Lecture 9

Question 1

Centric relation

Answer 1

anything after

rotation when the mouth opens

Question 2

We have no control over

Answer 2

translation

Only control rotation.

Question 3

B can be

Answer 3

bit on, won’t be painful

Question 4

Brace condyle against

Answer 4

superior
inferior portion of fossa* key
element

Question 5

PRP: at this point,

Answer 5

central incisors are related to the MI position, but not closed.
They are suspended in space.

Not really at rest, work still done to suspend in space, but teeth are not touching.

Question 6

Coronal Plane Tracing of the Range of Movement

Answer 6

Go from canine tip to canine tip, then go all the way out.

Question 7

Effect of Intercondylar Distance on Mandibular Lateral Movements

Answer 7

Has effect on cusp hight and angulation

Question 8

The Orthopedically Stable Joint Position

Answer 8

Optimal joint relationship is achieved only when the articular disks are properly interposed between the condyles and the articular fossae (CR).
In this position, the articular surfaces and tissues of the joints are aligned such that forces applied by the masculature do not create any damage.

Question 9

Optimal Functional Tooth Contacts

Answer 9

The musculoskeletally stable joint position can only be maintained when it is in harmony with a stable occlusal position.

Question 10

More teeth contacts provide more

Answer 10

stabilization of the mandible, and decrease the forces to each tooth.

Question 11

Even and simultaneous contact of all

Answer 11

teeth during mandibular closure.

Question 12

Optimal tooth contact

Answer 12

 CO coincides with MI (CO=MI).

Question 13

Direction of Occlusal Forces -  Osseous tissues do not

Answer 13

tolerate pressure forces.

Question 14

Direction of Occlusal Forces - The PDL is present between the

Answer 14

roots and the alveolar bone to control these forces.

Question 15

Supraeruption - tooth keeps

Answer 15

coming up to meet opposing tooth

Question 16

Axial Loading

Answer 16

Cusp tip to flat surface, tripodization

Question 17

Mutually Protected Occlusion - In maximal intercuspal position, posterior teeth come into

Answer 17

contact and act as stops to minimize horizontal load on anterior teeth.

Question 18

Mutually Protected Occlusion - The anterior teeth guide

Answer 18

excursive movements of the mandible so that no posterior teeth contacts occur during lateral or protrusive excursions.

Question 19

Effects of Tooth Loss

Answer 19

1. Supraeruption
2. Tilting
3. Loss of contact
4. Loss of posterior tooth support
5. Loss of vertical dimension
6. Flaring of anterior teeth
7. Non-working interferences

Question 20

Occlusal Treatment Goals 1. To direct

Answer 20

occlusal forces along the long axes of teeth (stable

posterior contacts).

Question 21

Occlusal Treatment Goals 2. In MI position, all mandibular teeth should

Answer 21

contact their maxillary opponents at the same time and with same intensity (CO=MI).

Question 22

Occlusal Treatment Goals 3. To furnish a smooth

Answer 22

protrusive path guided by the anterior teeth without any interference from occlusal contacts between the posterior teeth (posterior disclusion).

Question 23

Occlusal Treatment Goals 4. Working contacts (canine guidance or group function) should not be

Answer 23

prevented from contacting by non-working interferences.