Impacted Teeth Flashcards

1
Q

Most commonly impacted Teeth

A
  • Third molars
  • Maxillary Canines
  • Mandibular premolars
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2
Q

Teeth become impacted due to

A

Lack of space

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3
Q

Classification of Third molar impaction

A
  • Winters classification
  • Pell and Gregory classes/levels
  • Pederson’s difficulty index
  • Modified Parant scale
  • Wharfe assessment by McGregor
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4
Q

Winters classification

A

Angulation of the teeth

  • Mesioangular
  • Horizontal
  • Vertical
  • Distoangular
  • Inverted
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5
Q

Pell and Gregory Classes

A
  • Based on relationship between third molar and ramus
  • Class 1→ Crown anterior to ramus
  • Class 2→ Crown is partially in ramus
  • Class 3→ Tooth in ramus
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6
Q

Pell and gregory levels

A
  • Measures degree of overlying bone
  • Level A→ Occlusal planes level
  • Level B→ Occusal plane half way between second molar
  • Level C→ Occlusal plane below cervical line
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7
Q

Pederson’s difficulty index

A
  • Measure difficulty by angulation, occlusal height and space→ Value assigned
  • Low accuracy→ doesn’t take into account other factors(mouth opening, bone density ect)
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8
Q

Modified Parant scale

A

Difficulty index

  • Easy 1→ forceps
  • Easy 2→ osteotomy

Difficult 3→ osteotomy and coronal section(crown and root removed separately)

Difficult 4→ Root sectioning

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9
Q

Winter war lines

A

-White lines → Occlusal plane

Yellow line→ Height of bone level

Red line→ Point of elevator application

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10
Q

Wharfe assessment by McGregor

A

Difficulty index

  • Angulation
  • Height of bone
  • Root shape
  • Follicle development
  • Path of exit
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