Nomenclature Flashcards

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1
Q

By what month have all the primary teeth erupted?

A

24-36th month

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2
Q

By what month have all the primary teeth erupted and in occlusion?

A

36th

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3
Q

When does the first tooth appear?

A

6th month

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4
Q

When do all the permanent teeth erupt?

A

13-14 years except 3rd molars

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5
Q

Other terms for facial? (2)

A

labial - facing the lips

buccal - facing the buccinator muscle of cheek

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6
Q

Definition and other term for lingual? (2)

A

tooth surface nearest to the tongue

palatal - upper arch

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7
Q

Nominal nomenclature system? (2)

A

Each tooth is called by its whole name

upper or lower + right or left + position inside tooth group + PRIMARY + tooth
group

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8
Q

Handerup nomenclature system? (5)

A

(+ or-) and a number

    • for maxilla, - for mandible
  • symbol will be after the number for quadrants 1 and 4 and before the number for quadrants 2 and 3
  • lower case letters for primary
  • numbers for permanent
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9
Q

Zsigmondy-Palmer nomenclature system? (3)

A
  • symbol ( ┘, └, ┌, ┐) written for the quadrant
  • numbers for permanent teeth
  • lowercase letters for primary teeth
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10
Q

ADA notation system? (3)

A
  • used in USA
  • numbering starts at upper right third molar and ends at lower right third molar (1-32)
  • primary teeth CAPITAL letters used
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11
Q

FDI system? (5)

A
  • two digit notation
  • created by Viohl
  • first digit = quadrant
  • second digit = tooth from 1-8
  • primary quadrants numbered from 5-8, tooth from 1-5
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12
Q

Why is determining a tooth’s maturity useful? (4)

A
  • proper diagnosis
  • establish a good treatment plan
  • determine correct prognosis
  • ID a child’s age
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13
Q

Dental development is less affected by…? (3)

A
  • hormonal alterations
  • nutrition
  • environmental factors
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14
Q

Most reliable way to determine a child’s age?

A

looking at dental maturity

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15
Q

Ways to determine dental maturity? (2)

A
  • Nolla Method

- Demirjian method

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16
Q

What is the nolla method? (5)

A
  • 1960
  • to determine dental maturity
  • studied 25 girls and 25 boys
  • intraoral and lateral extraoral radiographies
  • described different calcification stages of the tooth at dif ages
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17
Q

How many nolla Stages exist?

A
  1. From 0-10
18
Q

What is nolla stage 0?

A

Absence of crypt

19
Q

What is nolla stage 1?

A

Presence of crypt

20
Q

What is nolla stage 2?

A

Initial calcification

21
Q

What is nolla stage 3?

A

1/3 of crown completed

22
Q

What is nolla stage 4?

A

2/3 of crown completed

23
Q

What is nolla stage 5?

A

Crown almost completed

24
Q

What is nolla stage 6?

A

Crown completed

25
Q

What is nolla stage 7?

A

1/3 root completed

26
Q

What is nolla stage 8?

A

2/3 of root completed

27
Q

What is nolla stage 9?

A

Root completed. Open apex

28
Q

What is nolla stage 10?

A

Apical end of root completed

29
Q

What do we do when a tooth under study is between two stages?

A

May add a fraction to our stage

30
Q

When do we add 0.2 fraction?

A

For nolla method when the tooth stage is a bit more than the proximate stage but does not reach the next stage

31
Q

When do we add 0.5 fraction?

A

For nolla method when the tooth is between two stages

32
Q

When do we add 0.7 fraction?

A

For nolla method when the tooth is a bit less than the most proximate stage

33
Q

What is the demirjian method?

A
  • determines dental maturity with panoramic xrays
  • 1973
  • most used
  • studied 2928 panoramic xrays
34
Q

How many demirjian stages are there? (3)

A

8 stages (A-H)

  • go from beginning of calcification until apex closure
  • now the letters have been replaced by numbers from 1-8
35
Q

What is demirjian stage A(1) ? (2)

A
  • First signs of calcification in the upper area of the
    crypt.
  • These calcification buds are not fused.
36
Q

What is demirjian stage B(2) ?

A
  • The calcification buds fuse together to conform a

regular occlusal area.

37
Q

What is demirjian stage C(3)? (4)

A

• Enamel formation is completed in the occlusal area.

-We may
appreciate its extension and its convergence to the cervical area.

  • A dentin deposit begins to show.
  • The pulp chamber outline has a curved form in the occlusal border.
38
Q

What is demirjian stage D(4)? (4)

A

• The crown formation is completed up to the amelocementary
line.
• In uniradicular teeth, the upper line of the pulp chamber has a
curved form. The pulp horns may give an umbrella aspect to the
pulp chamber.
• In multiradicular teeth the pulp chamber has a trapezoidal form.
• The beginning of the root formation is appreciated.

39
Q

What is demirjian stage E(5)? (4)

A

Uniradicular teeth:
• The pulp chamber walls form straight lines, only disrupted by the pulp
horns. These pulp horns are more accentuated than before.
• Root length is shorter than the crown´s height.

Molars:
• The initial formation of the furcation appears as a semilunar calcification
bud.
• Root length is shorter than the crown´s height.

40
Q

What is demirjian stage F(6)? (4)

A

Uniradicular teeth:
• The pulp chamber walls form a triangle. The apex has a funnel form.
• Root length is the same or bigger than the crown´s height.
Molars:
• The furcation has developed to define the roots. The apex have a funnel
form.
• Root length is the same or bigger than the crown´s height.

41
Q

What is demirjian stage G(7)? (2)

A
  • The root canal walls are more parallel.

-The root apex is
still partially open (specially in distal molar roots)

42
Q

What is demirjian stage H(8)? (2)

A

• Apex is totally closed.
• The periodontal ligament has a regular width around the
root and apex.