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Periodontics III > 6. Furcations > Flashcards

6. Furcations Flashcards

1
Q

Which maxillary molar has a shorter root trunk?

A

1st molar

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2
Q

In the 1st molar where is the mesial furcation entrance located?

A

3mm from the CEJ

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3
Q

In the 1st molar where is the distal furcation entrance located?

A

5mm apical to the CEJ

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4
Q

Which maxillary furcation entrance is the narrowest?

A

Buccal

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5
Q

In the 1st molar where is the buccal furcation entrance located?

A

3.5mm from the CEJ

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6
Q

Is the mesial furcation entrance of the maxillary first molar closer to the palatal or buccal tooth surface?

A

Palatal

  • The distal furcation entrance is generally located midway between the buccal and palatal surfaces.
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7
Q

What probe is used for the diagnosis of furcations?

A

Nabers

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8
Q

What is a Glickman Grade I furcation called?

A

Incipient

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9
Q

What is a Glickman Grade II furcation called?

A

Cul-de-sac

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10
Q

What is a Glickman Grade III furcation called?

A

Through and through

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11
Q

What is a Glickman Grade IV furcation called?

A

Through and through which is visible clinically

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12
Q

In a Grade I furcation the buccal furcation can be probed to what depth?

A

< 3mm

  • Minimal bone loss
  • Suprabony pocket
  • Can feel the depression of the furcation opening
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13
Q

In a Grade II Furcation to what depth can the probe be penetrated?

A

Permits only partial penetration of a probe

  • Bone destroyed on one or more aspects of the furcation, but a portion of the alveolar bone and the PDL remains intact.
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14
Q

What is the average length of a root trunk?

A

3-6mm

  • Distance from CEJ to the furcation entrance
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15
Q

Order the furcation entrances of the maxillary molars from widest to narrowest.

A

Mesial > Distal > Buccal

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16
Q

Which furcation entrance of mandibular molars is the widest?

A

Buccal > Lingual

17
Q

What percent of root concavities measure 0.5-0.7mm?

A
  • Maxillary Molars
    • 94% MB roots
    • 31% DB roots
    • 17% Palatal roots
  • Mandibular Molars
    • 100% Mesial roots
    • 99% Distal roots
18
Q

What are flat, ectopic extensions of enamel beyond the CEJ?

A

Cervical Enamel Projections

  • Can affect plaque removal, complicate SRP and may be local factor in the development of gingivitis and periodontitis
19
Q

What teeth/tooth are cervical enamel projections present on > 90%?

A

Isolated mandibular bifurcation involvement

20
Q

What are some treatment options for furcation involvement? (3 of the 11 possible)

A
  • Root Resection
  • Hemisection
  • Tunneling
    • If surgical outcomes are not great, create a Grade 4 Furcation

Periodontics III (6 decks)

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