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Dental Anatomy > Quiz 1 > Flashcards

Quiz 1 Flashcards

1
Q

What is the Cementoenamel junction?

Other names for Cementoenamel Junction

A

CEJ
Cervical Line
- The junction or separation between the crown and the root or of the cementum and enamel

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2
Q

What covers the root of the tooth?

A

Cementum

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3
Q

What covers the crown of the tooth?

A

Enamel

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4
Q

T or F, On the lingual surfaces of posterior teeth, the raised or convex contours are called ridges

A

False, Are NOT called ridges. They are called “Lingual Heights of Contour”.

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5
Q

T or F, Lingual heights of contour are not in the cervical part of the crown

A

True

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6
Q

On what teeth would you find Lingual Fossae (plural)

A

On Canines

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7
Q

What are lingual fossae on canines?

A

Irregular depressions or concavities that are unique to the lingual surfaces of canines. They divide the lingual fossa of canines into separate mesiolingual and distolingual fossae

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8
Q

4 aspects of Supplemental (secondary) Groove

A
  1. A line on the surface of a posterior tooth that does NOT divide primary portions of a tooth
  2. Will usually not be names because they may not always consistently appear on the surface of a posterior tooth
  3. Many times, they will separate triangular ridges from cuspal ridges on the same cusp
  4. If present, supplemental grooves are named according to their location
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9
Q

What is the last primary tooth to erupt and when does it occur?

A

Maxillary 2nd molar

29 months

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10
Q

What is the first primary tooth to erupt and when does it occur?

A

First incisor at 8 months

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11
Q

At twenty months of age, which of the primary teeth have emerged

A

All of primary teeth (Incisors, Canines, First molar) except the second molars have emerged

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12
Q

The Transitional “Mixed” Dentition Period begins with what?

A

The emergence and eruption of the Permanent Mandibular 1st Molar at age 6

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13
Q

How does the Mixed Dentition period end?

A

With the loss of the last primary tooth, either the maxillary canine or usually the maxillary second molar at age 11-12

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14
Q

How are the permanent 1st molars guided as they emerge?

A

By and emerge distal or posterior to the Primary 2nd molars

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15
Q

When do the permanent teeth begin their eruptive movements?

A

Not until after the crown is formed

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16
Q

What may occur during the Mixed dentition period if you have premature loss of primary teeth?

A

May lead to a lack of space for the permanent dentition

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17
Q

What 3 things may have an adverse effect on the eruption of the permanent dentition?

A

Dental neglect
Congenital absence
Anomalies

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18
Q

What is the order of eruption for maxillary permanent teeth?

A

1st molar, Central Incisor, Lateral Incisor, 1st Premolar, 2nd Premolar, CANINE, 2nd Molar, 3rd Molar
- Canines lag behind anterior teeth and premolars

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19
Q

At eight years of age, what permanent teeth have erupted?

A

Central Incisors, Mandibular Lateral Incisor, 1st molars.

- No Canines, or premolars

20
Q

Humans have an arch alignment that is considered what?

A

Partially Isognathous or not perfectly symmetrical

21
Q

What is Isognathous?

A

Equal-jawed or symmetrical arch alignment

22
Q

what is Anisognathous?

A

Unequal-jawed or asymmetrical arch alignment

23
Q

Anterior Transverse Ridge is exhibited only on ?

A

Permanent Maxillary Molars and is confluent with the mesial marginal ridge, obliterating much of the mesial triangular fossa.

24
Q

The maxillary arch form dominates or influences the mandibular arch form because of what 3 reasons?

A
  1. Maxillary arch is Larger than in the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side.
  2. Maxillary arch is wider or larger in measurement from right to left sides
  3. Esthetics are embedded more in the maxillary arch than in the mandibular arch, because the small line is extremely evident with maxillary anterior teeth
25
Q

What is the Proximal reference angle for the Manidbular Second and First Premolar respectively?

A

Second Premolar: 6 degrees

First Premolar: 9 degrees.

26
Q

Facial reference angle for the mandibular Lateral and Central incisors?

A

Lateral Incisor: 0 degrees

Central Incisor: 2 degrees

27
Q

What two teeth show the least deviation from vertical axis in the mandibular teeth?

A 
Lateral Incisor (Facial)
Premolars (Proximal view)
28
Q

Which teeth have only one antagonist in the opposing arch of occlusal?

A

Mandibular Central incisors

Maxillary third molars

29
Q

Proximal contact areas of maxillary anterior teeth:

Midline, Distal of Central, Mesial of Lateral, Distal of Lateral, Mesial of Canine, Distal of Canine

A

Midline: Incisal Third
Distal of Central: Junctrion of Incisal and Middle thirds
Mesial of Lateral: Junction of Incisal and Middle thirds
Distal of Lateral: Middle Third
Mesial of Canine: Junction of Incisal and Middle thirds
Distal of Canine: Middle third

30
Q

Height of Contour - Mandibular arch for All facial surfaces

A

0.5 mm located in cervical third

31
Q

Height of Contour - Mandibular anterior teeth lingual surface amount of contour and location:

A

0.5 mm in the cervical third

32
Q

Height of Contour - Mandibular first premolar teeth lingual surface amount of contour and location:

A

0.5 mm in the middle third

33
Q

Mandibular second premolar teeth lingual surface amount of contour and location:

A

0.75 mm located in middle third

34
Q

Mandibular molar teeth lingual surface amount of contour and location:

A

1 mm located in middle third

35
Q

The cervical line curves in a _______ direction on the ________ surface

A

Coronal direction

Proximal surface

36
Q

Measurement of height of curvature of cervical line is from the ______ point at the cervical line to the ______ point in the _______ of the ________ surface

A

lowest
highest
middle
proximal

37
Q

What teeth have the most measurable curvature?

A

Anterior teeth

Molars have little or no curvature

38
Q

On an individual tooth, the curvature is always greatest where?

A

On the mesial

39
Q

Mesial of the maxillary central is ?

A

3.5 mm (largest)

40
Q

Distal of maxillary central is?

A

2.5 mm

41
Q

Perikymata denote what type of anatomy?

A

Positive anatomy

42
Q

Imbrication lines indicate what type of anatomy?

A

Negative anatomy

43
Q

Imbrication lines and perikymata are mostly seen on what teeth?

A

Permanent maxillary central incisors

44
Q

Imbrication lines run parallel to what?

A

Cervical lines

45
Q

Slide 19 and 21

A

Dude

Dental Anatomy (8 decks)

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