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Neville and Damm > Ch 2 - Abnormalities of Teeth 2 > Flashcards

Ch 2 - Abnormalities of Teeth 2 Flashcards

1
Q

How much of the tooth root is formed when emergence through the gingiva occurs?

A

2/3s of the root is developed

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2
Q

What are 3 “local” conditions associated with delayed eruption?

A
  1. supernumerary teeth 2. Regional odontodysplasia 3. Segmental Odontomaxillary Dysplasia
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3
Q

What are 3 “systemic” conditions associated with delayed eruption?

A
  1. Anemia 2. Celiac Dz 3. Cerebral palsy
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4
Q

Some authors subdivide these non-erupted teeth into those that are obstructed by a physical barrier (impacted) and those that appear to exhibit a lack of eruptive force (________).

A

embedded

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5
Q

Impaction of deciduous teeth is extremely rare, when it is seen which teeth are most likely involved? What pathologic process is most commonly the cause?

A

second molars…ankylosis

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6
Q

HOLY S! One review of 2646 pericoronal lesions submitted to an active oral pathology service revealed that ___% of cases had pathologically significant lesions! A good reason to get them taken out…

A

32.9%

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7
Q

infraocclusion, secondary retention, submergence, reimpaction, and reinclusion are all terms for:

A

ankylosis

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8
Q

What is the most common tooth to have ankylosis?

A

mandibular primary first molar

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9
Q

What is the difference between hypodontia and oligodontia?

A

Hypo: 1 or more teeth…Oligo: 6 or more teeth excluding 3rd molars

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10
Q

How many genes are involved in odontogenesis?

A

more than 200

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11
Q

What are the 7 implicated genes in hypodontia?

A
  1. PAX9
  2. MSX1
  3. AXIN2
  4. He-Zhao
  5. LTBP3
  6. EDA
  7. WNT10A
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12
Q

What are 5 syndromes (out of 39) associated with hypodontia?

A
  1. Down 2. Ectodermal Dysplasia 3.Ehlers-Danlos 4.Gorlin 5.Otodental dysplasia
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13
Q

What are 5 syndromes (out of 20) associated with hyperdontia?

A
  1. Apert 2. Cleidocranial Dysplasia 3.Gardner 4.Down 5. Leopard
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14
Q

Failure of teeth to form is one of the most common dental developmental abnormalities, with a reported prevalence of ___-___% in permanent teeth when absence of third molars is excluded. The prevalence increases to __% if third molars are considered.

A

3% to 10%…20%

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15
Q

Hypodontia gender predominance?

A

A female predominance of approximately 1.5 : 1 is reported.

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16
Q

Anodontia is rare with most cases arising from which condition?

A

hereditary hypohidrotic ectodermal dysplasia

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17
Q

Which 3 teeth are LEAST likely to be congenitally missing?

A

max central incisors, mand first molars, mand canines

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18
Q

In the deciduous dentition, 90% of missing teeth involve the _______ and _______

A

maxillary lateral incisors and mandibular incisors

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19
Q

Mutation of the PAX9 gene creates an ___ pattern of oligodontia that can involve various teeth but most commonly affects WHICH TEETH?

A

AD…permanent molars

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20
Q

Mutation of the MSX1 gene also is inherited as an
_____ trait. Those affected with this mutation
tend to demonstrate loss of the distal tooth of each
type, with more severely affected individuals also revealing anterior progression of the agenesis. In these patients, the most commonly missing teeth are the ________ and _______

A

AD…second premolars and third molars

21
Q

Which hypodontia gene mutation is associated with and average of approximately 12 missing teeth?

A

MSX1

22
Q

Which hypodontia gene deficiency was discovered in a large kindred from northwest China?

A

He-Zhao

23
Q

Which hypodontia gene mutation was discovered in a Pakistani lineage?

A

LTBP3

24
Q

The _____ gene is associated with a nonsyndromic X-linked pattern of hypodontia, which primarily affects the maxillary and mandibular central incisors, lateral incisors, cuspids, and premolars.

A

EDA (ANTERIOR TEETH most affected)

25
Q

Hypodontia associated with nonsyndromic mutation
of the _____ gene appears limited to maxillary and
mandibular lateral incisors and second premolars…weird

A

WNT10A

26
Q

*Which hypodontia gene mutation is associated with adenomatous polyps and colorectal carcinoma?

A

AXIN2

27
Q

Percent range of supernumerary teeth in whites? What race has a slightly higher percentage? Which race has a significantly higher rate compared to whites?

A

0.1-3.8%…Asian…American blacks: up to 9x more than whites

28
Q

Single-tooth hyperdontia occurs more frequently
in the permanent dentition, and approximately
95% present in the ______ region.

A

maxillary anterior

29
Q

Unlike hypodontia, hyperdontia is positively correlated with ________ and exhibits a 2 : 1 ____ predominance.

A

macrodontia…male

30
Q

A supernumerary tooth in the maxillary anterior incisor region is termed a ?

A

mesiodens

31
Q

What are the two names for an accessory fourth molar?

A

distomolar or distodens

32
Q

A posterior supernumerary tooth situated lingually or buccally to a molar tooth is termed a ?

A

paramolar

33
Q

Supernumerary teeth are divided into _________

(normal size and shape) or ________ (abnormal shape and smaller size) types

A

supplemental (normal size and shape)….rudimentary (abnormal shape and smaller size

34
Q

What are the 3 descriptive terms for rudimentary supernumerary teeth?

A
  1. conical (small, peg-shaped) 2. tuberculate (barrel-shaped anterior with more than one cusp) 3.molariform (small premolar-like or molarlike)
35
Q

One of my new favorite Oral Path terms: On rare occasions, an affected patient can present with
both hypodontia and hyperdontia - termed _______. Whats the pattern?

A

hypohyperdontia…missing mandibular incisors followed by second premolars; in contrast, supernumeraries in
anterior maxilla followed by supplemental canines or
maxillary premolars

36
Q

What is the term for a normal tooth that erupts in an abnormal location? (e.g. canine erupting between two premolars)…Which is associated with this - hyper or hypodontia?

A

dental transposition..associated with hypodontia

37
Q

Teeth present in newborns have been called
______ teeth; those arising within the first 30 days of life are designated ______ teeth - but now all should just be called ______

A

natal…neonatal…all should be called NATAL teeth

38
Q

What is the most common natal tooth?

A

mand ant incisior

39
Q

Patients with _______ exhibit an

increased prevalence of orthodontics-associated external root resorption.

A

oligodontia

40
Q

What is the term for traumatic ulcerations of the adjacent soft tissue that occur during breast feeding?

A

Riga-Fede disease

41
Q

Microdontia is associated strongly with _____dontia

A

hypodontia

42
Q

macrodontia often is seen in association with _____dontia

A

hyperdontia

43
Q

Which gender demonstrates a higher frequency of microdontia and hypodontia?

A

Female

44
Q

Which gender has agreater prevalence of macrodontia and hyperdontia?

A

male

45
Q

What are the 2 disorders associated with diffuse, true microdontia?

A
  1. Down syndrome 2.pituitary dwarfism
46
Q

What is the inheritance pattern and percent range of prevelence for isolated microdontia of the max lat incisor (peg lateral)?

A

0.8-8.4%, AD

47
Q

5 disorders associated with diffuse MACROdontia

A
  1. pituitary gigantism 2.otodental syndrome 3.XYY males 4. pineal hyperplasia with hyperinsulinism 5. Hemifacial hyperplasia
48
Q

Isolated macrodontia is reported to occur most frequently in which teeth?

A

incisors or canines

Neville and Damm (72 decks)

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