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Dental Anatomy > Quiz 1 Review > Flashcards

Quiz 1 Review Flashcards

1
Q

What is the CEJ? (Crown vs. Root)

A
  • “The Cementoenamel Junction”
  • Cervical Line
  • Junction/Separation between the crown & root
  • Cementum covers the root
  • Enamel covers the crown
  • Junction of the cementum & enamel
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2
Q

What are Lingual Height Contours?

A

On the lingual surfaces of posterior teeth, the raised or convex contours are NOT called ridges but rather “Lingual Height of Contour”

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3
Q

These contours on the lingual surface are NOT in the ?

A

Cervical part of the crown

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4
Q

What are Lingual Fossae on Canines?

A

These are irregular depressions or concavities that are unique to the lingual surfaces of canines.

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5
Q

What does the Lingual Fossae divide into?

A

They divide the lingual fossa of canines into separate mesiolingual and distolingual fossae.

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6
Q

What is a Supplemental (Secondary) Groove

A

A line on the surface of a posterior tooth that does NOT divide primary portions of a tooth (i.e cusps)

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7
Q

Why will a supplemental groove usually not be named?

A

Because they may not always consistently appear on the surface of a posterior tooth

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8
Q

Many times, supplemental groove will ______________

A

separate triangular ridges from cuspal ridges on the SAME cusp

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9
Q

If present supplemental grooves are named according to….?

A

Their location

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10
Q

What tooth is the LAST “primary” tooth to erupt ?

A

The MAXILLARY 2nd molar

-Tooth A, J

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11
Q

What is the Eruption time for the Maxillary 2nd molar?

A

29 months

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12
Q

What tooth is the FIRST “primary” tooth to erupt ?

A

The MANDIBULAR 1st incisor

-Tooth P,O

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13
Q

What is the Eruption time for the Mandibular 1st incisor?

A

8 months

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14
Q

At 20 months of age which teeth have not emerged into the oral cavity?

A

Primary 2nd molars

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15
Q

What is the Transitional “Mixed” Dentition period?

A

This period beings with the emergence & eruption of the Permanent Mandibular 1st Molar at age 6

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16
Q

When does the “ Mixed Dentition Period” end?

A

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

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17
Q

What are the Permanent 1st Molars guided by?

A

They are guided by and emerge distal(behind) or posterior to the Primary 2nd Molars

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18
Q

When do the Permanent teeth begin their eruptive movements ?

A

They do not being until AFTER the CROWN is FORMED

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19
Q

What may the premature loss of Primary teeth lead to?

A

A lack of space for the Permanent dentition

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20
Q

What will have an adverse effect on the eruption of the permanent dentition?

A

Dental neglect, congenital absence, or anomalies

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21
Q 
What is the Order of Eruption of Maxillary Permanent Canine Teeth?
# 6, 11
A

The maxillary canines lag in eruption compared to the remaining maxillary anterior teeth and maxillary premolars

***Arch order 6

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22
Q

At Eight Years of Age the patient is________________?

A
  • Out of the “early” ugly ducking stage
  • The dentition “APPEARS” normal to parents
  • (Premanent 2nd molars are not present, canines, and both premolars)
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23
Q

What is Isognathous?

A

Equal-jawed or symmetrical arch alignment

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24
Q

What is Anisognathous?

A

Unequal-jawed or asymmetrical arch alignment

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25
Q

Humans have an arch alignment that is _________?

A

Considered “Partially isognathous”

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26
Q

Where is the Anterior Transverse Ridge exhibited only on?

What does it Obliterate?

A

Permanent Maxillary Molars

and is confluent with the MESIAL MARGINAL RIDGE, obliterating much of the medial triangular fossa

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27
Q

Which arch form dominates or influences the other arch form ?

A

Maxillary dominates

28
Q

Why does the maxillary form dominate?

