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Flashcards in Occlusion Deck (56)
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1

what Angle class does the Triangular ridge of MB cusp of Max 1st molar articulates in B groove of Man 1st molar?

Class 1

**max canine between man canine and 1st premolar

*70% of pop

2

what percentage of pop has class 2?

25%

3

where does the MB cusp of Max 1st molar fall in angle class 2?

between 1st molar and 2nd premolar

4

in angle class 2 what direction do the max incisors tip?

bucally

5

what does "sunday bite" mean?

patient typically functions in a class 2 bite, but can go into class 1

*this can trick a dentist

6

Class 2 division 1

class II molar relationship with protruded Max incisors

7

class 2 division 2

max lat incisors tipped labially and mesial, centrals retruded

8

Describe class angle class 3 bite

Molars and canines

-MB cusp of Max 1st molar falls between Man 1st and 2nd molars

-Max canine distal to Man canine

*5% of pop

9

what is a skeletal class 1?

max and mand are similar in poportion

10

what is skeletal class 2?

mand is smaller than max

11

what is a skeletal class 3

mand is larger than max

12

what is the terminal plane and what is it used for?

Distal aspect of 2nd primary molars, used to determine amount of shift

13

What is leeway space?

size differential between primary posterior teeth and permanent canine and premolars

*2.5/side uppers
1.5/side lowers

*example perm premolar (smaller) erupts where there the primary molar (larger) was

14

what is a flush terminal plane relationship?

Molars are directly on top of each other.

normal relationship for primary teeth. Will shift to class 2, then eventually class 1 when primary molars are lost

15

What is a mesial step relationship?

Distal surface of Man molar mesial to Max

*usually shifts to class 1, but can shift to class 3

16

what is a distal step relationship?

Distal surface of Man molar Distal to Max

**Can shift to Class II or End to end

17

what is primate spacing?

-gap between Max lateral incisors and canines
-Gap between Man canines and 1st molars

18

6 keys to normal occlusion?

1-molar relationship
2-Crown angulation (gingiva is distal)
3-crown inclination (inclination)
4-elimination of rotation
5-tight contacts
6-flat occlusal plane

19

what is a facial/buccal crossbite?

posterior maxillary facial cusps contact mandibular fossa


*max non-functional cusps are in the fossa rather than functional ones

20

what is Lingual crossbite/scissor bite?

lingual inclines of maxillary lingual cusps contact buccal inclines of mandibular teeth

21

what muscle controls translation?

Lateral pterygoid muscle contracts and moves condyle-articular disk assembly forward

22

in rotation, how many mm before incisor separation?

12mm

23

what are the Overbite and overjets for anterior open bite?

negative overbite with positive or negative overjet

24

what do the max incisors cause in an anterior deep bite?

can cause retrusive force on mandible

25

in increased overjet the posterior cusps are ________ and in overbite the posterior cusps are ______

shorter, longer

26

what are the glenoid fossa and condylar disk covered with?

avascular fibrous tissue

27

what is the articular disk?

Dense connective tissue

28

what is the posterior aspect of the articular disk attached to?

retrodiscal tissue which is connected to the posterior wall of articular capsule

29

what are the medial and lateral walls of the articular disk connected to?

poles of condylar process

30

what is the anterior wall of the articular disk connected to?

superior lateral pterygoid muscle and capsule