Intro to ortho

Question 1

What 3 factors does orthodontics deal with?

Answer 1

Aesthetics
Function
Stability

Question 2

What does the index of orthodontic treatment needed (IOTN) measure?

Answer 2

Impact of malocclusion on individuals dental health and their psychosocial well being
Used to allocate acre in NHS

Question 3

What 2 components make up IOTN?

Answer 3

Dental health

Aesthetic

Question 4

How is the dental component of IOTN measured?

Answer 4

Grades occlusal traits which could effect function or longevity of dentition --> worse single feature not cumulative 
Grade 1 - no need
Grade 2 - little need
Grade 3 - moderate need 
Grade 4 - great need
Grade 5 - very great need

Question 5

How is the aesthetic component of IOTN measured?

Answer 5

10 photographs
Grade 1 - aesthetically pleasing
Grade 10 - least pleasing

5-7 = moder/borderline
8-10 = definite need

Question 6

What is interceptive orthodontics?

Answer 6

Early management of unerupted or impacted teeth

Balancing and compensating extractions

Question 7

Reason for extraction of teeth for ortho

Answer 7

Maintain centre lines, prevent overeruption

Relieve crowding

Question 8

Reason for balancing extractions?

Answer 8

Maintain centre line

Question 9

Compensating extraction?

Answer 9

Extraction of equivalent opposing tooth to prevent over-eruption

Question 10

How can skeletal discrepancy menifest?

Answer 10

Vertical facial proportion - (lower face hight_
Antero-posterior discrepancy
Transverse discrepancy

Question 11

How does dento-alveolar disproportion manifest?

Answer 11

Crowding or spacing

Question 12

Treatment for skeletal discrepancy

Answer 12

In a growing patient = growth modification

Adult patinet = orthognathic surgery

Question 13

HOw can skeletal discrepancy be corrected by growth modification?

Answer 13

Fixed appliance
Twin blocks
Medium opening activaor

Question 14

Class II bite?

Answer 14

Overjet

Question 15

Class III bite?

Answer 15

Protruded manidble