Lecture 10 - Wax Try-In

Question 1

What seven things need to be checked off during the wax try-in appointment?

Answer 1

1. OVD
2. Centric relation
3. Protrusive relation record
4. Esthetics
5. Phonetics
6. Posterior palatal seal
7. Patient acceptance

Question 2

Make a facebow preservation first. Maxillary denture should be remounted on a plaster cast patty and mandibular cast should be remounted on a small plaster patty.

Answer 2

Clinical remount

Question 3

What base contours necessary to prevent cheek and tongue biting and improved phonetics?

Answer 3

1. Convex papilla/gingiva
2. Canine eminence
3. Vary height of gingival margins and papilla
4. Stipple attached gingiva

Question 4

Steps for processing CD

Answer 4

1. Find and clean matching cover, cope, and drag
2. Ensure cast and denture fit
3. Pour lower half of flask with stone and set cast in
4. Separation medium, place cope, then second stone just above occlusal surfaces
5. Third stone to fill cope, cover, and allow to set
6. Boil out, separate flasks, then clean and dry
7. Pack to 2000 pounds with full metal to metal contact
8. Bench cure 1 hour before heat processing cycle,

Question 5

Steps for deflasking

Answer 5

1. Remove metal flask
2. Remove excess plaster and stone
3. Return stone casts to index plaster for articulating
4. Lab remount to correct processing error (1 to 2 mm at guide pin)

Question 6

When do you reduce a cusp and when do you deepen fossa during lab remount?

Answer 6

Reduce cusp - high in centric and eccentric

Reduce fossa - when cusp is only high in centric, but not eccentric