Selecting equipment

Question 1

What is the main function of articulators? (1)

Answer 1

To hold models in ICP

Question 2

Limit of simple hinge articulators (2)

Answer 2

Only hold models in ICP

Do not mimic opening movening as hinge is in wrong place

Question 3

Anatomical articulator required to (1)

Answer 3

Replicate jaw movements

Question 4

Example of an anatomical articulator (1)

Answer 4

Galetti

Question 5

Two relationships important to position models on an articulator (2)

Answer 5

Average relationship

Bonwill Triangle

Question 6

What does a facebow do? (1)

Answer 6

Records relationship between condyles and maxillary teeth

Question 7

What is an Earbow articulator? (2)

Answer 7

Facebow wherein external auditory canal used for convenience

Earbow arm compensates

Question 8

Average value anatomical articulators use which values? (2)

Answer 8

30 degree condylar angle

Straight condylar pathway

Question 9

Semi adjustable articulators use which values? (2)

Answer 9

Condylar path can be adjusted between 0 and 60 degrees
Condylar path is still flat
Intercondylar width and Bennet movement may also be adjusted on some models

Question 10

Fully adjustable articulators use which values? (3)

Answer 10

Custom made condylar pathways
Mechanically replicate the movements of the condyles
Use a pantograph or sterograph to record condylar movements

Question 11

Denar Automark or Combi use which values? (1)

Answer 11

Fixed 20 degrees condylar angle

Question 12

Selecting equipment depends on (3)

Answer 12

Occlusal scheme
Objectives of treatment
Clinician’s skill

Question 13

Ideal occlusion for complete dentures (5)

Answer 13

Balanced Occlusion
RCP – ICP
Working side contacts
Balancing (Non-working) side contacts
Protrusive contacts on incisors and posterior teeth

Question 14

Instruments used for complete dentures (in theory) (3)

Answer 14

Facebow transfer (because models will be moving)
Models mounted in CR
Reproduction of condylar movement
-condylar angle
-intercondylar width
-Bennett movement

Question 15

Anterior guided dentition - discluding teeth (3)

Answer 15

Contact in ICP
Disclusion elsewhere
We are relying on anterior guidance rather than the condyle to create disclusion here

Question 16

Instruments for anterior guided dentition (discluding) (4)

Answer 16

Facebow transfer
Models mounted in ICP (conforming)
20 degree condylar angle
Use average Bennett movement and intercondylar width

Question 17

Guiding teeth in anterior guiding dentition (3)

Answer 17

Care and attention required, either:

• check carefully in the mouth
• copy existing guidance on to articulator
• change guidance

Question 18

Instruments for guiding teeth in anterior guiding dentition (5)

Answer 18

Facebow transfer
Mount models in ICP
20 degree condylar angle
Use average Bennett movement and intercondylar width
Record anterior guidance

Question 19

Instruments for reorganising the occlusion (4)

Answer 19

Facebow transfer
Mount models in CR
20 degree condylar angle
Use average Bennett movement and intercondylar width

Question 20

Which dentitions require more attention? (2)

Answer 20

When posterior teeth contact in:

• protrusive excursions
• non-working side excursions