developmental disorders Flashcards

1
Q

caused by an abnormality in genetic makeup (genes and chromosomes)

A

inherited disorder

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2
Q

present at birth

may be inherited or developmental; the cause of most of these abnormalities is unknown

A

congenital disorder

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3
Q

an abnormal fluid-filled, epithelium-lined sac or cavity; found throughout the body, including the head and neck region; classified as to whether they are odontogenic or nonodontogenic

A

developmental cysts

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4
Q

forms around crown of unerupted or developing tooth; epithelial lining originates from the reduced enamel epithelium after crown has formed and calcified; most commonly around the crown of unerupted or impacted third molar

A

dentigerous cyst(follicular cyst)

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5
Q

odontogenic cyst around crown of unerupted tooth; circumscribed unilocular lesion; involved tooth may be displaced; mand. 3rd molars; cortical expansion; surgical enucleation and extraction

A

dentigerous cyst

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6
Q

found in the soft tissue around the crown of an erupting tooth; extraosseus

A

eruption cyst

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7
Q

develops in the place of a tooth; third molar; originates from remnants and degeneration of enamel organ; tooth was never present

A

primordial cyst

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8
Q

characterized by histologic appearance and frequent recurrence; most often seen in mandibular third molar region; can move teeth and cause resorption; high recurrence rate**

A

odontogenic keratocyst

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9
Q

nonaggressive cystic lesion lined by odontogenic epithelium; closely resembles ameloblastoma; ghost cells

A

calcifying odontogenic cyst

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10
Q

most often seen in mandibular canine and premolar area; radiolucent lesion on lateral surface of a tooth; intraosseous; developmental cyst between the roots of adjacent teeth; may cause divergence of roots; between mandibular pm and max lateral incisor and canine

A

lateral periodontal cyst

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11
Q

small bulge or swelling of attached gingiva or interdental papillae; extraosseous

A

gingival cyst

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12
Q

located within nasopalatine canal or incisive papilla; small pink bulge near apices between roots of max central on lingual surface; heart shaped; teeth are vital

A

nasopalatine canal cyst(incisive canal cyst)

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13
Q

arises from embryologic remnants of nasopalatine duct; teeth are asymptomatic and vital

A

nasopalatine canal cyst

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14
Q

well defined unilocular radiolucency; located in midline of hard palate; found more posterior than nasopalatine duct cyst; posterior to palatal rugae

A

median palatine cyst

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15
Q

well defined pear shaped radiolucency found between roots of max lateral incisor and canine; ; can cause divergence of roots

A

globulomaxillary cyst

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16
Q

rare lesion located in midline of mandible; below apices of mandibular incisors

A

median mandibular cyst

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17
Q

soft tissue cyst; thought to originate from lower anterior portion of nasolacrimal duct; 40 to 50,year old females; expansion or swelling in mucobuccal fold in area of max canine and floor of nose

A

nasolabial cyst

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18
Q

appears to arise from epithelium trapped in lymph node during development; intraorally on floor of mouth and lateral borders of tongue(appears pinkish-yellowish raised nodule); seen extraorally on lateral neck at anterior border of scm

A

branchial cleft cyst(intraoral lymphoepithelial cyst

19
Q

a raised nodule on the skin of face or neck ; lumen is usually filled with keratin scales; lined by keratinizing epithelium that resembles the epithelium of skin

A

epidermal cyst

20
Q

a developmental cyst often present at birth or noted in young children; usually found on floor of mouth when it is located in oral cavity; may have doughy consistency when palpated; lumen filled with keratin; hair follicles, sebaceous glands, and sweat glands may be seen in cyst wall

A

dermoid cyst

21
Q

what resembles a dermoid cyst

A

benign cystic teratoma

22
Q

forms along tract the thyroid gland follows in development; often found in young individuals under 20; patients may complain of dysphagia or difficulty when extending tongue

A

thyroglossal tract cyst

23
Q

static bone cyst is also called

A

lingual mandibular bone cavity; stafne bone cyst

24
Q

a pseudocyst; posterior region of mandible inferior to the mandibular canal(inferior alveolar canal); lingual depression is filled with normal salivary gland tissue; circumscribed unilocular radiolucency

A

static bone cyst

25
Q

a simple bone cyst is also called

A

traumatic bone cyst

26
Q

well defined unilocular or multilocular radiolucency; shows scalloping around roots of teeth; premolar/molar area of mandible; young adults– teeth are vital; asymptomatic

A

simple bone cyst

27
Q

consists of blood filled spaces surrounded by multinucleated giant cells and fibrous CT; honey comb/soap bubble appearance; persons less than 30 females; pseudocyst

A

aneurysmal bone cyst

28
Q

an accessory cusp located in the cingulum area of maxillary or mandibular permanent incisor

A

talon cusp

29
Q

bull teeth; long crown length/apically displaced furcations; can be associated with downs or klinefelters syndrome; common in eskimos and middle easterners

A

taurodontism

30
Q

tooth cementum fused to bone; pdl space is lacking;tooth appears submerged and has a different sound when percussed(kind of a dull thud)

A

ankylosed teeth

31
Q

cannot erupt due to an obstruction

A

impacted teeth

32
Q

do not erupt due to lack of eruptive force

A

embedded teeth

33
Q

an accessory enamel cusp found on the occlusal tooth surface

A

dens envaginatus

34
Q

most common missing permanent teeth

A
  1. maxillary lateral incisor
  2. mandibular second premolars
  3. mandibular and maxillary third molars
35
Q

what is the most common supernumerary tooth

A

mesiodens

36
Q

is the pdl space lacking in ankylosed teeth

A

yes

37
Q

tooth appears submerged and has a different sound when percussed(dull thud)

A

ankylosed teeth

38
Q

one or several teeth in same quadrant exhibit a marked reduction in radiodensity and a characteristic ghostlike appearance; very thin enamel and dentin are present; involved enamel, dentin, and cementum

A

regional odontodysplasia(ghost teeth)

39
Q

a developmental anomaly resulting in a disturbance of the maturation of the enamel matrix; chalky, white spot on middle third of smooth crowns; underlying enamel may be soft and susceptible to caries

A

enamel hypocalcification

40
Q

is hutchinsons incisors and mulberry molars a form of enamel hypoplasia?

A

yes

41
Q

is turner tooth a form of enamel hypoplasia resulting from local infection or trauma?

A

yes

42
Q

ingestion of water with 2 to 3 times the recommended amount of fluoride leads to white flecks and

A

chalky opaque areas of enamel

43
Q

ingesting four times the recommended amount of fluoride causes

A

brown or black staining