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.DENTAL BOARD EXAM REVIEWER > 32. Orthodontics III > Flashcards

32. Orthodontics III Flashcards

1
Q

Conditions associated with supernumerary teeth ➡️ “Delayed eruption”

A
  1. Gardner’s
  2. Down’s
  3. Cleidocranial dysostosis
  4. Sturge weber syndrome / Encephalotrigeminal angiomatosis
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2
Q

Other term for Gardner’s

A

Familial colorectal polyposis

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3
Q

Supernumerary teeth = Impacted (Clinical exam: Few teeth present) ; with polyps in rectum

A

Gardner’s

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4
Q

Ddx of garners

  • with freckles
  • # teeth
  • polyps
A

Peutz jeghers syndrome

HEREDITARY INTESTINAL POLYPOSIS

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5
Q

Portwine stains - follows CN V!!

A

Sturge weber (encephaloTRIGEMINAL angiomatosis)

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6
Q

BQ: What is the most common supernumerary teeth?

A

Mesiodens

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7
Q

BQ: What stage of tooth development does supernumerary occur?

A

Initiation stage

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8
Q

BQ: How many teeth are present in the radiograph of a newly born child?

A

24

20 deciduous/4 perm 6s

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9
Q

Stage of tooth dev: determines # of teeth; (Supernumerary)

A

Initiation stage

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10
Q

Stage of tooth dev: morphodifferentiation

Shape/maturation

A

Bell stage

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11
Q

Stage of tooth dev: Appositional stage (-deposition of enamel and dentin)

A

Bell stage

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12
Q

Stage of tooth dev: Histodifferentiation

A

Bell stage

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13
Q

Enamel organ gives rise to:

A

Enamel

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14
Q

Dental papilla gives rise to:

A

Dentin

Pulp

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15
Q

Dental SAC / FOLLICLE gives rise to:

A

Cementum
PDL
Alveolar bone

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16
Q

Ameloblasts are derived from?

A

Inner enamel epithelium

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17
Q

Cells that line dental pulp

A

Odontoblasts

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18
Q

Which is first to form: Ameloblasts or Odontoblasts?

A

Ameloblasts ➡️ Odontoblasts

*remember A is first in the alphabet

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19
Q

Which is first to form: Dentin or Enamel?

A

Dentin ➡️ Enamel

First in the alphabet

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20
Q

BQ: OEE + IEE =

A

REE (reduced enamel epithelium)

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21
Q

BQ: Initial membrane / barrier of enamel

Ree but in erupted tooth already

A

Nasmyth’s membrane or Primary enamel cuticle

22
Q

BQ: Oee + IEE in the “cervical area” forms:

A

Cervical loops

23
Q

Cervical loop gives rise to:

A

HERS

24
Q

Responsible for ROOT development

✅ Shape and # of roots

A

HERS

25
Q

HERS gives rise to:

A

Epithelial diaphragm

26
Q

Responsible for shape and # of APEX

A

Epithelial diaphragm

27
Q

Remnant of HERS

A

Epithelial rest of malassez

28
Q

Can enamel regenerate? Dentin? Cementum?

A

Enamel - cannot!!! (Far from pulp = no blood supply)

Dentin and Cementum ✅

29
Q

BQ: what is the Indication for serial extraction???

space indicated

A

Answer sa boards: 8mm

30
Q

When to exo:
C
D
4

A

C - 8
D - 9
4 - ASAP

31
Q

Key to success of SERIAL EXTRACTION (CD4)

A

Extract 1st PM before PERMANENT CANINE erupts!!!!

32
Q

Failure of Serial exo is common to: Maxilla or Mandible??

A

Failure: Mandible

61234578

33
Q

Successful serial exo is common to: Maxilla or Mn?

A

Success: Maxilla

61245378

34
Q

Difference between Md width of CDE and 345

A

Leeway space

35
Q

Formula for leeway space

A

Leeway space = CDE - 345

36
Q 
BQ: Leeway space is: 
a. Positive
B. Negative
C. Zero
D. Nota
A

Positive!!!

37
Q

Leeway space in the MAXILLA

A
  1. 8mm - both sides

0. 9mm - one side

38
Q

Leeway space of MANDIBLE

A
  1. 4 - both sides

1. 7 - one side

39
Q

Easiest orthodontic tooth movt

A

Extrusion

40
Q

Most difficult ortho tooth movt but LEAST force required

A

Intrusion

41
Q

Most common ortho tooth movt

A

Tipping

42
Q

Only movt of removable appliances

A

Tipping

43
Q

Center of rotation in ROTATION

A

Long axis

44
Q

Center of rotation of incisors during TIPPING

A

2/3 apicocervically of root

Or (1/3 cervicoapically of root)

45
Q

Center of rotation of MOLARS

A

Bifurcation

46
Q

Extrusion and Intrusion
Rotation -
Cor -

A

No rotation = NO center of rotation

47
Q

BQ: Best rotational force

A

Coupling force (Couple)

48
Q

Otho movt that has greatest force required

A

Translation (“bodily movt”)

- no center of rotation!!

49
Q

Cells present on the side toward which tooth is being moved / TENSION SIDE!!!!

A

Osteoclast

tension side= bone resorption

50
Q

Cells present of the side of the root from which the tooth is MOVED / PRESSURE SIDE!!!

A

Osteoblasts

Pressure side = bone apposition

51
Q

BQ: Best force for ortho

A

Light continuous force

{ Light: frontal resorption = faster
Heavy: undermining resorption }

.DENTAL BOARD EXAM REVIEWER (38 decks)

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