Dupliactes

Question 0

What is a duplicate denture?

Answer 0

Intermediate relplica of the original denture which is then used to take a master impression record the CJR and then teeth cut off one by one and replaced to produce the trial denture

Question 1

What is a copy denitr?

Answer 1

Freehand reproduction of the appearance of a denture following a model produced from an impression of the denture

Question 2

When would you use a duplicate denture?

Answer 2

Previously satisfactory denture
Elderly and limited adaptation
When replacing an immediate denture where the position of the teeth are already known

Question 3

How many surfaces are there to a denture?

Answer 3

Fish 1931
Fit
Occlusal 
Polished 
Polished forces should conform to the shape and movement of the tongue cheeks and lips to minimise displacement

Question 4

What is the rationale behind duplicates ?

Answer 4

Patients learn to adapt to control new dentures buy the process of adaptation
Changes to wear of the denture occurs due to habituation
And it is more unlike that with age they can cope with new set of dentures
Inability to adapt to new changes

Question 5

What are the contra indications to duplicates?

Answer 5

No previously satisfied dentures

Question 6

What are the ad and dis of duplicates?

Answer 6

Ad: easy, less clinical time, sutubale, domiciliar
Dis: not all labs offer, some charge more

Question 7

What is rh technqiue to duplicates?

Answer 7

1; lab putty into custom tray that has been adhesived

2. Clean and dry Dentures and push into lab putty so edge is flush with lab putty
3. Once set place 3 locating notches
4. Put Vaseline on the outer surface to act as separating medium
5. Push a second layer of the lab putty on stop and squash down to with the top impression tray
6. Remove dentures and lab then pour autopolymersising acrylic into mould
7. Second imps taken in acrylic mould in silicone or zinc oxide need to make sure remove any undercuts
8. If you want to increase OVD add wax to occlusal surface and record CJR
9. Shade of teeth and check position of post dam
10. Lab then set up teeth by cutting teeth one by one
11. Try this in
12. Process to finish

Question 8

Which features is it possible to canoe when using copy techqniue?

Answer 8

Extension
OVD
Appearance