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prosthodontics > fixed prosthodontics > Flashcards

fixed prosthodontics Flashcards

1
Q

2 types of restoration material for direct restorations

A

amalgam
composite

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2
Q

2 types of restorations

A

direct
indirect

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3
Q

4 materials used for indirect restorations

A

gold
porcelain
indirect composite
ceramic metal

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4
Q

inlay

A

indirect restoration that fills the inside of a cusp of a tooth

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5
Q

onlay

A

indirect restoration that fills the area extending out over one or more of the cusps

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6
Q

crowns

A

a “cap” that covers the surface of the portion of the tooth above the gum line

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7
Q

3 types of crowns

A

full
three- quarter crown
porcelain fused to metal crown

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8
Q

veneers

A

ultra thin shells of ceramic that are bonded to the front of the teeth mainly for esthetics reasons

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9
Q

what is another word for veneer

A

laminates

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10
Q

fixed bridge

A

a single appliance that is attached to two or more teeth on each side of the space where a tooth is missing

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11
Q

a typical bridge consists of..

A

a pontic
two retainers

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12
Q

pontic

A

filler tooth in the middle of a bridge

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13
Q

retainers

A

crown that goes on top of your existing teeth for a bridge

always two

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14
Q

shade guide

A

guide used to match the crown to the natural dentition of the patient

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15
Q

what lighting should a shade guide be done in

A

natural light

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16
Q

types of finished margins

A

chamfer
shoulder

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17
Q

when should a chamfer be used

A

full veneer crown
palatial of a metal/ceramic crown

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18
Q

when should a shoulder be used

A

porcelain jacket crown
buccal of a metal/ceramic crown

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19
Q

full crown

A

covers all anatomic portion of the tooth

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20
Q

3/4 crown

A

covers mesial, lingual, distal surfaces to keep strength and esthetics

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21
Q

spectrophotometer

A

device used for choosing correct tooth shade

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22
Q

reduction

A

lessening the size of the tooth

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23
Q

3 reasons to make a fixed partial denture

A

restore function
appearance
prevention

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24
Q

build up in crown and bridge support

A

replaces missing cusp or axial wall necessary for retention of final restoration

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25
Q

3 types of build up retention

A

threaded pins
preformed posts (paraposts)
custom cast dowels

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26
Q

threaded pins

A

build up with amalgam or tooth coloured composite

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27
Q

preformed posts

A

build up similar to threaded pins primarily used for multi-rooted teeth

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28
Q

initial interproximal reduction tool used

A

narrow tapered diamond bur

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29
Q

occlusal reduction

A

should follow the cuspal outline

30
Q

custom cast dowel cores

A

done separately from final restoration used primarily for single rooted teeth

31
Q

what is a retentive pin added for

A

strength and core build up

32
Q

best materials for core build up

A

amalgam gic composite

33
Q

post and core

A

a procedure that is required to rebuild a tooth in order to provide proper support for a crown

34
Q

post

A

a metal structure that’s is placed within the body of the root system f a tooth that has been previously rct treated

35
Q

gingival retraction

A

the technique of withdrawing gingival tissue from around the tooth and holding it out of the way

36
Q

when is a gingival retraction done

A

before the final impression

37
Q

3 method for gingival retraction

A

chemical method
mechanical method
electrosurgical method

38
Q

two functions of a retraction cord

A
  • displaces the free gingiva for completing the tooth preparation
  • opens the gingival sulcus for the impression
39
Q

how long is a retraction cord for anterior teeth

A

1 inch

40
Q

how long is the retraction cord for a posterior tooth

A

2 inches

41
Q

two types of retraction cords

A

impregnated cord

non-impregnated cord

42
Q

impregnated retraction cords

A

controls bleeding and causes tissue to shrink

impregnated with epinephrine or aluminum chloride

43
Q

what impregnated cord would you use for a patient with a heart condition…why

A

aluminum chloride because epinephrine is a vasoconstrictor

44
Q

non-impregnated cord

A

retracts tissue by packing force

45
Q

how long do you leave a retraction cord on

A

5-7 mins

46
Q

when would you use 2 retraction cords for one tooth

A

for molars with wider and a deeper sulcus

47
Q

what materials can you not use for final impressions

A

hydrocolloids, being alginate and agar

48
Q

final impression materials

A

polysulfide
condensation
addition silicones
polyethr

49
Q

what tooth in the dentition is darker than the rest

A

canine

50
Q

polysulfide

A

mixed in a 1:1 ratio- used the least

indicated for a complete denture, bite registration and a crown + bridge

51
Q

indications for condensation silicone

A

complete dentures
crown and bridge

52
Q

additional silicones

A

aka vinyl polysiloxane

indicated for crown + bridge, denture and bite registrations

53
Q

indications for polyether

A

crown and bridge
bite registration

54
Q

most popular final impression material..why

A

additional silicones

dimensionally stable, user friendly and accurate

55
Q

electrosurgery

A

crown lengthening

56
Q

what must a written prescription to a lab technician include

A

-dentist name, license # and signature
- dentist address
- patient name, age and gender
- shade selected
-prosthesis type
-date it is required back

57
Q

what 6 things happen in a dental lab for a PFM

A

1) impression is poured using gypsum
2) dies are made
3) metal core is fabricated
4) porcelain build-up over metal coping
5) porcelain is “baked” in porcelain furnace
6) porcelain is glazed

58
Q

master cast is also known as..

A

the final impression

59
Q

dies

A

exact replica of the prepared portion of a tooth made

60
Q

what is used for an optical impression

A

CADCAM

61
Q

metal core of a pfm

A

the inner portion that is covered by the porcelain

62
Q

milling

A

fills machine with porcelain to create crown

63
Q

itero

A

most common digital impression machine

64
Q

bite registration

A

provides lab technician with a reproduction of a patient bite

65
Q

glazing

A

making shiny

66
Q

Provisional crown and bridges

A

A temporary restoration that is repaired in place in position to the fun of restoration has been completed

67
Q

4 Provisional coverage purposes

A

-prevent thermal, shock, sensitivity, and discomfort
-Protect the margins of the preparation
-Prevent overeruption in shifting
-Maintain aesthetics

68
Q

Basic requirements for a provisional restorations

A

Provides complete coverage
Mai provide patient, comfort, aesthetics, and phonetics
Provide a
Able to perform mastication
Promo periodontal health

69
Q

6 materials used for provisional coverage

A

acrylic
Polycarbonate
Freeform, pedal crowns
Metal shells
Celluloid crown forms
Bis- acryl why, why composites

70
Q

acrylic provisional coverages

A

The most common material used in come in a variety of different shades

71
Q

Disadvantages to provisional coverage is made of acrylic

A

significant amount of heat given off by exothermic reaction
Strong and sometimes unbearable odor

prosthodontics (2 decks)

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