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Dental Anatomy > Exam 2 Review > Flashcards

Exam 2 Review Flashcards

1
Q

On a permanent anterior crown, what entity has the smallest surface area?

A

Incisal Edge

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2
Q

What is the sequence of the first evidence of calcification of Primary Dentition?

A
  • Central Incisor
  • 1st Molar
  • Lateral Incisor
  • Canine
  • 2nd Molar
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3
Q

What are the first primary teeth roots to completely form and in how long?

A

In 1.5 years:

  • Maxillary Central Incisors
  • Mandibular Central Incisors
  • Mandibular Lateral Incisors
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4
Q

What is happening at six years of age?

What permanent crowns have completed calcification?

A
  • Anterior tooth spacing has stopped expanding
  • Permanent 1st molars erupt (but not completely calcified)
  • All crowns on the permanent incisors, first premolars and first molars have completely calcified
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5
Q

What is the order of calcification in permanent mandibular teeth? (from first to last)

A
  1. First molar
  2. Central/Lateral incisors
  3. Canine
  4. Premolars
  5. 2nd Molar
  6. 3rd Molar
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6
Q

What is the order of eruption of mandibular permanent teeth? (from first to last)

A
  1. 1st Molar
  2. Central Incisor
  3. Lateral Incisor
  4. Canine
  5. 1st Premolar
  6. 2nd Premolar
  7. 2nd Molar
  8. 3rd Molar
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7
Q

At 8 years of age, what is going on with the 3rd molars?

A

The 3rd Molars have not initiated calcification (happens at 9 years)

** This will be the only INCORRECT one **

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8
Q

What type of mammalian phylogenetic development has 3 cusps in a primary triangle?

A

Tritubercular Molar

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9
Q

What are the facial reference angles for each of the mandibular teeth?

A
  • Central Incisor - 2 degrees
  • Lateral Incisor - 0 degrees
  • Canine - 6 degrees
  • First Premolar - 6 degrees
  • Second Premolar - 9 degrees
  • First Molar - 10 degrees
  • Second Molar - 14 degrees
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10
Q

In the maxillary anterior teeth, what are the locations of the proximal contacts?

A
  • Midline - Incisal third
  • Distal of Central - Junction of incisal & middle thirds
  • Mesial of Lateral - Junction of incisal & middle thirds
  • Distal of Lateral - Middle third
  • Mesial of Canine - Junction of incisal & middle thirds
  • Distal of Canine - Middle third
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11
Q

Which periodontal fibers are known to resist forceful impaction of a tooth into the alveolus, consistent with trauma?

A

Oblique Fibers

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12
Q

What is the smallest and largest embrasure in the facial view of the maxillary posterior teeth?

A
  • Smallest - occlusal embrasure between _1st and 2nd Molars _
  • Largest - occlusal embrasure between the Canine and 1st Premolar
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13
Q

What do Primary Teeth have that are different than Permanent Teeth?

A
  • Thinner dentin
  • Thinner enamel
  • Taller pulp horns
  • **Proportionally larger pulp chambers**
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14
Q

The Primary Maxillary Lateral Incisor in the incisal view.

  1. ) How does the crown taper?
  2. ) What is the incisal ridge curved towards?
  3. ) The distolingual profile is slightly _______?
  4. ) Describe the lingual fossa.
  5. ) Is there a cingulum?
A
  1. Lingually
  2. The facial surface
  3. Concave
  4. Modestly deep
  5. Yes!
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15
Q

On the occlusal view of the Primary Maxillary Second Molar -

  1. ) How many cusps are on this tooth?
  2. ) _What is the larges_t/smallest cusp?
  3. ) What is the shape of the crown outline?
  4. ) What does the distinct transverse ridge involve?
  5. ) What does the transverse groove of the oblique ridge cross and connect?
A
  1. 5 cusps
  2. Largest - Mesiolingual, smallest - Cusp of Carabelli
  3. Somewhat Rhomboidal - distal crown convergence
  4. Traingular ridges of the mesially-positioned cusps
  5. Crosses the oblique ridge and connects the central pit with the distal pit
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16
Q

In the facial view of the Primary Mandibular First Molar -

  1. ) The mesial surface outline is relatively ____?
  2. ) Where are the proximal contact areas?
  3. ) Which cusp is larger and taller?
  4. ) Where does the cervical line point on the mesial half of the tooth?
  5. ) Which root is much longer and more straight?
A
  1. Flat (not convex)
  2. Occlusal portion of the middle third (almost to the junction
  3. Mesiofacial > Distofacial
  4. Apically onto the mesial root surface
  5. Mesial root > Distal root
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17
Q

Dental Anomalies

Fusion is a condition when 1.) __________, is the union of two adjacent 2.) __________, and always involves 3.) ___________?

