Dynamic Occlusion

Question 1

Asymmetrical movements

Answer 1

Aka eccentric

Question 2

What plane is posselts diagram in eccentric movement

Answer 2

Frontal plane

Question 3

What are d and e in frontal plane

Answer 3

The limit of lateral movement

Question 4

Mandible moves to the

Answer 4

Working side

Question 5

Working vs non working side

Answer 5

Working- side of mandible that moves away from the midline

Non working- side of mandible that moves toward the midline

Question 6

Another name for working side

Answer 6

Laterotrusive

Question 7

Describe right working movement

Answer 7

LEFT lateral pterygoid working

Translates LEFT condyle down, forward, and in forming Bennett angle

RIGHT condyle rotates around axis

Mandible moves to the RIGHT

Question 8

Bennett angle

Answer 8

Angle formed by the pathway of the non working condyle

Question 9

MI to c

C to d

Answer 9

Mi to c is the Result of canine guidance aka gliding over each other

C to d is the result of condylar guidance on NON WORKING side

Question 10

Canine guidance and condylar guidance

Answer 10

When canines on working side disocclude the posterior teeth

As teeth open more, condylar guidance on the non working side

Question 11

Horizontal vs lateral condylar guidance

Answer 11

Horizontal is symmetrical movement of the mandible

Lateral is asymmetrical movement of the mandible

Question 12

Christensens phenomenon

Answer 12

Creation of a space between the posterior teeth bilaterally during protrusion of on the non working side during lateral movement

Question 13

Working interference

Answer 13

Unwanted contact on the WORKING side during canine guidance

Occlusal table is too high in certain areas, causes deviation of mandible

Question 14

Non working interference

Answer 14

Unwanted contact on the NON WORKING side

Destructive in nature

Question 15

Eccentric interference

Answer 15

One tooth hits before the others, it will bear much more force
Causes the jaw to deflect before other teeth can occlude
TMJ put into abnormal position, stress causes damage to ligaments/muscles (opposite side of premature contact)

Antagonists become tired and sore

Question 16

Mutually protected occlusion

Answer 16

When the front teeth protect the back teeth through canine guidance during excursive movement

And back teeth mutually protect the front teeth by directing the force of occlusion to relieve pressure of front teeth, during MIP

Question 17

Group function

Answer 17

When patients have teeth that are not capable of canine guidance, multiple posterior teeth contact on the working side during lateral movements

Not as desirable as canine guidance

Question 18

Posselts diagram in horizontal plane

Answer 18

Symmetrical and asymmetrical movement

IP to d - right working
IP to e - left working
IP to a- symmetrical protrusive

Question 19

Bennett movement vs Bennett angle

Answer 19

Movement- WORKING side movement of the condyle

Angle- pathway of the NON WORKING condyle