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Orthodontics IV > Revision-Hypodontia and Orthodontics > Flashcards

Revision-Hypodontia and Orthodontics Flashcards

1
Q

Definition

A

“Hypodontia is the developmental absence of one or more deciduous or permanent teeth , excluding the third molars.”

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2
Q

Hypodontia is classified based on severity:

A
  • Mild hypodontia: 1 or 2 missing teeth
  • Moderate hypodontia: 3 to 6 missing teeth
  • Severe hypodontia/ oligodontia : more than 6 missing teeth
  • Anodontia : complete absence of teeth in one or both dentitions
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3
Q

Prevalence according to type of hypodontia

A
  • More than 80% of people affected have mild hypodontia.
  • 10% or less have moderate hypodontia.
  • Less than 1% have severe hypodontia.
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4
Q

Etiology

A
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5
Q

Frequency of missing teeth in Caucasians

A
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6
Q

Syndromes associated with hypodontia

A
  1. Cleft lip and palate
  2. Ectodermal dysplasias
  3. Oral-facial-digital syndromes
  4. Incontinentia pigmenti
  5. Down syndrome
  6. Wiktop syndrome
  7. Van der Woude syndrome
  8. Ehlers-Danlos syndrome
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7
Q

Features of Hypodontia

Dental anomalies commonly associated with hypodontia

A
  1. Hypoplastic enamel
  2. Ectopic maxillary canine tooth position
  3. Microdontia–localized or generalized, may affect crown or root
  4. Molar taurodontism
  5. Conical crown shape, such as peg shaped lateral incisors
  6. Transposition, particularly between the maxillary canine and first premolar
  7. Supernumerary teeth
  8. Infra-occlusion of retained primary teeth
  9. Delayed eruption of teeth.
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8
Q

Dx

HISTORY – CLINICAL EXAMINATION

A
  1. Abnormalities in the eruption of teeth
  2. Prolonged retention of deciduous teeth
  3. Inconsistencies in eruption timing between contralateral teeth more than 6 months
  4. Deviation from the normal eruption sequence
  5. Generalized delay in dental development
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9
Q

Dx

RADIOGRAPHIC EXAMINATION

A

Panoramic radiograph

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10
Q

IMPACT OF HYPODONTIA

IMPACT OF UNTREATED HYPODONTIA

A
  • Hypodontia can affect everyday activities.
  • It has been shown to reduce quality of life for those affected due to detrimental effects on appearance, function, and psychosocial well-being .
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11
Q

HYPODONTIA

Aims of treatment

A

To satisfy the needs of each growth period

  • Mastication – nutrition
  • Esthetics
  • Psychological well-being

To establish optimum background for the final rehabilitation

  • Abnormal maxillofacial growth pattern is anticipated due to genetic predisposition and lack of teeth.
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12
Q

HYPODONTIA-Tx

Protocol structure: 3 successive stages

A
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13
Q

Tx

1st (introductory) stage

extra

A

First interim prosthesis:
Usually removable partial or complete denture

  • Simple, conservative, adaptable and replaceable
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14
Q

Tx

2nd stage

extra

A
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15
Q

Tx

3rd stage

extra

A
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16
Q

Definite Tx Plan

extra

A

Orthodontics IV (23 decks)

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