Ortho Lab

Question 1

Ortho prescriptions for retract 13,23,
Retract 13,23 and reduce OB
buccaly placed 13,23 reduce OB
Anterior crossbite 12
Reduce oj 22,21,11,12 reduce OB
Extend upper arch

Answer 1

Question 2

Removable appliance advice for pt

Answer 2

Question 3

IOTN- index of ortho tx need components

Answer 3

Aesthetic components
Dental health component

Question 4

How do teeth move in ortho

Answer 4

Bone remodelling mediated by PDL

Question 5

Stainless steel composition

Answer 5

Iron 72%
Chromium 18
Nickel 8
Titanium 1.7
Carbon 0.3

Question 6

In the aesthetic component what tx is needed for each grade

Answer 6

1 2 3 4- no/minimal need
5 6 7- borderline need
8 9 10- requires ortho tx

Question 7

What is role of transpalatal arch? SS 0.9mm

Answer 7

Anchorage
Rotation
Limited widening or contraction

Question 8

What is role of palatal arch with nance button? SS 0.9mm

Answer 8

Anchorage

Question 9

What is role of quadhelix? SS 0.9mm

Answer 9

Bilateral expansion
Assymetrical expansion
Fan style expansion
Rotation of molars
Expansion in cleft palate
Modified to procline incisors
Assist in habit breaking

Question 10

Label

Answer 10

Transpalatal arch
Palatal arch with nance button
Quadhelix