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Oral anatomy > Dental Anomalies > Flashcards

Dental Anomalies Flashcards

1
Q

What is a dental anamoly?

A

A deviation from normal, related to embryonic development

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2
Q

What is anodontia?

A

Absence of teeth, there is total and partial

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3
Q

What are three most common missing adult teeth?

A

Third molars (especially maxillary), maxillary lateral incisors (1-2% of pop.), and mandibular second premolars (1%)

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4
Q

Where do supernumerary teeth commonly occur

A

Permanent dentitions and 90% of the time in maxillary arch

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5
Q

What are the three most common areas for supernumary teeth?

A

A.maxillary incisor area
B.third molar area
C.mandibular premolar area

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6
Q

What is a mesiodens?

A

An extranumary tooth that is located in the midline between 8 and 9

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7
Q

What is a common abnormality that affects tooth numbers 7 and 10?

A

Peg-shaped maxillary lateral incisor

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8
Q

What happens if the maxillary central incisors only develops from one tooth lobe?

A

Peg shaped maxillary central incisors

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9
Q

What is gemination?

A

(Twinning); one crown double in width; one root, one pulp chamber and canal.

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10
Q

What is fusion?

A

Two adjacent crowns fuse and appear double in width (two roots, two pulp chambers and canals)

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11
Q

What disease can give rise to Hutchinson’s incisors and what do these teeth look like?

A

Congenital syphilis, these teeth look like screw drivers

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12
Q

Aside from Hutchinson’s incisors what dental abnormality can arise from congenital syphilis?

A

Mulberry molars

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13
Q

What is a tuberculum intermedium?

A

Third (middle) lingual cusp on mandibular molars

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14
Q

What is a talon cusp?

A

This is a lingual projection on incisors in the shape of a talon

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15
Q

What are the two terms for the variation in tooth size?

A

Macrodontia and microdontia

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16
Q

Macrodontia typically affects what teeth?

A

Incisors and canines

17
Q

Microdontia generally affects what teeth?

A

Maxillary lateral incisors and third molars

18
Q

In what ethnic races are shovel shaped maxillary incisors prominent?

A

Common in American indians, asian, mongoloid, and eskimos

19
Q

What is dilaceration?

A

Severe bending of the tooth root

20
Q

What are enamel pearls?

A

Spheres of enamel found typically on the furcation area of teeth

21
Q

What is taurodontia?

A

Bull tooth, this root is blunted, also there is no constriction of the pulp chamber into a canal

22
Q

What is dens in dente?

A

Tooth within a tooth

23
Q

What is hypercementosis and what is the cause?

A

Thickening of cementum and this arises from trauma or metabolic dysfunction

24
Q

What is concresence of roots?

A

Joining of cementum of adjacent teeth after eruption

25
Q

What is transposition?

A

“Switching” in the places of adjacent teeth

26
Q

What is ankylosis?

A

Loss of periodontal ligament, root fused to the bone

27
Q

What are the 4 etiologies of enamel dysplasia?

A

Amelogenesis imperfecta, fluorosis, enamel damage from high fever, focal hypermaturation

28
Q

What are the two etiologies of dentin dysplasia?

A

Dentinogenesis imperfecta and tetracycline stain

29
Q

What is another name for focal enamel hypoplasia?

A

Truner’s tooth, comes from trauma or infection

30
Q

What does biliary atrisia look like?

A

Green bands that are present in the teeth and come from bile

31
Q

What is attrition?

A

Wear of enamel and dentin due to opposing tooth contact (bruxism)

32
Q

What is abrasion?

A

Wear of tooth structure by mechanical means (tooth brush, tooth pick, etc)

33
Q

What is abfraction?

A

Bending of tooth due to heavy occlusion with enamel chipping off at cervical

34
Q

What is erosion?

A

Wear of tooth structure due to chemical agents (citric acid, bulimic patients, etc)

Oral anatomy (4 decks)

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