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Dental Anatomy > Exam 1 Review > Flashcards

Exam 1 Review Flashcards

1
Q

How many permanent teeth are there and what is in each quadrant?

A

32 Permanent Teeth

  • Central Incisor
  • Lateral Incisor
  • Canine
  • First Premolar
  • Second Premolar
  • First Molar
  • Second Molar
  • Third Molar
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2
Q

What is the portion of a tooth that is clinically visible?

A

Clinical crown

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3
Q

The ridges that descend from the tips of the cusps of ONLY posterior teeth and travel toward the central part of the occlusal surface are called what?

A

Triangular Ridges

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4
Q

What are triangular ridges on the facial cusps and lingual cusps called?

A

Only called Triangular Ridges

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5
Q

What kind of ridge is referred to as a “special kind” of transverse ridge? And why is it special?

A

Oblique Ridge

Union of the triangular ridge of the distofacial cups and the distal cusp ridge of the mesiolingual cusp across the facial-lingual perimeter.

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6
Q

What are on the margins of borders of the lingual surface of anterior teeth? (rounded borders of enamel)

A

Marginal Ridges

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7
Q

What are the raised or convex contours on the lingual surfaces of posterior teeth called?

A

Lingual Heights of Contour

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8
Q

What are the properly named developmental pits?

A
  • Facial Pit
  • Mesial triangular pit
  • Distal triangular pit
  • Central pit
  • Lingual pit
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9
Q

What is the junction of the mesial surface with the incisal surface called on anterior teeth?

A

Mesioincisal Line Angle (MI)

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10
Q

What is the last primary tooth to begin calcification and when?

A

Maxillary 2nd Molar at 19 weeks in utero

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11
Q

At birth, what crowns have completely formed and what teeth have begun calcification?

A

Have completely formed:

  • Primary mandibular first molar crowns
  • Primary mandibular central incisor crowns

Begun Calcification:

  • Both permanent mandibular/maxillary first molars
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12
Q

What are the first permanent teeth to erupt and the last to erupt and when?

A

First:

  • 1st Molar at 6 years

Last:

  • 3rd Molars at 19 years
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13
Q

What are the main primary dentition eruption facts?

A
  • ** Initial mineralization of the Primary Dentition is entirely prenatal
  • Calcification begins at about 13-16 weeks in utero
  • All primary teeth have initiated calcification at 18-20 weeks in utero
  • Primate space begins to form at 4 yrs
  • Primary tooth occlusion is evident at age 3
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14
Q

According to the Tritubercular Molar Cusp Theory, Which particular cusps are present in all forms of teeth in the mandible? Maxilla?

A
  • Maxilla = Protocone
  • Mandible = Protoconid
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15
Q

From a proximal view, the long axis to the permanent maxillary teeth that deviates the most from the respective vertical axis is what? And which one deviates the least? By how much?

A

Most: Maxillary Central Incisor = 28 degrees

Least: Maxillary First Premolar = 5 degrees

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16
Q

What is the lingual surface height of contour of the mandibular second premolar?

A

0.75 mm - in the middle third

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17
Q
  1. Which teeth have more height of curvature of the cervical line?
  2. What is the relationship between: the height of curvature of the cervical line, the size of the cervical and occlusal/incisal embrasures, and the cervico-incisal or cervico-occlusal height of the contact area?
  3. Which teeth have less height of curvature (the mandibular posterior teeth or the maxillary anterior teeth)?
A
  1. Maxillary Teeth
  2. There is a correlation
  3. The mandibular posterior teeth have less height of curvature than the anterior teeth.

** Never will see a posterior tooth with a higher height of curvature than anterior **

18
Q

How do the roots of the primary teeth differ from the permanent teeth?

A
  • Longer root lengths relative to the crown heights
  • Apices are more pointed
  • Minimal root angulation is exhibited
  • Mesial roots are more curved than distal roots
19
Q

On the Occlusal view of the Primary Mandibular First Molar - what is the largest and smallest cusp size?

A
  • Smallest - Distolingual
  • Largest - Mesiofacial
20
Q

On the mesial view of the Permanent Mandibular Lateral Incisor - The crest of the facial cervical ridge will be at a _________ level incisally than the crest of the lingual cervical ridge?

A

Higher level

21
Q

On the incisal view of the Permanent Maxillary Canine -

  1. The mesiofacial line angle is significantly ________________ than the distofacial line ange.
  2. What part of the crown appears “stretched” or elongated or pinches in order to make contact with the mesial of the maxillary first premolar?
A
  1. More Developed
  2. Distal Portion
22
Q

In the facial view of the Permanent Maxillary First Premolar -

  1. Describe the cusp tip?
  2. How is the cusp tip positioned to the mesiodistal long axis bisector?
  3. How does the mesial cuspal ridge of the facial cusp compare to the disal cuspal ridge?
  4. Which cusp is taller, the facial or lingual?
A
  1. Relatively pointed
  2. Slightly distal
  3. Mesial cuspal ridge is LONGER than distal cuspal ridge
  4. Facial cusp tip is TALLER
23
Q

