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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
Q

what provides space for adequate bulk of restorative material (metal/porcelain) in an area of heavy occlusal contact

A

functional cusp bevel

26
Q

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?

A

MCC - metal ceramic crown

27
Q

what combines the strength and accurate fit of metal with the esthetics of a ceramic crown

A

MCC - metal ceramic crown

28
Q

what is the tooth preparation for an MCC

A

combination of all metal and all ceramic:
shoulder on facial, and chamfer on lingual

29
Q

what is expected on anterior tooth MCC prep

A
  1. uniform reduction of 1.2 mm over entire facial surface
  2. two-planed facial reduction blended together
30
Q

what is the area of only metal lingual on the tooth

A

metal coping

31
Q

what material is located anteriorly on a MCC crown

A

ceramic

31
Q

what material is located anteriorly on a MCC crown

A

ceramic

32
Q

on posterior teeth, MCCs are best used on what teeth

A

maxillary first molars and premolar

can also be indicated for mandibular premolars

33
Q

we should limit the use of MCC porcelain occlusal on which posterior teeth

A

2nd molars

34
Q

what material is more abrasive than gold

A

glazed porcelain

35
Q

what should you used for posterior MCC occlusal reduction

A

diamond 856 or 169

36
Q

what should you use for posterior MCC functional cusp bevel

A

diamond 856 orr 169

37
Q

what should you used for depth orientation grooves

A

coarse-grit flat-end tapered diamond (847)

38
Q

for facial reduction for MCC prep what bur

A

847 coarse-grit flat-end tapered diamond

39
Q

for proximal axial reduction what bur to use MCC prep

A

888 needle diamond

40
Q

what type of MCC usage is getting reduced due to the advent of quality all-ceramic restorations

A

anterior MCC

41
Q

when creating a putty matrix, the index should contact what?

A

the labial and lingual surfaces of the teeth on either side of the tooth to be prepared

42
Q

when creating putty matrix for anterior MCC, how should you cut the index?

A

cut into a labial and lingual half

43
Q

for anterior MCC, the lingual reduction must preserve what?

A

a retentive plane

44
Q

for anterior MCC, the lingual clearance must be what?

A

at least 0.7 mm

45
Q

when doing a lingual reduction for anterior MCC< what type of bur should you use?

A

coarse-grit football shaped diamond 379

46
Q

how much occlusal clearance on an MCC prep?

A

~1.5 mm

47
Q

do we want occlusal reduction or clearance for MCC prep?

A

CLEARANCE!!!

48
Q

what should the margin of the shoulder on an MCC preparation be?

A

1 mm shoulder on facial

49
Q

what should the margin of the chamfer on an MCC prep be?

A

0.5 mm chamfer on lingual

50
Q

for a MCC posterior prep, what should the wall height be?

A

at least 3-4 mm tall

51
Q

should you do a chamfer all the way around or shoulder all the way around first when doing MCC prep?

A

CHAMFER

52
Q

what type of restoration can use an FPD abutment?

A
  1. partial coverage crown
  2. all metal crown
  3. metal ceramic crown
53
Q

what type of restoration can use RFD abutment

A
  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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