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d b review > 32. Orthodontics III COPY > Flashcards

32. Orthodontics III COPY 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:

24
Q

Responsible for ROOT development

✅ Shape and # of roots

25
HERS gives rise to:
Epithelial diaphragm
26
Responsible for shape and # of APEX
Epithelial diaphragm
27
Remnant of HERS
Epithelial rest of malassez
28
Can enamel regenerate? Dentin? Cementum?
Enamel - cannot!!! (Far from pulp = no blood supply) Dentin and Cementum ✅
29
BQ: what is the Indication for serial extraction??? | space indicated
Answer sa boards: 8mm
30
When to exo: C D 4
C - 8 D - 9 4 - ASAP
31
Key to success of SERIAL EXTRACTION (CD4)
Extract 1st PM before PERMANENT CANINE erupts!!!!
32
Failure of Serial exo is common to: Maxilla or Mandible??
Failure: Mandible | 61234578
33
Successful serial exo is common to: Maxilla or Mn?
Success: Maxilla | 61245378
34
Difference between Md width of CDE and 345
Leeway space
35
Formula for leeway space
Leeway space = CDE - 345
36
``` BQ: Leeway space is: a. Positive B. Negative C. Zero D. Nota ```
Positive!!!
37
Leeway space in the MAXILLA
1. 8mm - both sides | 0. 9mm - one side
38
Leeway space of MANDIBLE
3. 4 - both sides | 1. 7 - one side
39
Easiest orthodontic tooth movt
Extrusion
40
Most difficult ortho tooth movt but LEAST force required
Intrusion
41
Most common ortho tooth movt
Tipping
42
Only movt of removable appliances
Tipping
43
Center of rotation in ROTATION
Long axis
44
Center of rotation of incisors during TIPPING
2/3 apicocervically of root Or (1/3 cervicoapically of root)
45
Center of rotation of MOLARS
Bifurcation
46
Extrusion and Intrusion Rotation - Cor -
No rotation = NO center of rotation
47
BQ: Best rotational force
Coupling force (Couple)
48
Otho movt that has greatest force required
Translation (“bodily movt”) | - no center of rotation!!
49
Cells present on the side toward which tooth is being moved / TENSION SIDE!!!!
Osteoclast | tension side= bone resorption
50
Cells present of the side of the root from which the tooth is MOVED / PRESSURE SIDE!!!
Osteoblasts | Pressure side = bone apposition
51
BQ: Best force for ortho
Light continuous force { Light: frontal resorption = faster Heavy: undermining resorption }

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