Week 5

Question 1

What is the difference between Arbitrary and Kinematic hinge action?

Answer 1

Arbitrary hinge action = 13mm anterior to tragus on tragus-canthus line.

Kinematic Hinge Action = Pinpoint actual axis by means of pantograph.

Question 2

IMPORTANT!

What is the significance of Ear Bow transfer? (5 things)

Answer 2

1. Relates maxillary cast to the Terminal Hinge axis
2. Orients the maxillary cast correctly in space using a third point of reference (occlusal plane).
3. Is aligned parallel to the inter pupillary line.
4. permits mounting o f the maxillary cast on a semi-adjustable articulator.
5. The Mandibular cast is mounted using a centric relations (CR) record.

Question 3

What is Centric relation?

Answer 3

The maxillomandibular realtionship in which the condyles articulate with the thinnest avascular portion of their respective disks with the complex in the anterior- superior position against the shapes of the articular eminencies.

Question 4

True or False, Centric Relation is independent of tooth contact?

Answer 4

True, it is independent of tooth contact.

Question 5

CO=?

Answer 5

CO=MI

Question 6

Methods of recoding Centric Relation include……(3)

Answer 6

Bilateral Manipulation
Chin Point guidance
Anterior Deprogrammer