Adult Malocclusion recognition

Question 1

when did angle publish classes of malocclusion

Answer 1

1899

Question 2

angle published classes of malocclusion based on:

Answer 2

anterior posterior positions of upper and lower teeth when they are in centric occlusion or MI

Question 3

the angle classes are based on ______ not ______

Answer 3

anatomic characteristics; etiologic basis

Question 4

when is angle classification not based on the AP relationships of the U/L permanent first molars

Answer 4

to distinguish class 2 div 1 from class 2 div 2

Question 5

describe class I malocclusion

Answer 5

the AP relations of the 1st molars are similar to class I normal occlusion
- face profiles vary but are often straight/normal

Question 6

what does the discrepancy in class I malocclusion involve

Answer 6

excessive crowding of the teeth or excessive spaces between teeth

Question 7

in crowded malocclusions teeth are ____ than normal

Answer 7

largeri

Question 8

in crowded malocclusions arch perimeter and arch widths are ____ than normal

Answer 8

smaller

Question 9

when is the best time to treat class I malocclusion

Answer 9

in adolescence

Question 10

describe class I division 1 malocclusions

Answer 10

• involve the lower teeth distal to the upper teeth with larger than normal over-jet
• facial profiles are usually convex and associated with recessive mandibles
• posterior cross bites are common

Question 11

describe class II division 2 malocclusions

Answer 11

• 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 12

when is the best time to treat class II malocclusions

Answer 12

adolescence

Question 13

when are end to end canines and first molars seen

Answer 13

mild class II div 1

Question 14

describe class III malocclusions

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

in mild class III malocclusion molars are:

Answer 16

super 1

Question 17

when might the upper second molar may not occlude with a lower molar

Answer 17

class III

Question 18

how are notations written

Answer 18

as you face the patient from left to right
- first notation is for right first molars
- second notation is for the right canines
- third notation is for the left canines
- fourth notation is for the left first molars

Question 19

what do the notations describe

Answer 19

the continuous A-P variations from class II to class I and to class III malocclusions and the asymmetric AP relations observed in malocclusions (biological variation)

Question 20

what does E stand for

Answer 20

end to end- a mild class II malocclusion in molars and canines

Question 21

what does SI stand for

Answer 21

super class I - a mild class III malocclusion in molars and canines

Question 22

what does SII stand for

Answer 22

super class II - an exaggerated class II malocclusion - rare

Question 23

what does SIII stand for

Answer 23

a super class III - an exaggerative class III malocclusion - rare

Question 24

E is equivalent to

Answer 24

II

Question 25

SI is equivalent to:

Answer 25

III

Question 26

SII is equivalent to:

Answer 26

II

Question 27

SIII is equivalent to:

Answer 27

III

Question 28

classes E, SI, SII, SIII are not equivalent to:

Answer 28

I

Question 29

are asymmetric malocclusion in the permanent dentition common

Answer 29

no

Question 30

what are the classes for class II division 1, subdivision R:

Answer 30

II,II, I ,I

Question 31

what are the calsses for class II division 2, subdivision L

Answer 31

I,I,II,II

Question 32

what are the classes for class III subdivision R:

Answer 32

III, III, I , I

Question 33

what are the rare asymmetric malocclusions

Answer 33

• class II - class III
• class III - class II