Class 2 div 2

Question 1

One of the keys to successful treatment of class 2 div 2

Answer 1

Successfully reducing and normalising interincisal angle

Question 2

Average interincisal angle

Answer 2

135 degrees

Question 3

2 developmental dental anomalies that can be associated with class 2 div 2

Answer 3

Impacted canine, lateral incisor microdontia

Question 4

What type of functional appliance can be used to treat class 2 div 2?

Answer 4

Modified twin block

Question 5

How does modified twin block work for class 2 div 2?

Answer 5

Convert to class 2 div 1 - proclination of upper incisors by either springs or screw or upper sectional fixed appliance

Question 6

Stable correction of class 2 div 2 needs what 2 things?

Answer 6

Overbite reduction, correction of inter-incisal angle

Question 7

Why is correction of inter-incisal angle needed?

Answer 7

Helps stability of overbite, if don’t correct this overbite will relapse

Question 8

Inter-incisal angle corrected by a combination of:

Answer 8

Palatal root torque of upper incisors and proclination of lower incisors

Question 9

When might orthognathic surgery be considered for treatment of class 2 div 2?

Answer 9

Malocclusion too severe for orthodontics alone, patient stopped growing, patient has profile or functioning concerns