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Spring 15 Fixed Restorative > Quiz 1 > Flashcards

Quiz 1 Flashcards

1
Q

adaption

A

the degree of fit between a prosthesis and supporting structures

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2
Q

axial inclination

A

the alignment of the long axis of a tooth to a selected plane, often the horizontal plane

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3
Q

axis preparation

A

the planned line or path of placement and removal for a dental restoration

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4
Q

bevel

A
  • a slanting edge

- the process of slanting the finish line and curve of a tooth preparation

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5
Q

bur

A

a steel or tungsten carbide rotary cutting instrument

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6
Q

bur head

A

the cutting portion of a dental bur

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7
Q

bur head length

A

the axial dimension of the bur head

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8
Q

bur head shape

A

the geometrical outline form of the cutting surface edges, usually described successively by proximity from the shank to the tip end

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9
Q

bur shank

A

that component of the dental bur which fits into the head piece

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10
Q

butt

A

to bring any two flat-ended surfaces into contact without overlapping, as in a butt joint

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11
Q

chamfer

A

a finish line design for tooth preparation in which the gingival aspect meets the external axial surface at an obtuse angle

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12
Q

chamfer angle

A

the angle between a chamfered surface and one of the original surfaces from which the chamfer is cut

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13
Q

clearance

A

a condition in which bodies may pass each other without hindrance

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14
Q

clinicial crown

A

the portion of a tooth that extents from the occlusal table or incisal edge to the free gingival margin

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15
Q

complete crown

A

restoration that covers all the coronal tooth surfaces

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16
Q

convergence angle

A
  • the taper of a crown preparation
  • Recommended range 2-10 degrees
  • ideal 6 degrees
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17
Q

crown

A
  • the highest portion of a tooth occlusal to the dentioenamel junction or artificial substitute for this
  • to place a crown on a tooth, dental implant or tooth substitute
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18
Q

deformation

A

the change of form or shape of an object

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19
Q

dentin

A

a calcareous material similar to but harder and denser than bone that comprises that principle mass of the tooth

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20
Q

divergence

A

the reverse taper of walls or a preparation for a restoration

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21
Q

divergence angle

A

the sum of the angles of taper of opposing walls of a tooth preparation that diverge away from each other

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22
Q

draw

A

the taper or convergence of walls of a preparation for a restoration

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23
Q

extracoronal

A

that which is outside or external to, the crown proportion of a natural tooth

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24
Q

extracoronal retainer

A

that part of a fixed dental prosthesis uniting the abutment of the other elements of a prosthesis that surrounds all or part of the prepared crown

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25
Q

finish line

A

the terminal portion of the prepared tooth

26
Q

fit

A

the adaptation of any dental restoration to its site, in the mouth

27
Q

groove

A

a narrow channel or depression, such as the indentation between tooth cusp or the retentive features placed on tooth surfaces to augment the retentive characteristics of crown preparations

28
Q

interocclusal clearance

A

the amount of reduction achieved during tooth preparation to provide for an adequate thickness of restorative material

29
Q

line angle

A

the point of convergence of two planes in a cavity preparation

30
Q

lingual inclination

A

deviation of the coronal portion of a tooth from the vertical plane toward the tongue

31
Q

long axis

A

a theoretical line passing lengthwise through the center of a body

32
Q

margin

A

the outer edge of a crown, inlay, onlay or other restoration. The boundary surface of a tooth preparation and/or restoration is termed the finish line

33
Q

path of placement (POW)

A

the specific direction in which a prosthesis is placed on the abutment teeth or dental implants

34
Q

point angle

A

in the development of a cavity preparation, that place of convergence of three planes or surface

35
Q

retention

A

that quality inherent in the prosthesis acting to resist the forces of dislodgment along the path of placement

36
Q

retention arm

A

an extension that is part of a removable dental prosthesis and is used to aid in the fixation of the prosthesis; a part of a clasp

37
Q

retention form

A

the features of a tooth preparation that resists dislodgment of a crown in a vertical direction or along the path of placement

38
Q

shoulder finish line

A

a finish line designed for tooth preparation in which the gingival floor meets the external axial surfaces at approximately a right angle

39
Q

supragingival

A

that portion of a natural or artificial tooth that is coronal to the gingival crest

40
Q

taper

A

the convergence of two opposing external walls of a tooth preparation as viewed in a given plane

41
Q

undercut

A

any irregularity in the wall of a prepared tooth that prevents the withdrawal or seating of a wax pattern or casting

42
Q

veneer

A

a thin sheet of material usually used as a finish

43
Q

Fixed prosthodontics

A

fixed prosthodontic treatment involves the replacement and restoration of teeth by artificial substitutes that are not readily removable from the mouth

44
Q

patiente selection

A
  • chief complain
  • communication
  • dental history
  • medical history
  • palpation
  • percussion
  • periodontal examination
  • systemic conditions
  • (TMJ) temporomandibular joint dyfunction
45
Q

What are the principles of tooth preparation

A

1) biological consideration
2) mechanical consideration
3) esthetic consideration

46
Q

Things to consider during tooth preparation that affect future dental health

A
  • axial reduction
  • margins
  • occlusal considerations
  • preventing tooth fractures
47
Q

Mechanical considerations of tooth preparation

A

1) providing resistance from
2) providing retention form
3) preventing deformation of the restoration

48
Q

How do you provide resistance form

A

a. magnitude and direction of the dislodging forces
b. geometry of the tooth preparation
c. physical properties of the luting agent

49
Q

How do you provide retention form

A

1) magnitude of the dislodging forces
2) geometry of the tooth preparation
3) roughness of the fitting surface of the restoration
4) materials being cemented
5) film thickness of the luting agent

50
Q

How do you prevent deformation of the restoration

A

1) alloy selection
2) adequate tooth reduction
3) margin design

51
Q

What are the types of crown

A

CVC- complete veneer crown
MCC- metal ceramic crown
ACC- All ceramic crown
Zirconia

52
Q

What is a CVC

A

a cast-gold extracoronal restoration which covers the clinical crown

53
Q

Preparation

A

the final shape of the tooth produced by instrumentation to receive a restoration

54
Q

Complete veneer crown preparation

A

extracoronal preparation involving the entire clinical crown

55
Q

What are the indications that a crown is needed

A

1) extensive coronal destruction
2) short clinical crowns
3) endodontically treated teeth
4) maximum retention and resistance are needed
5) correction of axial contours

56
Q

What are the contraindications of a crown

A

1) wherever an intact buccal or lingual wall exists
2) if less than maximum retention and resistance are needed
3) if objectives can be met with a more conservative restoration

57
Q

What are the advantages of using a complete veneer crown

A
  • high strength

- good retentive qualities

58
Q

What are the disadvantage of using a complete veneer crown

A
  • removal of large amount of tooth structure
  • adverse effects on tissue
  • display of metal
  • vitality testing not feasable
59
Q

What are the sequence of steps of complete veneer crowns

A
  • occlusal guide grooves
  • occlusal reduction
  • axial guide grooves
  • axial reduction( Buccal and Lingual)
  • axial reduction (Interproximal)
  • finishing and evaluation
60
Q

What is the recommended dimensions

A

central groove: 1.0mm
functional cusp: 1.5mm
non-functional cusp: 1.0mm
chamfer width: 0.5mm

61
Q

Advantages and disadvantages of having a chamfer

A

advantage: distinct margin, adequate bulk, easier to control
disadvantage: care needed to avoid unsupported lip of enamel

62
Q

What should the final preparation provide

A
  • ideal retention form
  • ideal resistance form
  • maximum conservation of tooth structure

Spring 15 Fixed Restorative (1 decks)

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