Nairn Tutorial Summary

Question 1

Function of study models

Answer 1

Appliance design
Diagnostic purposes

Question 2

What is the ideal tooth movement per month

Answer 2

1mm

Question 3

List advantages of URA’s

Answer 3

Tipping of teeth
Anchorage
Cheaper
OH easier

Question 4

List disadvantages of URA’s

Answer 4

Less precise control
Compliance
Can’t correct rotations

Question 5

List the components of compliance design

Answer 5

1. Active components
2. Retentive components
3. Anchorage
4. Baseplate

Question 6

Define an active component

Answer 6

Any component that moves teeth through force

Question 7

Define a retentive component

Answer 7

Resistance to displacement forces that may dislodge appliance

Question 8

Define anchorage

Answer 8

Resistance to unwanted tooth movement

Question 9

Define function of a baseplate

Answer 9

Oral seal (adhesion+cohesion)
Anchorage
Made in self cure PMMA

Question 10

List examples of retentive components

Answer 10

Adams clasp 0.7mm HSSW
Southend clasp 0.7mm HSSW
Labial bow 0.7mm HSSW

Question 11

List examples of active components

Answer 11

Finger spring + guard 0.5mm HSSW
Z spring 0.5mm HSSW
Flapper spring 0.5mm HSSW
T spring 0.5mm HSSW
Buccal canine retractors 0.5mm HSSW + ID tubing
Roberts retractors 0.5mm HSSW + ID tubing

Question 12

Function of a FABP

Answer 12

Reduces OJ

Question 13

Function of a PBP

Answer 13

Probs bite open

Question 14

OJ risks

Answer 14

Aesthetics
Trauma
Function
Lip trap/incompetent lips