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SP16- Operative > Treating Class II Caries > Flashcards

Treating Class II Caries Flashcards

1
Q

Class 2 caries involve the ______ surface of ____ teeth.

A

proximal

posterior

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2
Q

Radiographic exams are an adjunct to clinical examination. How often are anterior radiographs needed?

A
  • every 5 years as part of Full mouth series

- on an individual basis as needed based on symptoms

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3
Q

How many radiographs are in a full mouth series? How many bitewings?

A

8 posterior PA’s, 4 bitewings, 7 anterior PA’s, 1 pano = 20

4

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4
Q

How often are bitewings taken?

A

every 2 years ( more frequently if caries are high)

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5
Q

Give a method that can assist with clinical examination of caries.

A

transillumination

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6
Q

How do proximal caries appear clinically?

A

opaque white

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7
Q

Deciding whether or not to treat caries will depend on direct evidence and clinical _______.

A

judgement

  • past caries experience
  • rate of caries progression
  • location and surrounding teeth
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8
Q

What are the possible consequences of the “decision to treat” caries?

A
  • damage to adjacent teeth (especially with small preps)
  • restorations have limited lifetime (all eventually fail)
  • weakening of the remaining tooth structure
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9
Q

What are the three approaches for class 2 preparations? Which is most common? Which is used more often for root caries?

A
  1. Occlusal
  2. Facial
  3. Lingual
  • Occlusal is most common
  • Root caries: Facial or Lingual because the FGM recedes and provides better access and maintains the marginal ridge.
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10
Q

True or False: The marginal ridge must be removed for the occlusal approach to class 2 preparation.

A

True

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11
Q

True or False: The occlusal approach removes significant amounts of unaffected dentin.

A

True

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12
Q

For a conventional Box-Only preparation, start in the center of the B-L width of the contact area, then move the bur in a direction _________ to the proximal surface.

A

perpendicular (parallel to enamel rods)

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13
Q

For the box of a class 2 preparation, which contact is usually left much tighter? What is the minimal clearance amount (ideal)?

A

buccal

0.5 mm (or extend to encompass all affected dentin)

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14
Q

For retention, the box _______ occlusally.

A

converges

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15
Q

True or False: Retention grooves may be placed to aid in retention and resistance.

A

True

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16
Q

What is the “primary function” of the matrix band?

A

restore anatomic contour and contact

by acting as a “form” into which the material is placed

17
Q

The open face of the matrix band clamp is placed ______ the gingival sulcus.

A

toward

18
Q

What is placed after the matrix band, prior to amalgam placement?

A

WEDGE

  • adapts to gingival area
  • prevents extrusion of material
  • slightly opens contact
19
Q

True or False: For proper amalgam placement, a coronal force is required to properly adapt into retentive groves.

A

False, need LATERAL forces to adapt into grooves

20
Q

The ______ must be carved down prior to removal of the matrix band. Why?

A

marginal ridge

  • form the embrasure
  • create a MR height similar to adjacent tooth
21
Q

What are the three steps in initial tooth preparation?

A
  1. Outline Form & Initial Depth
  2. Primary Resistance Form
  3. Primary Retention Form

(“s” before “t”…resistance before retention)

22
Q

Which “form” prevents movement during occlusal forces?

A

resistance form (oblique and apical movement, occlusal)

23
Q

For step one of tooth preparation (Outline/depth), where do you place the margins? What is the initial depth?

A

-margins placed where they will be in the final prep
-initial depth = 0.2-0.8mm into dentin
(axial PM: 1 mm, axial molar: 1.5mm, gingival: 3mm)

24
Q

What is the difference between a conventional Class II amalgam and conventional Class II composite?

A

similar preparations

However…the walls for a composite can be more parallel and breaking contact on the buccal wall is not required

25
Q

What is the best Base material to use under composite?

A

Glass Ionomer

26
Q

True or False: ZOE cannot be used as a base with a composite restoration.

A

True, messes with the bond

27
Q

What is the best/most common liner used under amalgam?

A

copal varnish

28
Q

What is the most common liner used under composite in the OSU Clinics?

A

Gluma

29
Q

Which material is commonly used for direct and indirect pulp capping?

A

Calcium Hydroxide

30
Q

True or False: Glass Ionomer can be used as an indirect pulp cap.

A

True

SP16- Operative (8 decks)

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