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Biomedical Science 1 > Tooth Morphology 1 > Flashcards

Tooth Morphology 1 Flashcards

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1
Q

What is the palatal region of the mouth?

A

Surface of the maxillary tooth which faces the palate

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2
Q

What is the lingual region of the mouth?

A

Surface of the mandibular tooth which faces the tongue

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3
Q

What is the labial region of the mouth?

A

Surface of the incisors and canines facing the lips

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4
Q

What is the buccal region of the mouth?

A

Surface of the pre molars and molars facing the cheek

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5
Q

What is mesial in terms of the oral cavity?

A

Surface of the tooth which faces towards the midline of the dental arch

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6
Q

What is distal in terms of the oral cavity?

A

Surface of the tooth which faces away from the midline of the dental arch

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7
Q

What is the occlusal surface of a tooth?

A

The biting surface of a molar or premolar

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8
Q

What is the incisal margin of a tooth?

A

The cutting edge of an incisor or canine

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9
Q

What is a cusp?

A

Pronounced elevation on the occlusal surface of a tooth

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10
Q

What is a tubercle?

A

A small elevation on the crown of a tooth

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11
Q

What is the cervical margin?

A

Surface above the junction of the crown and root

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12
Q

What is cingulum?

A

A bulbous convexity near the cervical region of a tooth

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13
Q

What is a ridge?

A

Any linear elevation on the tooth surface

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14
Q

What is a marginal ridge?

A

A ridge at the mesial or distal edge of the occlusal surfaces of molar and premolars

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15
Q

What is a fissure?

A

A long cleft between cusps or ridges

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16
Q

What is a fossa?

A

A rounded depression on a tooth’s surface

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17
Q

What are contact points?

A

Distal surface of one tooth abuts firmly to the mesial surface of the adjacent tooth

18
Q

What maintains contact points?

A

Mesial drift

19
Q

What is mesial drift?

A

The tendency for teeth to move in a mesial direction

20
Q

What can occur if contact points are lost?

A

Food can become impacted between teeth

21
Q

What is the importance of marginal ridges?

A

Push food into occlusal surfaces

22
Q

What 3 things cause variation in tooth morphology?

A
  1. Age
  2. Disease
  3. Developmental anomalies or defects
23
Q

What 4 tooth morphology variations occur with age?

A
  1. Attrition on tooth surface
  2. Receding gingiva
  3. Cementum thickness increases
  4. Teeth become darker in colour
24
Q

What is an example of a local disease of the oral cavity?

A

Caries

25
Q

What is a neonatal line?

A

Line left on a tooth due to serious disease during tooth development

26
Q

What are 5 developmental defects of the oral cavity?

A
  1. Number of teeth
  2. Size of teeth
  3. Fusion of teeth
  4. Transportation of teeth
  5. Root morphology
27
Q

What are 3 ways the number of teeth in the oral cavity can be affected?

A
  1. Hypodontia
  2. Anodontia
  3. Hyperdontia
28
Q

What is hypodontia?

A

When one or more teeth fail to develop

29
Q

What 3 teeth are most likely to be affected by hypodontia?

A
  1. Lateral incisors
  2. Pre molars
  3. Molars
30
Q

What is anodontia?

A

Rare congenital disorder where all teeth are missing

31
Q

What is hyperdontia?

A

Additional teeth are found in the dental arch

32
Q

Where are extra teeth usually found in the dental arch?

A

Midline between upper central incisors

33
Q

What is the main issue with hyperdontia?

A

Extra teeth may obstruct the eruption pathway of permanent central incisors

34
Q

What are 2 ways the size of teeth in the oral cavity can be affected?

A
  1. Microdontia - Unusually small teeth

2. Macrodontia - Unusually large teeth

35
Q

What Is a germinated tooth?

A

When the enamel organ partially divides during tooth development to give 2 crowns on a tooth instead of 1

36
Q

What is the transposition of teeth?

A

Positional interchange of 2 adjacent teeth

37
Q

Where are 2 locations which transportation of teeth most likely occur?

A
  1. Permanent maxillary canine transposed with first premolar

2. Permanent mandibular canine transposed with lateral incisor

38
Q

What are 4 ways root morphology can be variant?

A
  1. Unduly curvatures
  2. Thickened at apex
  3. Concrescence
  4. Unusually long roots
39
Q

What causes a root to thicken at the apex?

A

Hypercementosis

40
Q

What is concrescence?

A

Roots of adjacent teeth become joined by cementum

41
Q

What are 2 clinical points with regards to long roots?

A
  1. Root apices of maxillary teeth could invaginate the maxillary sinus
  2. Roots of permanent 3rd mandibular molars may be in close relationship with inferior alveolar nerve

Biomedical Science 1 (19 decks)

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