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Dental Anatomy > Exam 2 Review > Flashcards

Exam 2 Review Flashcards

1
Q

How many primary teeth?

A

20, Lettered A - T beginning with the primary maxillary right second molar

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2
Q

Which type of anatomy (positive or negative) is formed or constructed first?

A

Positive anatomy is formed or constructed first, which then properly displays the negative anatomy

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3
Q

Which type of ridges descend from the tips of the cusps of only posterior teeth and travel toward the central part of the occlusal surface?

A

Triangular Ridges

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4
Q

Which teeth have triangular ridges?

A

Posterior Teeth

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5
Q

T or F, each posterior tooth cusp has exactly two triangular ridges

A

false, Each posterior tooth cusp has only ONE triangular ridge.

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6
Q

T or f, Triangular ridges are wider at the base than at the cusp tip

A

True

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7
Q

At what weeks in utero does calcification commence?

A

At about 13-16 weeks

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8
Q

What is the sequence of first evidence of calcification?

A 
Central incisor -->
1st molar --> 
Lateral Incisor -->
Canine -->
2nd Molar
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9
Q

At what weeks in utero have all primary teeth initiated calcification?

A

At 18-20 weeks in utero

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10
Q

Which teeth form from only a single center of calcification?

A

Primary Anterior Teeth

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11
Q

How many mamelons and developmoental depressions are evident in primary anterior teeth?

A

None

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12
Q

Which permanent teeth are initiating calcification from birth to one year of age?

A

First Molar
Central incisor
Canine
Lateral incisor

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13
Q

Which permanent teeth are initiating calcification from two to four years of age?

A

Premolars

Second Molars

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14
Q

Which teeth have begun calcification by 9 years of age?

A

Third Molars

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15
Q

Which classification of cusp forms is characterized by Four cusps in a rectangular or rhomboid form?

A

Quadritubercular Molar

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16
Q

Which teeth have only ONE antagonist in the opposing arch?

A

The maxillary third molars

Mandibular central incisors

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17
Q

T or F, Teeth primarily contact their namesakes in the opposing arch. Most teeth contact one additional tooth in the opposing arch

A

True

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18
Q

T or F, On mandibular teeth, the cervical line curves in a radicular direction on the proximal surface

A

False, it curves in a coronal direction

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19
Q

What are the two measurement points for the height of curvature of the cervical line on mandibular arch?

A

From the lowest point at the cervical line to the highest point in the middle of the proximal surface

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20
Q

Which teeth have the most measurable curvature in the height of curvature in the mandibular arch?

A

Anterior teeth

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21
Q

How much height of curvature do molars have on the mandibular arch?

A

Little or no curvature

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22
Q

On mandibular arch, which side of tooth has the greatest curvature?

A

The mesial aspect

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23
Q

The measurement of the mesial mandibular central? Measurement of distal mandibular central?

A
  1. 0 mm (largest)

2. 0 mm

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24
Q

What portion of the tooth are circular (circumferential) periodontal fibers found and what is their purpose?

A
  • Located at the cervical third of the crown and root of a tooth
  • Influences the rotation of a tooth within an alveolus
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25
Q

Where is the largest embrasure in the maxilla?

A

Between canine and 1st molar

26
Q

Where is the smallest embrasure in the posterior maxilla?

A

Between 1st and 2nd molars, However the smallest embrasure is at the midline

27
Q

Which portion of crowns are generally more developed?

A

Mesial portions are generally more developed than the distal

28
Q

Which cusps are generally larger?

A

The mesial cusps are larger than distal cusps

29
Q

Which marginal ridges are usually taller?

What is the exception to this rule

A

Mesial marginal ridges are usually taller than the distal marginal ridges (an exception is the mandibular first premolar!!!!!!)

30
Q

Molars taper in what direction?

A

Mesiodistally

31
Q

All teeth taper in which direction? Are there exceptions to this rule?

A

Taper Faciolingually

- Except the maxillary first molar & the Y-grooved mandibular second premolar

32
Q

T or F, Molar roots of primary teeth are straight and point inward at the root apices

A

False, They flare markedly and thin out rapidly as the apices are approached

33
Q

T or F, Primary roots are narrow and short when compared to crown width and length

A

False, Narrow and LONG when compared to crown width and length

34
Q

Primary Mandibular Canines: (Facial) What is the difference between this tooth and the maxillary canine?

