31. Orthodontics II Flashcards Preview

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Flashcards in 31. Orthodontics II Deck (129)
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1

3 classifications of Posterior crossbites based on the cause
✅ What is the treatment?

Dental - abnormal eruption
Functional - thumbsucking habit
Skeletal - bone constriction

✅Palatal expansion

2

Palatal expanders for PRE-ADOLESCENT (<12 y/o)

Expansion lingual arch
W arch
Quad helix

3

Most common / most conservative palatal expander

Expansion lingual arch

4

“Modified W arch”
Indications:
✅thumbsucker
✅needs palatal expansion

Quad helix

5

Palatal expanders for ADOLESCENT (>12 y/o)

Jackscrew
Surgery - cleft palate

6

BQ: Case:
👶🏻: 4y/o
#51 = non vital; rx none; asymptomatic; discolored

A. No tx
B. Exo
C. Pulpo
D. Pulpec

A. No tx
(- most conservative tx!)

7

BQ: Case:
#51 = swelling, pain, what initial procedure?

A. Exo
B. Pulpo
C. Pulpec
D. Ask for parents consent

D. Ask for parents consent

8

1 to 2 in anterior crossbite

Dental cause

9

Multiple teeth in anterior crossbite (>=3)

Skeletal cause

10

What is the most common cause of single tooth anterior crossbite?

Overly retained primary tooth/incisor

11

Treatment for single/2 teeth anterior crossbite? (Dental cause)

Inclined plane
✅Anchorage on: 4 perm mn incisors

12

Skeletal cause/>=3 anterior crossbite indicates that:

Developing skeletal class III
*Established skeletal class III

13

Tx for dev skel class III

Reverse pull/ facemask or chincup
(SA BOARDS: ✅Refer to orthodontist!!!!)

14

Tx for established skeletal class III

Surgery - BSSO
“bilateral sagittal split osteotomy”

15

Example of Functional anterior crossbite

Pseudoclass III
- Skel class 1 but during fxn = Skeleta class III

16

Patient adapts a jaw position upon closure which is forward to normal

Pseudoclass III

17

Vertical overlap

Overbite

18

Negative overbite

Openbite

19

Opposite arches cannot be brought into occlusion

Openbite

20

BQ: Most common cause of anterior openbite

Thumbsucking

21

Equilibrium/ balanced forces between muscles determines position of the teeth

Buccinator mechanism

22

Muscles involved in Buccinator mechanism

Buccinator
Orbicularis oris
Superior pharyngeal constrictor
(VS) Tongue

23

BQ: What is the triad of Thumbsucking?

Duration - 6hrs; most impt
Frequency - Am/pm
Intensity - 1 room away

24

BQ: What is the initial treatment for Thumbsucking?

1. Observe!!! - INITIAL ✅
2. Psychological therapy
3. Tape thumb
4. Tape elbow
5. Palatal crib - last resort

25

BQ: What is the appliance of choice for Thumbsucking?

Palatal crib

26

BQ: What is the treatment for OPEN BITE?

if caused by habit: ✅ Remove thumbsucking habit

If caused eruption pattern: ✅ no tx/ observe

27

Tongue protrudes during swallowing, speech, or even at rest

Tongue thrusting

28

BQ: most common cause of tongue thrusting

Thumbsucking
(thumbsuck - openbite - tongue thrust)

29

Infantile swallowing: what age

<1 y/o

30

Cranial nerve used during infantile swallowing

CN VII - Facial muscles are used by infants to swallow