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Pediatrics > Lab 2: Stainless Steel Crown (SSC) and Restorations of Caries II > Flashcards

Lab 2: Stainless Steel Crown (SSC) and Restorations of Caries II Flashcards

1
Q

Occlusal surface is reduced ___-___mm and follows ___ form.

A

1-1.5; cusps

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2
Q

T/F. Proximal contact IS broken, with reduction NOT greater than 1mm.

A

True.

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3
Q

Proximal walls are ___ or slightly ___ to occlusal. Proximal cuts end ___ without chamfer, shoulder, or ledge.

A

parallel; convergent; cervically

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4
Q

Proximal walls are ___ when viewed from occlusal and ___ to arch perimeter.

A

straight; perpendicular

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5
Q

T/F. When prepping for a SSC, the cerivcal bulge remains and there is little to no buccal or lingual reduction.

A

True.

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6
Q

The crown is trimmed ___mm below the gingival margin. and the crown margin is fluid in form and follows contour of gingiva.

A

1

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7
Q

Surface is contoured in the gingival ___ of buccal, lingual, mesial and distal.

A

1/3rd

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8
Q

The crown is ___ at the gingival margins and tightly adapted to the tooth surface on buccal, mesial, lingual and distal.

A

crimped

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9
Q

What does the crown restore?

A

occlusion
contact (if present before procedure)
gingival health

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10
Q

T/F. A SSC is indicated to restore carious primary teeth that would otherwise require a large amalgam or composite restoration.

A

True.

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11
Q

T/F. SSCs are not used following a pulpotomy or pulpectomy.

A

False, it restores primary teeth following a pulpotomy or pulpectomy

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12
Q

T/F. SSCs restore teeth with HYPOplastic enamel.

A

True.

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13
Q

T/F. SSCs restore primary teeth with multiple carious lesions in patients with high decay rates who are at risk for recurrent caries.

A

True.

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14
Q

T/F. SSCs are not used in patients with hereditary anomalies, such as amelogenesis imperfecta and dentinogenesis imperfecta.

A

False, they are used in patients with hereditary anomalies

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15
Q

SSCs restore primary teeth as ___ for fixed appliances and provide ___ for removable appliances.

A

abutments; retention

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16
Q

SSCs provide ___ restoration for permanent molars and fractured teeth.

A

temporary

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17
Q

The ___ crown is a pre-trimmed, pre-contoured, and pre-crimped crown.

A

3M

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18
Q

T/F. With 3M crowns, trimming of the gingival margin is required but contouring and crimping is not necessary.

A

False, NO trimming of the gingival margin is required, although further contouring and crimping is sometimes necessary

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19
Q

T/F. The occlusal anatomy of 3M crowns are MORE prominent, with more secondary anatomy than you see on Unitek crowns.

A

True.

20
Q

___ crowns are NOT pre-contoured or pre-crimped. They are almost always at least ___-___mm too long and must be trimmed with crown and bridge scissors before contouring and crimping.

A

Unitek; 1-2

21
Q

Which crown type takes more time and expertise to place?

A

Unitek crowns

22
Q

The pediatric dentistry clinic stocks both crowns however, Unitek crowns are used most often.

A

False, 3M is used most often

23
Q

When evaluating the preoperative occlusion, what should be noted bilaterally?

A

the dental midline and the cusp-fossa relationship

24
Q

Where should local anesthesia be obtained?

A

lingual, palatal, buccal and lingual

25
Q

The gingival proximal margin should have a ___-___ finish line.

A

feather-edge

26
Q

T/F. Ledges formed by deep caries should NOT be removed.

A

True.

27
Q

T/F. All of the angles of the preparation should be rounded to remove corners so that you are left with a round preparation.

A

False, All of the angles of the preparation should be rounded to remove corners but NOT so much as to create a round preparation.

28
Q

What is the goal of crown selection?

A

to place the smallest crown that can be seated on the tooth and to establish pre-existing proximal contacts.

29
Q

How should the selected crown be tried onto the tooth?

A

by seating the lingual first and applying pressure in a buccal direction so that the crown slides over the buccal surface into the gingival sulcus.

30
Q

After seating the crown, how do you establish a preliminary occlusal relationship?

A

by comparing adjacent marginal ridge heights

31
Q

A properly trimmed crown will extend approximately ___mm into the gingival sulcus.

A

1

32
Q

What process involves bending the gingival one third of the crown’s margins inward to restore anatomic features of the natural crown and to reduce the marginal circumference of the crown, ensuring a good fit?

A

contouring

33
Q

How is the final close adaptation of the margin of the crown to the tooth surface achieved?

A

by crimping the cervical 1 mm of the margin circumferentially

34
Q

What three things does a tight marginal fit aid in?

A
  1. mechanical retention of the crown
  2. protection of the cement from exposure to oral fluids
  3. maintaining gingival health
35
Q

When removing the crown, a ___ or ___-___ can be used to engage the gingival margin and dislodge the crown.

A

spoon; cleoid-discoid

36
Q

What must be removed so that the crown may be replaced and occlusion may be checked?

A

rubber damn.

37
Q

T/F. Final smoothing and polishing of the crown margin should be performed after final cementation.

A

False, before final cementation

38
Q

How is smoothing performed?

A

it is begun with the heatless tone to create smooth, flowing curves and to thin the margin of the crown slightly. Rotation of the stone is toward and at 45 degree angle to the edge of the crown. A rubber wheel is used to remove surface scratches, using light, brushing strokes

39
Q

What cement is preferred?

A

a glass ionomer cement

40
Q

When reducing buccal and lingual surfaces due to a large cervical bulge or unusual contour of buccal or lingual, what should you remember?

A

do not destroy the natural undercut and all reduction must end with no ledge

41
Q

In what direction is a crown normally removed?

A

buccal to lingual

42
Q

If you are unsure on what size SSC to select, start with ___ or ___ (middle of size range).

A

4; 5

43
Q

Match the pliers with their numbers.

114
137
417

Gordon
johnson
crimping plier

A

114 (johnson)
137 (gordon)
417 (crimping plier)

44
Q

When seating adjacent crowns, increase the proximal reduction between SSCs ___mm between the teeth.

A

1.5

45
Q

What is the #1 mistake to avoid with SSCs?

A

prepping the wrong teeth

similarity of 2nd primary and 1st permanent molars

46
Q

What is the #2 mistake to avoid with SSCs?

A

gingival ledge

Pediatrics (9 decks)

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