A
  • Very similar in form & size to the maxillary canine

- except that the specific anatomy is less developed

35
Q

Primary Mandibular Canines: (Facial) What are the size differences in the crown and root in comparison to the maxillary canine?

A
  • Crown may be 0.5 mm shorter

- Root may be 2.0 mm shorter

36
Q

Primary Mandibular Canines: (Facial) The cusp tip is what direction of the center line? Which cuspal ridge is longer?

A
  • Cusp tip is mesial of center

- Distal cuspal ridge is longer than mesial cuspal ridge (this is opposite of the maxillary canine)

37
Q

Primary Mandibular Canines: (Facial) T or F, Both the maxillary and mandibular canine have a cusp tip that is mesial of center and a longer distal cuspal ridge than mesial cuspal ridge

A

False, Those specs are true of mandibular canines but opposite to the maxillary canine

38
Q

Primary Mandibular Canines: (Facial) Does the root tip display any curvature?

A

No, usually does not display any curvature

39
Q

Primary Mandibular Canines: (Facial) T or F, Mesial outline of the crown is straight, while the distal outline is convex

A

TRUE

40
Q

Primary Mandibular First Molar: (Occlusal) What is the crown outline form shape?

A

Rhomboidal

41
Q

Primary Mandibular First Molar: (Occlusal) Primary mandibular molars are wider in which directional surface?

A

Wider mesiodistally than they are faciolingually

42
Q

Primary Mandibular First Molar: (Occlusal) Which line angle is quite prominent?

A

Mesiofacial line angle

43
Q

Primary Mandibular First Molar: (Occlusal) Cusp sizes in order of largest to smallest:

A

Mesiofacial
Mesiolingual
Distofacial
Distolingual

44
Q

Primary Mandibular First Molar: (Occlusal) What developmental grooves are present?

A

Long Central developmental groove
Short facial developmental groove
Short lingual developmental groove

45
Q

Primary Mandibular First Molar: (Occlusal) What major fossae exist on the surface?

A

Central, Mesial triangular fossa, Distal triangular fossa

46
Q

Primary Mandibular First Molar: (Occlusal) Which directions does the crown converge?

A

To the lingual and to the distal

47
Q

Primary Mandibular First Molar: (Occlusal) T or F, the primary mandibular 1st molar resembles the permanent mandibular canine

A

false, Primary mandibular 1st molar does not resemble any other primary or permanent tooth in human dentition

48
Q

Primary Mandibular Second Molar: (Facial) The crown form resembles what other tooth?

A

Permanent mandibular first molar

49
Q

Primary Mandibular Second Molar: (Facial) Proximal contact areas are in what portion of the crown?

A

Middle third of the crown

50
Q

Primary Mandibular Second Molar: (Facial) Which cusps are visible from the facial view and which are all close to the same size?

A
  • All five cusps are visible from the facial view

- All three facial cusps (mesiofacial, distofacial, and distal) are all close to the same size

51
Q

Primary Mandibular Second Molar: (Facial) Cervical line looks like what?

A

Has an apical dip in the area of the birfurcation

52
Q

Primary Mandibular Second Molar: (Facial) How many roots and which is longer?

A

Two roots on tooth

- Mesial root is longer than the distal root

53
Q

Primary Mandibular Second Molar: (Facial) T or F, Both roots are narrow mesiodistally and wide faciolingually. The roots and short and slender with a characteristic flare.

A
  • 1st statement true

- 2nd statement false –> long and slender

54
Q

Primary Mandibular Second Molar: (Facial) Which mandibular molar is larger? Is this tooth larger than its permanent replacement?

A

Mandibular second molar is larger.

- It is also larger than its permanent replacement (mandibular second premolar)

55
Q

Tetracycline staining of the teeth is known as what primarily involving what part of the tooth

A
  • Known as intrinsic or internal staining of the teeth, involving primarily the dentin
56
Q

T or F, The structure of the teeth is compromised by the intrinsic staining

A

False, It is not compromised

57
Q

What causes tetracycline staining of the teeth?

A

Usually caused by antibiotic therapy administered during the formative stages of tooth development

58
Q

Do dental bleaching material and procedures help eliminate tetracycline staining of the teeth.

A

They have little success in eliminating these deep, internal stains

59
Q

What is the best way to overcome the esthetic problems of tetracycline staining of the teeth

A

These patients will need to have veneers or full crown porcelain restoration

60
Q

Which tooth generally displays dens-in-dente?

A

Permanent maxillary lateral incisors

Dental Anatomy (8 decks)

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