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1. SBA > dental anomalies quiz > Flashcards

dental anomalies quiz Flashcards

1
Q

What is Oligodontia?

A

More than 6 missing teeth.

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2
Q

What is Anodontia?

A

Total lack of 1 or both dentitions.

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3
Q

True or False - In the primary dentition, it is most often seen that the maxillary lateral incisor is affected by hypodontia?

A

True

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4
Q

Name 4 syndromes most likely to be associated with hypodontia.

A
  1. Cleft lip and palate.
  2. Down Syndrome
  3. Ectodermal Displasia
  4. Oral facial digital syndrome.
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5
Q

Which syndrome do the following characteristics describe?

  • not a single disorder but a group of closely related conditions.
  • multiple missing teeth (hypodontia)
  • small conical teeth (microdontia)
  • thin sparse hair
  • dry skin
  • absence of sweating (heat intolerance)
  • retrusive hypopastic maxilla
  • x-linked hypohidrotic (worse in males), autosomal dominant/recessive
A

Ectodermal Dysplasia

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6
Q

Which term refers to submerged teeth?

A

Infraocclusion

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7
Q

List 4 descriptors of how hyperdontia teeth can appear.

A
  1. Supplemental (resemble normal teeth).
  2. Supernumerary (tubercular/conical).
  3. Anterior Maxilla Midline (mesiodens)
  4. Paramolars or Distomolars.
  5. Odontomes
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8
Q

Syndromes that hyperdontia may be associated with:

A
  1. Oral-facial digital syndrome.
  2. Gardeners Syndrome.
  3. Cleidocranial Dysplasia.
  4. Cleft Lip and Palate
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9
Q

True or False - around 1 in 3 supernumerary teeth will erupt.

A

True

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10
Q

Which syndrome is described:
- multiple supernumerary teeth
- autosomal dominant condition
- aplasia/hypoplasia of clavicles
- frontal and parietal bossing.
- delayed closure of anterior fontanelle
- delayed/failed permanent tooth eruption.

A

Cleidocranial Dysplasia

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11
Q

Describe the management of hyperdontia.

A
  1. Diagnose - delayed eruption, diastema.
  2. Investigate - palpate, take parallax radiographs.
  3. Treat - mesiodens erupt palatally; XLA and monitor incisor eruption.
  4. Refer - if continued failure of incisors to erupt.
  5. GDP - prevention & support.

aim to optimise treatment planning from an early age

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12
Q

True or False - Macrodontia is most likely to be generalised.

A

False - more likely to be localised.

Most commonly found in upper 1s and lower 5s.
Associated with fusion and germination.

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13
Q

What anomaly is associated with pituitary gigantism, unilateral facial hyperplasia and hereditary gingival fibromatosis?

A

Macrodontia

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14
Q

Describe germination.

A

1 tooth germ forming 2 teeth (normal tooth number)

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15
Q

What is hypercementosis?

A

Excessive buildup of cementum on the roots of 1 or more teeth.
Gives the tooth an enlarged appearance.

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16
Q

Chemotherapy, irradiation, orthodontic treatment can all potentially result in what abnormality?

A

Short Roots

17
Q

Which anomaly do these characteristics describe?

A

Dens Invaginatus

(also called odontome or dens in denote)

18
Q

What stage of tooth development is associated with dens invaginatus?

A

Morphodifferentiation

19
Q

True or False - there is a risk of rapid caries progression in invagination, followed by pulpal pathology.

A

True

20
Q

What anomaly is being described:

  • impacts morphodifferentiation
  • enlarged tooth body vertically
  • shorter roots
  • apically displaced furcation
  • late/failed invagination of hertwig’s root sheath
  • 6% mandibular permanent molars
  • associated with trisomy 21, ectodermal dysplasia and amelogenesis imperfecta
A

Taurodontism

21
Q

The most common microdont tooth.

A

Upper Lateral Incisor

22
Q

True or False - amelogenesis imperfecta affects only the permanent dentition.

A

False - affects all teeth in the permanent and primary dentition.

23
Q

Amelogenesis Imperfecta is inherited by which pattern of inheritance?

a. X-Linked
b. Sporadic
c. Autosomal Recessive
d. All of the above
e. Autosomal Dominant

A

D - although AI is typically characterised by the phenotype.

24
Q

Dentinogenesis Imperfecta is inherited by which pattern of inheritance?

A

Autosomal Dominant - one parent is most likely affected.

25
Q

Describe dentinogenesis imperfecta.

A

Pts present with opalescent grey/brown teeth which may have bulbous crowns.

Enamel may chip away leaving exposed dentine.

Pulp may show to be obliterated radiographically.

26
Q

What is the prevalence of hypodontia in the permanent dentition?

A

6.4%

27
Q

What is the cause of Taurodontism?

A

Late or failed invagination of Hertwigs Root Sheath

28
Q

3 conditions associated with Taurodontism

A

Trisomy 21 (down’s syndrome)

Ectodermal Dysplasia

Amelogenesis Imperfecta

29
Q

Name 2 potential common causes of localised enamel defects.

A
  1. Trauma
  2. infection
30
Q

Which gene is mutated in X Linked Amelogenesis Imperfecta?

A

AMLEX (amelogenin)

31
Q

Which gene is mutated when dentinogenesis imperfecta occurs by itself?

A

DSPP

32
Q

Which gene is mutated when dentinogenesis imperfecta occurs alongside osteogenesis imperfecta?

A

Type 1 Collagen

33
Q

Which condition causes Mulberry Molars and Hutchinson’s Incisors?

A

Congenital Syphilis

34
Q

What is Dens Invaginitis?

A

Invagination of the crown lined with enamel.

35
Q

What is the difference between type 1 and 2 dentinogenesis imperfecta?

A

type 1 - associated with osteogenesis imperfects, defective type 1 collagen.

type 2 - occurs by itself, defective DSPP.

36
Q

Which condition causes early exfoliation of teeth?

A

hyperphosphatasia - the condition with BLUE SCLERA.

(excess of alkaline phosphate in the blood)

37
Q

Between what weeks of development does Cleft Lip and Palate occur?

A

Weeks 6-12

38
Q

During which week does the dental lamina form?

A

Week 6

1. SBA (30 decks)

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