In the mesial view of the Permanent Maxillary First Premolar -

  1. The mesial cuspal ridges of the facial and lingual cusps converge __________ ?
  2. The crest of the mesial marginal ridge is almost ___________ to the faciolingual long axis bisector and is divided into a facial and lingual segment by the (3.)_________________ ?
A
  1. Cervically
  2. Perpendicular
  3. Mesial Marginal Developmental Groove
24
Q

In the Occlusal view of the Permanent Maxillary First Premolar -

  1. The mesial segment of the outline measures ____________ than the distal outline.
  2. The mesial outline reflects the contour of a reverse figure 3 due to the presence of the ____________________?
A
  1. Less Faciolingually
  2. Mesial Marginal Ridge Developmental Groove
25
Q

In the Occlusal view of the Permanent Maxillary First Premolar -

  1. Where do the triangular ridges from the facial and lingual cusps meet when compared to the faciolingual bistector of the crown?
  2. A true transverse ridge can exist, but is separated by what?
A
  1. Slightly lingual to the faciolingual bisector of the crown
  2. A Deep central groove

**Probably will be both false**

26
Q

In the Occlusal view of the Permanent Maxillary First Premolar -

Describe the locations of the mesial and distal triangular fossae?

A

They are _far apart from eachothe_r and close to the mesial and distal occlusal outlines.

27
Q

In the facial view of the Permanent Maxillary Second Premolar -

  1. The facial cusp tip will usually be _______ to the mesiodistal long axis bisector.
  2. The mesial cuspal ridge is ________ than the distal cuspal ridge.
A
  1. Slightly Mesial
  2. Shorter
28
Q

In the mesial view of the Permanent Maxillary Second Premolar -

  1. Which cusp tip is more pointed?
  2. Where is the facial cusp tip in regards to the lines that mark the greatest facial curvature and the faciolingual long axis bisector of the crown?
A
  1. Facial cusp tip is more pointed than the lingual cusp tip
  2. _Half way _
29
Q

In the mesial view of the Permanent Maxillary Second Premolar -

1 The slants of the triangular ridges are ______ as those seen on the maxillary first premolar.

  1. The mesial marginal ridge is ________ across the tooth.
  2. The mesial marginal ridge is ___________?
A
  1. Not as steep
  2. Horizontal
  3. Continuous (no split groove)
30
Q

In the occlusal view of the Permanent Maxillary Second Premolar -

  1. How are the mesial and distal triangular fossae shaped?
  2. Where are the mesial and distal triangular fossae located, when compared to the triangular fossae on the maxillary first premolar?
  3. With those facts, how is this tooth is also described as having ___________ (two things)?
A
  1. Irregularly shaped
  2. Nearer to the center of the tooth
  3. Relatively short central groove and relatively _wide marginal ridges _
31
Q

Permanent Mandibular Premolars

Facial profiles, viewed from the proximal aspect, they are ________ from the height of contour (cervical ridge) to the tip of the facial cusp.

A

Inclined Lingually

**This will probably be the correct answer - read through the other bullet points on slide 32 to know the other facts (which will probably be false) **

32
Q

On the lingual view of the Permanent Mandibular First Premolar -

  1. The lingual cusp tip is about how tall compared to the height of the facial cusp tip?
A
  1. Two-Thirds

**This will be the true answer**

Other bullet points will probably be false.

33
Q

In the mesial view of the Permanent Mandibular First Premolar -

  1. Is the lingual cusp tip supported by the root structure?
  2. How is the lingual cusp tip positioned?
A
  1. No - it is not supported by root structure
  2. The lingual cusp tip is more lingually positioned than the confines of the lingual root surface.
34
Q

In the mesial view of the Permanent Mandibular First Premolar -

  1. Where is the height of contour on the lingual surface said to be __________, if a measurement from the cervical line to the height of the (2.)__________ is used?
A
  1. Middle one third
  2. Facial cusp tip
35
Q

In the occlusal view of the Permanent Mandibular First Premolar -

What is the shape of the Mesial Groove at the bottom of the Mesial Triangular Fossa? And what is it continuous with?

A

Linear shape and continuous with the Mesiolingual Groove

36
Q

On the facial view of the Permanent Mandibular Second Premolar -

Which particular cuspal ridge is SHORTER?

A

The Mesial Cuspal Ridge of the facial cusp is SHORTER than the Distal Cuspal Ridge

37
Q

In the mesial view of the Permanent Mandibular Second Premolar -

The mesial marginal ridge is _________ occlusally and is more ___________ than the mesial marginal ridge of the Mandibular First Premolar.

A
  1. Higher
  2. Horizontal

The mesial marginal ridge is at a HIGHER level occlusally and is more HORIZONTALLY-positioned than the mesial marginal ridge of the Mandibular First Premolar.

38
Q

In the Distal View of the Permanent Mandibular Second Premolar what cusp tips can you see?

A
  • Mesiolingual Cusp
  • Distolingual Cusp
  • Facial Cusp
39
Q

When viewing the occlusal surface of the Permanent Mandibular Second Premolar the position of the facial cusp is where?

A

Slightly Mesial and Facial

40
Q

When comparing Permanent Mandibular Premolars - what characteristic will not help you differentiate between the two?

A

The curvature of cervical lines

Dental Anatomy (4 decks)

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