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3rd yr- CSB- Labs- Extra coronal restorations > Anterior Metal Ceramic Crown > Flashcards

Anterior Metal Ceramic Crown Flashcards

1
Q

What are we aiming to achieve when preparing for an anterior MCC

A
  1. Chamfer
  2. Wing
  3. Incisal notch
  4. Shoulder
  5. Axial redcution
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2
Q

What principles do we need to follow when preparing an anterior MCC

A
  1. Allow adequate room for sufficient thickness of metal and porcelain
  2. Have retention and resistance forms
  3. No undercuts
  4. Margins supra-gingiva where possible
  5. Chamfer margin for metal
  6. Shoulder margin for metal+ porcelain
  7. Be as conservative as possible
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3
Q

Name the ideal metal used for MCC

A

Gold

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4
Q

Why is gold the ideal metal for an anterior MCC

A

As it gives longevity

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5
Q

What are the drawbacks of using gold for an anterior MCC

A

Bonding may not be as good as composite systems

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6
Q

How much space does an anterior MCC need

A
  1. 2mm
  2. 5 for the metal
  3. 2 For opaque porcelain
  4. 5 for porcelain
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7
Q

How much incisor reduction are we aiming to achieve?

A

2mm

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8
Q

How many planes does the labial reduction need?

A

2 plane reduction

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9
Q

Name the 2 planes we are aiming to achieve during labial reduction

A
  1. One plane closest to the gingival Margin

2. 2nd plane closer to the incisal edge

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10
Q

How do we carry out labial reduction

A

We keep our burr parallel to the axis of the tooth initially
We follow the 2 planes of the labial side

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11
Q

How many mm do we need to prepare the shoulder margin by?

A

1.2mm

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12
Q

What do we use to repave the shoulder margin

A

The should burr

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13
Q

Overall how much reduction do we need on each side of the tooth

A

Buccal: 1.2-1.5mm reduction
Incisal tip: 2mm reduction
Palatal side: 0.5-0.7mm

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14
Q

What is the purpose of an anterior MCC

A
  1. To protect the weakened tooth
  2. To restore the tooth to function
  3. To improve aesthetics
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15
Q

What does a chamfer provide in an anterior MCC prep

A

Marginal integrity

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16
Q

What does a shoulder provide in an anterior MCC prep

A

Marginal integrity and structural durability

17
Q

What does a wing provide in an anterior MCC prep

A

Retention and resistance

Preservation of tooth structure

18
Q

What does an incisal notch provide in an anterior MCC prep

A

Structural durabilty

19
Q

What does axial reduction provide in an anterior MCC prep

A

Retention and resistence

Structural durability

20
Q

What should we use to carry out incisal reduction

A

a shoulder bur, fine needle bur or even a chamfer bur

21
Q

What can we use to check the extent of our incisal reduction

A

Check with the small end of a packer (1.5mm)

3rd yr- CSB- Labs- Extra coronal restorations (6 decks)

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