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Intro to Fixed Prosthodontics > Week 13 > Flashcards

Week 13 Flashcards

1
Q

what are the factors that affect the selection of material

A
  1. destruction of tooth structure
  2. esthetics
  3. plaque control
  4. financial considerations
  5. retention
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2
Q

what is the 50% rule

A

if 50% of the original tooth is gone, would want to do a full crown restoration

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3
Q

order of resistance of removal force of 4 different types of restorations from lowest to highest

A

MOD onlay < 3/4 crown < 7/8 crown < all-metal crown

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4
Q

what are intracoronal restorations?

A

inside crown, inside tooth

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5
Q

what can be used for intracoronal restorations?

A
  1. glass ionomer
  2. composite resin
  3. simple amalgam
  4. complex amalgam
  5. metal inlay, ceramic inlay, MOD onlay
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6
Q

what type of glass ionomer do we use at creighton

A

Fuji IX

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7
Q

what is a semi permanent material

A

glass ionomer

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8
Q

what is a “jack-of-all-trades” material

A

glass ionomer

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9
Q

composite resin is commonly used to restore what type of lesions?

A

Class III and Class V (on anterior teeth per book)

Gradoville says also could be on Class I

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10
Q

what should you be careful not to do with composite resin?

A

be careful not to over-use it

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11
Q

simple amalgam vs complex amalgam

A

simple amalgam - restoration placed in MOD preparation on a molar
complex amalgam - restoration replaces missing cusp on a molar

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12
Q

metal inlays are synonymous with what?

A

gold inlays

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13
Q

what are the types of extracoronal restorations

A
  1. partial coverage crowns
  2. all-metal crown (FCC)
  3. metal-ceramic crown (MCC)
  4. all ceramic crown (ACC)
  5. ceramic veneer (laminate)
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14
Q

give an example of a partial coverage crown

A

a 3/4 crown seated on a molar

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15
Q

give example of FCC

A

all metal crown on a maxillary second molar

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16
Q

give an example of MCC

A

metal ceramic crown on a maxillary premolar

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17
Q

which molar must always used metal crowns? which must always be ceramic?

A

2nd molar always metal
1st can be ceramic

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18
Q

what restoration has the largest longevity rating

A

intracoronal - glass ionomer

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19
Q

which restorations have the smallest longevity ratings

A
  1. intracoronal - simple amalgam
  2. intracoronal - MOD onlay
  3. exracoronal - partial coverage crown
  4. extracoronal - all-metal crown
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20
Q

what type of retention do metal and ceramic inlays have

A

minimal retention

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21
Q

what type of retention do MOD onlays, and partial coverage crowns have

A

moderate retention

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22
Q

what type of retention do all-metal crowns, all-ceramic crowns, and metal-ceramic crowns have?

A

good retention

23
Q

what type of retention do ceramic veneers have

A

adequate retention

24
Q

how many degrees does an 856 diamond have

A

3.5 degrees

25
what provides space for adequate bulk of restorative material (metal/porcelain) in an area of heavy occlusal contact
functional cusp bevel
26
what also used to be referred to as porcelain-fused-to-metal (PFM), consists of a ceramic layer bonded to a thin cast metal coping that fits over prepared tooth?
MCC - metal ceramic crown
27
what combines the strength and accurate fit of metal with the esthetics of a ceramic crown
MCC - metal ceramic crown
28
what is the tooth preparation for an MCC
combination of all metal and all ceramic: shoulder on facial, and chamfer on lingual
29
what is expected on anterior tooth MCC prep
1. uniform reduction of 1.2 mm over entire facial surface 2. two-planed facial reduction blended together
30
what is the area of only metal lingual on the tooth
metal coping
31
what material is located anteriorly on a MCC crown
ceramic
31
what material is located anteriorly on a MCC crown
ceramic
32
on posterior teeth, MCCs are best used on what teeth
maxillary first molars and premolar can also be indicated for mandibular premolars
33
we should limit the use of MCC porcelain occlusal on which posterior teeth
2nd molars
34
what material is more abrasive than gold
glazed porcelain
35
what should you used for posterior MCC occlusal reduction
diamond 856 or 169
36
what should you use for posterior MCC functional cusp bevel
diamond 856 orr 169
37
what should you used for depth orientation grooves
coarse-grit flat-end tapered diamond (847)
38
for facial reduction for MCC prep what bur
847 coarse-grit flat-end tapered diamond
39
for proximal axial reduction what bur to use MCC prep
888 needle diamond
40
what type of MCC usage is getting reduced due to the advent of quality all-ceramic restorations
anterior MCC
41
when creating a putty matrix, the index should contact what?
the labial and lingual surfaces of the teeth on either side of the tooth to be prepared
42
when creating putty matrix for anterior MCC, how should you cut the index?
cut into a labial and lingual half
43
for anterior MCC, the lingual reduction must preserve what?
a retentive plane
44
for anterior MCC, the lingual clearance must be what?
at least 0.7 mm
45
when doing a lingual reduction for anterior MCC< what type of bur should you use?
coarse-grit football shaped diamond 379
46
how much occlusal clearance on an MCC prep?
~1.5 mm
47
do we want occlusal reduction or clearance for MCC prep?
CLEARANCE!!!
48
what should the margin of the shoulder on an MCC preparation be?
1 mm shoulder on facial
49
what should the margin of the chamfer on an MCC prep be?
0.5 mm chamfer on lingual
50
for a MCC posterior prep, what should the wall height be?
at least 3-4 mm tall
51
should you do a chamfer all the way around or shoulder all the way around first when doing MCC prep?
CHAMFER
52
what type of restoration can use an FPD abutment?
1. partial coverage crown 2. all metal crown 3. metal ceramic crown
53
what type of restoration can use RFD abutment
1. simple amalgam 2. complex amalgam 3. metal inlay 4. metal onlay 5. partial coverage crown 6. all metal crown 7. metal ceramic crown

Intro to Fixed Prosthodontics (11 decks)

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