Concrescence is the 4.) __________ of roots of approximating teeth by way of the deposition of only 5.) ____________?

A
  1. Two roots combine into one crown
  2. Tooth germs
  3. Dentin
  4. Superficial union
  5. Cementum
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18
Q

Permanent Maxillary Central Incisor - Incisal View

  1. The crest of the cingulum is ___________ to the mediodistal bisecting plane of the crown.
  2. The facial surface outline between the mesiofacial and distofacial line angles is __________.
A
  1. Slightly Distal
  2. Relatively Straight
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19
Q

When differentiating between Maxillary Central & Lateral Incisors - what will help you differentiate, what will not?

A

Will help differentiate:

  • Size
  • Angularity
  • Root curvature

Will NOT help differentiate:

  • Crests of Cingulum on both incisors
  • Presence of lingual fossa
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20
Q

In the mesial view of the Permanent Mandibular Lateral Incisors -

1.) The incisal ridge will be _______ to the faciolingual long axis bisector of the tooth.

**The crest of the 2.) _______ cervical ridge will be higher incisally than the crest of the 3.)________ cervical ridge.

The cervical line curves 4.)________ to a lower level on the distal surface than on the mesial.

A broad root depression will exist for 5.) _________?

A
  1. Lingual
  2. Facial
  3. Lingual
  4. Incisally
  5. Most of the root length
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21
Q

In the distal view of the Permanent Maxillary Canine -

The cusp tip is aligned with the 1.) _________ and the 2.)__________?

There is a pronounced concavity, which is 3.) ________ to the distal contact area.

A
  1. Apex of the root (root tip)
  2. Height of curvature of the cervical line
  3. Cervical
22
Q

Incisal View - Permanent Mandibular Canine

  1. What is the shape of the crown outline?

The crown is bulkier on the 2.) ________ than on the 3.) _______? (it tapers toward the 4.) _______)

  1. Which measurement is greater, the faciolingual or the mesiodistal?
A
  1. Diamond - like the maxillary canine
  2. Facial
  3. Lingual
  4. Lingual
  5. Faciolingual
23
Q

Permanent Maxilary First Premolar - Mesial View

The proximal contact area is located just cervical to the 1.) _________ and facial to the 2.) ___________.

A
  1. Facial segment of the mesial marginal ridge
  2. Mesial marginal developmental groove
24
Q

Permanent Maxillary First Premolar - Occlusal

  1. ) Where is the facial cusp tip in regards to the mesiodistal bisector?
  2. ) The cusp tip is also _______ the distance from the facial outline to the faciolingual bisector of the crown.
A
  1. Distal
  2. One-third
25
Q

Permanent Maxillary Second Premolar - Occlusal

  1. ) How are the mesial and distal traingular fossae shaped?
  2. ) When compared to the triangular fossae on the maxillary first premolar, where are the fossae located?

Which gives them a 3.) _________ and 4.) __________?

A
  1. Irregularly Shaped
  2. Nearer to the center of the tooth
  3. Short Central Groove
  4. Wide Marginal Ridges
26
Q

Permanent Mandibular First Premolar - Mesial View

Where is the central groove positioned?

A

On the LINGUAL portion of the crown

27
Q

Permanent Mandibular First Premolar - Occlusal View

  1. How does the traingular ridge of the facial cusp compare to the traingular ridge of the lingual cusp?
A
  1. The triangular ridge of the facial cusp is very long, lingual is very short

Facial is much bigger

28
Q

Permanent Mandibular Premolars

What are the ways to differentiate between 1st and 2nd Premolars?

What will not help differentiate?

A
  • Occlusal table shape
  • Number of cusps
  • Lingual groove presence
  • Central pit presence

Would not help:

  • Central groove presence
  • Mesiolingual groove
29
Q

Permanent Maxillary First Molar - Facial view

The lingual root is evident and is the 1.) __________ of the 3 roots by about 2.) ______. It’s apex is in line with the 3.) ___________ when viewed from this aspect.

A
  1. Longest
  2. 1.0mm
  3. Facial Groove (not lined up with any cusp tip)
30
Q

Permanent Maxillary First Molar - mesia view

What are 2 (1., 2.) characteristics of the root surface depression?

  1. ) What does it encompass?
  2. ) Does the root surface depression come above the cervical line?
A
  1. Relatively wide
  2. Shallow
  3. Cervical, Middle and Apical (small portion) third of the root
  4. _No - it doesn’t extend occlusally across the cervical line onto the crown. _
31
Q

Permanent Maxillary First Molar - distal view

The apex of the lingual root is vertically positioned between what?

A

The greatest lingual contour of the crown and the tip of the distolingual cusp

***Not lined up with any cusp tip***

32
Q

Occlusal Aspect - Permanent Maxillary First Molar

Each cusp has well developed cuspal ridges that extend 1.) _________ from the tip of the respective cusp.

