05. Final Impressions

Question 1

Primary support areas for a maxillary RCD?

Answer 1

1. Palate
2. Posterior residual ridge
3. Tuberosities

Question 2

Primary support areas for mandibular RCD?

Answer 2

1. Buccal shelves

2. Posterior residual ridges

Question 3

What are five aspects critical for retention in prosthodontics?

Answer 3

1. Adhesion
2. Cohesion
3. Interfacial surface tension
4. Mechanical locking into undercuts
5. Peripheral seal (requires border molding)

Question 4

What tissue requires special attention (per CDR Petrich)?

Answer 4

Buccal frenum

Question 5

Base thickness of cast?

Answer 5

15-16 mm

Question 6

Green stick flows easily (most brittle), followed by gray , then red (highest/strongest) - good for short borders), then white and black

Answer 6

Green, gray, red (then white and black)

In terms of flows easily to flows thickest

Question 7

During maxillary final impression, you move the mandible left and right to make clearance for what?

Answer 7

Coronoid notch