A

4-5mm

70
Q

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

A

Megalloy-it is STRONGER and SETS FASTER than dispersalloy!

71
Q

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

A

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

72
Q

Bonding resin may interfere with the self ______ capability of amalgam

A

SEALING

73
Q

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 ______.

A

middle…missing cusp

74
Q

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

A

angled…opposite

75
Q

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

A

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

76
Q

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

A

a Garrison PINCH matrix!

77
Q

LETS DROP SOME KNOWLEDGE: Which amalgam is Spherical?

A

Megalloy

78
Q

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

A

Dispersalloy

79
Q

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

A

megalloy

80
Q

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

A

dispersalloy

81
Q

LETS DROP SOME KNOWLEDGE: Which amalgam has LESS mercury?

A

megalloy

82
Q

LETS DROP SOME KNOWLEDGE: Which amalgam has MORE mercury?

A

dispersalloy :(

83
Q

LETS DROP SOME KNOWLEDGE: Which amalgam sets faster?

A

megalloy

84
Q

LETS DROP SOME KNOWLEDGE: which amalgam sets slower?

A

dispersalloy

85
Q

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

A

Megalloy…no delayed expansion and no H2 Gas

86
Q

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

A

dispersalloy….NO WET environments!

87
Q

LETS DROP SOME KNOWLEDGE:Which amalgam is stronger?

A

megalloy

88
Q

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

A

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

89
Q

Amalgam Selection: Strong Contacts are going to be difficult.

A

Dispersalloy-didnt give a good reason

90
Q

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

A

megalloy

91
Q

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

A

megalloy

92
Q

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

A

dispersalloy

93
Q

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

A

form the cusp with the DOUBLE ENDED PLASTIC INSTRUMENT

94
Q

What instrument do I use to make the occulsal embrasures?

A

explorer

95
Q

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

A

double ended plastic instrument

96
Q

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

A

1.5mm…2.5mm

97
Q

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

A

0.5 to 1.0mm

98
Q

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

A

3.0mm

99
Q

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

A

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

100
Q

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

A

lingual

101
Q

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

A

2.5mm

102
Q

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

A

pulpal

103
Q

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

A

1.0mm below

104
Q

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.

A

the PIN…0.5mm

105
Q

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

A

1.0mm…line angle

Operative Dentistry (25 decks)

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