AP discrepancies

Question 1

The Class II malocclusion is among the most common developmental anomaly with a prevalence around ___% in most populations.

Answer 1

30%

Question 2

__% of malocclusions are class 1

Answer 2

70%

Question 3

___% of class 2 malocclusions are bimaxillary retrusive

Answer 3

40%

Question 4

Maxillary first molar in a mesial position in relation of the mandibular
first molar.

Answer 4

Class 2

Question 5

• Convex profile, mandibular retrognathism, variable face height ( dep bite or
  openbite ) , Increased overjet

Answer 5

Class II Division 1:

Question 6

• Straight to convex profile, Lower face height reduces, normal overjet, deep
  overbite, upper central Incisors lingually inclined, upper lateral incisors labially
  inclined

Answer 6

Class II Div 2

Question 7

Which division of class 2 is more difficult to treat?

Answer 7

Class II Div 2: genetic

Question 8

• In severe cases, the lips are usually
  incompetent.
• Proclination of upper incisors.
• Increased overjet.
• Narrow and tapered upper maxillary arch.

Answer 8

Class 2 Div1

Question 9

• Vertical dimension of these patients is usually decreased
• Dental crowding is created by the retro inclination of the upper incisors
• Deep overbite caused by the overeruption of upper central incisors
  and lower incisors .

Answer 9

Class 2 div 2

Question 10

How do you classify maxillomandibular relationships in skeletal class 2 relationships?

Answer 10

ANB via ceph

Question 11

Growing patients: Ideally, treatment of Class II malocclusions should focus first
on improving the _______

Answer 11

skeletal discrepancy.

Question 12

What functional appliance can be used to shift a class 2 malocclusion to class 1

Answer 12

Headgear

Question 13

What is necessary most of the time for class 2 skeletals for adults?

Answer 13

Orthognathic surgery

Question 14

(Removable functional appliance to correct class 2 malocclusions)
_____ is used more often,
which can efficiently promote mandibular growth, restrict further forward
growth of the maxilla, and improve skeletal relationships in growing skeletal
class II individuals with mandibular retrusion.

Answer 14

Twin‐block

Question 15

Are class 2 elastics good for small or larger class 2 corrections

Answer 15

Smaller corrections

Question 16

What is usually done to the maxillary arch in addition to the orthognathic surgery in extreme class 2 malocclusions?

Answer 16

Maxillary expansions

Question 17

What is the most complicated malocclusion to treat?

Answer 17

Class 3

Question 18

What is the main issue in most cases of class 3 malocclusions?

Answer 18

Maxillary deficiency (70%)

Question 19

• Extraoral features :
• Concave profile.
• Anterior facial divergence.
• Prominent lower third of face/chin.
• Intraoral features :
• Class III molar and canine relationship.
• Narrow upper arch.
• Decreased or reverse overjet.
• Crowding in upper arch.

Answer 19

Class 3 malocclusion

Question 20

______ malocclusion is characterized by:
* Anterior crossbite
* Due to a forward functional
displacement of the mandible.
* CR –Co Shift
*Not a true Class III malocclusion
if corrected early

Answer 20

Pseudo-Class III

Question 21

In most cases, __________ is the main etiological factor of a
pseudo-Class III malocclusion.

Answer 21

retroclined maxillary
incisors

Question 22

When should pseudo class 3 malocclsions be treated? age

Answer 22

8-9 years old

Question 23

What is used to correct class 3 malocclusions in growing pts?

Answer 23

Reverse-pull headgear

Question 24

What can occur with orthodontic treatment of a class 3 malocclusion in regards to elastics and inclination of incisors?

Answer 24

Overproclination of upper incisors and retroclination of lower incisors