Recognition of Malocclusion & Angle Classification in the Permanent Dentition

Question 1

Angle recognized a ________ of A-P discrepancies in his patients and grouped them into Classes

Answer 1

pattern

Question 2

What is class I malocclusion?

Answer 2

• the A-P relations of the 1st molars are similar to Class I normal occlusion
• face profiles vary, but are often straight [normal].

Question 3

When is the best time to treat class I malocclusion?

Answer 3

in adolescence

Question 4

In the crowded malocclusions, teeth are ________ than normal; arch perimeter and arch widths are __________ than normal.

Answer 4

larger
smaller

Question 5

The discrepancy from normal in class I malocclusion involves either…

Answer 5

excessive crowding of the teeth, or excessive spaces between the teeth

Question 6

Answer 6

class I normal occlusion

Question 7

Answer 7

class II crowded malocclusion

Question 8

What is class II division 1?

Answer 8

• malocclusions involve lower teeth distal to the upper teeth with larger than normal overjet
• Facial profiles are usually convex & and associated with recessive mandibles
• Posterior cross-bites are common.

Question 9

What is class II division 2?

Answer 9

• malocclusions involve lower teeth distal to the upper teeth with lingually inclined upper central incisors, and deeper than normal overbite.
• Facial profiles may be convex.

Question 10

When is the best time to treat angle class II malocclusions?

Answer 10

in adolescence

Question 11

Answer 11

Mild Class II division 1 malocclusion (end to end canines)

Question 12

Answer 12

full class II divison 1 malocclusion

Question 13

Answer 13

full class II division 2 malocclusion

Question 14

What is class II malocclusion?

Answer 14

• the lower teeth are mesial to the
  upper teeth
• the malocclusion is associated with anterior and posterior cross-bites
• overbite varies, deep overbites are favorable for treatment
• Anterior open bite is very difficult to treat, without surgical treatment.

Question 15

When is the best time to treat class III malocclusions?

Answer 15

Expand the maxilla in adolescence. After facial growth is completed, assess the need for orthodontic only or surgical orthodontic treatment.

Question 16

Answer 16

mild class III malocclusion (molars are super 1)

Question 17

Answer 17

full class III malocclusion

Question 18

What is the 1st notation?

Answer 18

right 1st molars

Question 19

What is the 2nd notation?

Answer 19

right canines

Question 20

What is the 3rd notation?

Answer 20

left canines

Question 21

What is the 4th notation?

Answer 21

left 1st molars

Question 22

The notation E stands for…

Answer 22

End to End, a mild Class II malocclusion in molars and canines

Question 23

The notation SI stands for…

Answer 23

Super Class I, a mild Class III
malocclusion in molars and canines.

Question 24

The notation SII stands for…

Answer 24

super Class II, an exaggerated Class II malocclusion [rare].

Question 25

The notation SIII stands for…

Answer 25

super Class III, an exaggerated Class III malocclusion [rare].

Question 26

When assigning the Angle Classification, use the following principles:

Answer 26

• E is equivalent to II.
• SI is equivalent to III.
• SII is equivalent to II, SIII is equivalent to III.
• Classes E, SI, SII, and SIII are not equivalent to I.
• Normal occlusion [Class I normal occlusion] must be differentiated from Class I malocclusion.