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Y3T3 Orthodontics > Transverse Malocclusions > Flashcards

Transverse Malocclusions Flashcards

Professor Vaid

1
Q

Examples of Transverse Malocclusions

A
  1. Facial asymmetry
  2. Crossbites (Maxillary lingual or maxillary buccal)
  3. Midline deviation
  4. Lateral functional shift
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1
Q

Aetiology of Facial Asymmetry

A
  1. Skeletal
  2. Soft tissue
  3. Combination
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2
Q

Features of Facial Asymmetry

A
  1. Max and mand OR only mand asymmetry
  2. Localise problem to condyle, body, ramus or combination
  3. Transverse cant in occlusal plane
  4. Midline deviation
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3
Q

Types of Skeletal Asymmetry

A

Unilateral Excess Growth

  1. Unilateral Condylar Hyperplasia
  2. Hemimandibular elongation
  3. Hemimandibular hyperplasia

Unilateral Deficiency

  1. Unilateral deficient condylar growth
  2. Unilateral deficient condylar resorption
  3. Hemifacial microsomia
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4
Q

Definition of Crossbite

A

Discrepancy in buccolingual relationship of upper and lower teeth

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5
Q

Skeletal Causes of Mandibular Buccal Crossbite

A

Absolute Transverse Discrepancy

  1. Maxillary constriction
  2. Wide mandible
  3. Combination

Relative Transverse Discrepancy

  1. AP relationship between maxilla and mandible

Skeletal Asymmetry

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6
Q

Soft Tissue Causes of Mandibular Buccal Crossbite

A
  1. NNS which constrict maxillary arch due to increased lingual pressure from buccinators and decreased buccal pressure from lowered tongue
  2. Macroglossia
  3. Mouth breathing?
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7
Q

Dental Causes of Mandibular Buccal Crossbite

A

Displacement/rotation/inclination of tooth

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8
Q

Other Causes of Mandibular Buccal Crossbite

A
  1. Cleft palate
  2. Lateral functional shift due to single tooth interference or arch width discrepancy
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9
Q

Skeletal Causes of Scissors Bite

A
  1. Absolute transverse discrepancy
  2. Relative transverse discrepancy
  3. Skeletal asymmetry
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10
Q

Dental Causes of Scissors Bite

A

Displacement/rotation/inclination

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11
Q

Causes of Facial Midline Deviation

A
  1. Skeletal asymmetry
  2. Lateral functional shift
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12
Q

Causes of Dental Midline Deviation

A
  1. Crowding, misalignment, tooth displacement (early loss of C caused drifting of incisors)
  2. Missing teeth
  3. Irregularly sized teeth (peg laterals)
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13
Q

Management not done yet

A
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Y3T3 Orthodontics (11 decks)

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