The longest cuspal ridge is the 2.) __________?

A
  1. Laterally (mesially and distally)
  2. Distal cusp ridge of the Mesiolingual cusp
33
Q

Permanent Maxillary Second Molar - Occlusal view

There is no 1.) ________ on the maxillary second molars.

A
  1. Separate Distal Pit (from the distal triangular pit)
34
Q

What are the names of the pits on the occlusal aspect of the Permanent Maxillary Third Molars?

A
  • Central Pit
  • Mesial Triangular Pit
  • Distal Triangular Pit
35
Q

Permanent Mandibular First Molar - facial aspect

What are the cusps from tallest to shortest?

A
  • Mesiolingual
  • Mesiofacial
  • Distofacial
  • Distolingual
  • Distal
36
Q

Facial view - Permanent Mandibular First Molar

  1. ) Where is the cervical ridge located?
  2. ) Where is the lateral depression located?
  3. ) How many facial grooves are there, and what are their names?
A
  1. In the Mesial 2/3rds of the mesiodistal width of the tooth
  2. In the middle third (not in cervical third)
  3. 2 - Mesiofacial, Distofacial - neither of them cross the cervical line
37
Q

Permanent Mandibular First Molar - Mesial Aspect

The lingual cusp tip is vertically lined up with what?

A

Lingual root ouline, in the middle (cervical - on slide) one-third of the root.

38
Q

Permanent Mandibular First Molar - Distal view

What do the apices of the two roots line up with what?

A

No discernible anatomical entity

39
Q

Permanent Mandibular First Molar - Occlusal view

What is the most facially and most mesially placed cusp tip?

A
  • Facially - Distofacial cusp
  • Mesially - Mesiolingual cusp
40
Q

Permanent Mandibular Second Molar - Facial view

Which cusp is slightly wider, the distofacial or the mesiofacial?

A

The mesiofacial cusp is slightly wider than the _distofacial cusp. _

41
Q

Mesial view - Permanent Mandibular Second Molar

The facial outline of the crown has a 1.) _________ measurement than the lingual crown, as it is measured from the 2.) _________ to the 3.) ____________.

  1. ) Which cusp tips are more pointed?
  2. ) The groove crossing the mesial marginal ridge and the central groove are both located __________ to the faciolingual bisector.
A
  1. Longer
  2. Cervical Line
  3. Respective Cusp Tip
  4. The lingual cusp tips are more pointed than the facial cusp tips
  5. Lingual
42
Q

Occlusal - Permanent Mandibular Second Molar

The central pit forms where the 1.) _______, _______ and _______ grooves meet and is located on the 4.) ___________ half of the crown.

A
  1. Facial, Lingual and Central grooves
  2. Lingual
43
Q

Mesial view - Permanent Mandibular Third Molar

What is the angle of the triangular ridges of both the facial and lingual cusps?

A

40 degrees

44
Q

Occlusal view - Permanent Mandibular Third Molar

Which line angle is the most angled and sharpest?

A

Mesiolingual Line Angle

45
Q

Permanent Maxillary First Premolar - Mesial

The length of the root trunk will vary but usually the 1.)_________ of the root system will definitely present a facial and lingual root.

This tooth has a deep 2.) __________ that crosses the 3.)_____________.

A
  1. Apical 1/4 (bifurcation)
  2. Root Depression
  3. Cervical Line
46
Q

Lingual view - Permanent Maxillary First Molar

There is a 1.) ________ developmental depression in the 2.) ___________ of the lingual (palatal) root that consistantly extends occlusally from the root surface and across the 3.) ___________ onto the 4.) ___________ of the crown.

A
  1. Shallow
  2. Middle one-third
  3. Cervical line
  4. Cervical third
47
Q

Permanent Maxillary Central Incisors

  1. In the cervical cross-section, describe the pulp chamber.
  2. From a facial view, how many distinct horns are in the pulp chamber?
A
  1. It is wider on the facial aspect than on the lingual aspect
  2. 3 distinct pulp horns
48
Q

Permanent Mandibular Canine

What are the percentages of the following:

One canal?

Two canals?

One root?

Two Roots?

3 Canals?

A
  • One Canal - 90%
  • Two Canals - 10%
  • One Root - 95%
  • Two Roots - 5%
  • _Three Canals - 0% _
49
Q

Maxillary First Premolar

What are the following percentages?

Two Canals?

One Canal?

Three Canals?

Two Roots?

One Root?

Three Roots?

A
  • Two Canals - 83%
  • One Canal - 12%
  • Three Canals - 2%
  • Two Roots - 75%
  • One Root - 23%
  • Three Roots - 2%
50
Q

Permanent Maxillary First Molar

The percentage of time in the Mesiofacial root with two or more canals is what?

A

59.2%

Dental Anatomy (4 decks)

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