Quiz 2 (Review slides 1-10)

Question 1

3 advantages to utilizing a Nonadjustable Articulator

Answer 1

1. Inexpensive. Plastic nonadjustable articulators are disposable
2. Because mounting procedures are arbitrary, small amount of time required to mount the casts on the articulator
3. Generally acceptable for single restorations provided anterior guidance is available to serve as a determinant for eccentric movement of the mandible

Question 2

Define Bennett Angle

Answer 2

In a laterotrusive movement, the angle at which the non-working condyle moves Medially (as measured in the horizontal plane)

Question 3

What is the purpose of the Face-bow transfer

Answer 3

Used to orient and mount the MAXILLARY cast on the articulator relative to the joints

Question 4

Face-bow transfer utilizes what 3 distinct reference points

Answer 4

Posterior: Hinge axis of each condyle (2)
Anterior: Arbitrary-established by manufacturer

Question 5

What is the main disadvantage of the Fully Adjustable Articulator

Answer 5

Expensive (more sophisticated articulator + pantograph) and more time is required to transfer information from the patient to the articulator

Question 6

5 points to Nature of Occlusal Prematurities

Answer 6

1. these are recorded and recognized as a “high” contact, before the patient closes all
2. First tooth contact in CENTRIC RELATION is a good example of an occlusal prematurity
3. The term prematurity implies that the contact is either on an incline or is in an area that is not considered stable (for the teeth and/or the condyles)
4. None of these contacts are proper Maximum intercuspation occlusal contacts
5. The mandible can be displaced anteriorly and/or laterally.

Question 7

In forward displacement of the Mandible, contact occurs where causing what?

Answer 7

Contact occurs on posterior teeth causing the mandible to be anteriorly displaced.

Question 8

Define “A” contact -

Answer 8

lingual inclines of maxillary facial cusps contacting facial inclines of mandibular facial cusps

Question 9

Define “B” contact -

Answer 9

Facial inclines of maxillary lingual cusps contacting lingual inclines of mandibular facial cusps

Question 10

Define “C” contact -

Answer 10

Lingual inclines of maxillary lingual cusps contacting facial inclines of mandibular lingual cusps

Question 11

Non-Working interferences usually cause what movement of the mandible

Answer 11

Lateral displacement of the mandible

Question 12

Non-working interferences are potentially observed on the following surfaces and features:
(4)

Answer 12

1. Lingual inclines of the mandibular posterior facial cusps
2. Facial inclines of the maxillary posterior lingual cusps
3. Parallel to the distofacial developmental groove - Mand. 1st Molars
4. Parallel to the distal oblique groove - Max 1st Molars