Copying and duplicating dentures

Question 1

Techniques

Answer 1

Simple
-to shorten denture making process
Complex
-when replacement must copy original to greater or lesser extent

Question 2

When would complex dentures be used

Answer 2

1. Elderly
2. When tolerance is compromised
3. When duplicate denture is needed

Question 3

Making a simple copy denture

Answer 3

A. Cast model from current denture
-model formed on denture using silicone putty
-can be used to provide model on which special trays can be made
B. Use alma gauge to form registration rims

Question 4

Making a complex copy denture

Answer 4

1. Make negative of dentures in alginate flask
2. Template in wax and acrylic
3. Make any adjustments to face height and send to lab in registered position
4. Mount, remove wax teeth and replace with acrylic teeth
5. Try in and reline impressions
6. Process and finish
7. Placement and check record

Question 5

Not all old dentures are ideal

Answer 5

They might have been faulty to begin with

Question 6

5. Try in and reline impressions

Answer 6

If try-in satisfactory, imp is taken in fitting surface of template and denture processed
Small > in face height can be expected and is often desirable
-if unwanted, can be compensated for at try-in by < face height slightly