32. Orthodontics III COPY Flashcards Preview

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Flashcards in 32. Orthodontics III COPY Deck (51)
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1

Conditions associated with supernumerary teeth ➡️ “Delayed eruption”

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

2

Other term for Gardner’s

Familial colorectal polyposis

3

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

Gardner’s

4

Ddx of garners
- with freckles
- # teeth
- polyps

Peutz jeghers syndrome
(HEREDITARY INTESTINAL POLYPOSIS)

5

Portwine stains - follows CN V!!

Sturge weber (encephaloTRIGEMINAL angiomatosis)

6

BQ: What is the most common supernumerary teeth?

Mesiodens

7

BQ: What stage of tooth development does supernumerary occur?

Initiation stage

8

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

24
(20 deciduous/4 perm 6s)

9

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

Initiation stage

10

Stage of tooth dev: morphodifferentiation
(Shape/maturation)

Bell stage

11

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

Bell stage

12

Stage of tooth dev: Histodifferentiation

Bell stage

13

Enamel organ gives rise to:

Enamel

14

Dental papilla gives rise to:

Dentin
Pulp

15

Dental SAC / FOLLICLE gives rise to:

Cementum
PDL
Alveolar bone

16

Ameloblasts are derived from?

Inner enamel epithelium

17

Cells that line dental pulp

Odontoblasts

18

Which is first to form: Ameloblasts or Odontoblasts?

Ameloblasts ➡️ Odontoblasts
(*remember A is first in the alphabet)

19

Which is first to form: Dentin or Enamel?

Dentin ➡️ Enamel
( First in the alphabet)

20

BQ: OEE + IEE =

REE (reduced enamel epithelium)

21

BQ: Initial membrane / barrier of enamel
(Ree but in erupted tooth already)

Nasmyth’s membrane or Primary enamel cuticle

22

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

Cervical loops

23

Cervical loop gives rise to:

HERS

24

Responsible for ROOT development
✅ Shape and # of roots

HERS

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