A

1) Maxillary arch is larger than 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

29
Q

Which arch is wider or larger in measurement (leads to the domination of the arches)

A

The maxillary arch is wider from right to left sides

30
Q

Which arch are esthetics embedded more in? (leads to another reason this arch dominates)

A

The maxillary arch more than mandibular arch, because the smile line is extremely evident with maxillary anterior teeth

31
Q

Which of the teeth deviate the LEAST from the vertical (longitudinal) axis ? (From Proximal reference)

A

Mandibular Second Premolar (6 degrees)

32
Q

Which of the teeth deviate the MOST from the vertical (longitudinal) axis ? (From PROXIMAL reference)

A

The Lateral incisor (23 degrees)

33
Q

Which of the teeth deviate the LEAST from the vertical (longitudinal) axis ? (From FACIAL reference)

A

The MANDIBULAR Lateral incisor (0 degrees)

34
Q

Which of the teeth deviate the MOST from the vertical (longitudinal) axis ? (From FACIAL reference)

A

Second Molar (14 degrees)

35
Q

Teeth primarily contact their __________________

A

Their namesakes in the opposing arch

36
Q

Most teeth contact one additional tooth in the ___________

A

opposing arch

37
Q

The MAXILLARY THIRD MOLARS & MANDIBULAR CENTRAL INCISORS HAVE _____________

A

ONLY ONE antagonist in the opposing arch

*** Tooth 1 and 8 are the exceptions to the rest

38
Q

What is the location of the proximal contacts for the Midline?

A

The INCISAL THIRD (1/3)

39
Q

What is the location of the proximal contacts for the DISTAL of CENTRAL?

A

Junction of incisal and middle thirds

40
Q

What is the location of the proximal contacts for the Mesial of Lateral?

A

Junction of incisal and middle thirds

41
Q

What is the location of the proximal contacts for the Distal of Lateral?

A

Middle third

42
Q

What is the mnemonic for the Proximal Contact Areas (Facial perspective of maxillary anterior teeth?)

A

I JJ MJM

43
Q

All facial surfaces = _______ located in the ________

A

0.5 mm

Located in the cervical third

44
Q

Mandibular anterior teeth lingual surface amount of contour and location = __________ and located in the _________

A

0.5 mm

Located in the cervical third

45
Q

Mandibular first premolar teeth lingual surface amount of contour and location = ____________ located in the ________

A

0.5 mm

Located in the middle third

46
Q

Mandibular second premolar teeth lingual surface amount of contour and location = ________________ located in the ___________________

A

0.75 mm

Located in the middle third

47
Q

Mandibular molar teeth lingual surface amount of contour and location = ____________ located in the ____________

A

1 mm

Located in the middle third

48
Q

Measurements of the Height of Curvature of the Cervical Line, Maxillary Arch (Mesial Aspect)

A

Decreases from anterior incisors to posterior molars

49
Q

Measurements of the Height of Curvature of the Cervical Line, Maxillary Arch (Distal Aspect)

A

Decreases from anterior incisors to posterior molars

50
Q

What is the cervical line curves in a coronal direction on _______________

A

The proximal surface

51
Q

The measurements is from the lowest point at the cervical line to the________________________

A

the highest point in the middle of the proximal surface

52
Q

Which teeth have the most measurable curvature?

A

The anterior teeth

53
Q

Which teeth have little or no curvature?

A

The molars

54
Q

On an individual tooth the curvature is always greatest where?

A

On the mesial

55
Q

Which tooth is the largest (3.5mm)

A

The medial of the maxillary central is

56
Q

The distal of maxillary central is __________

A

2.5mm

57
Q

Regarding the periodontal fibers at the cervical line, Periodontal disease will affect the integrity of the periodontal fibers at what level of the cervical line?

A
  • Circumferential
  • Alveolar crest
  • Transseptal
  • Horizontal and oblique

*****LEADS to a degradation of the crest of the alveolar bone

58
Q

What are the Imbrication lines?

How do they run?

A
  • Negative anatomy resulting from an overlapping enamel at the cervical third
  • They run PARALLEL to the cervical line
59
Q

What are the perikymata line?

A

-Positive anatomy or the actual enamel ridges that define the imbrication lines

60
Q

Where are Imbrication and Perikymata lines mostly seen?

A

On permanent maxillary central incisors

61
Q

Regarding Tooth Form Generalizations (Mandibular Arch # 19- Left 1st molar) the contact areas are both ___________

A

Slightly more to the facial

62
Q

Mesial outlines of crowns are _______________

A

Less curved than distal outlines

63
Q

Lingual cusps are more ________________

A

pointed than the facial cusps

64
Q

Mesial cusps are more _________

A

larger than distal cusps

65
Q

Mesial marginal ridges are ______________

A

taller than distal marginal ridges

Dental Anatomy (6 decks)

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