Replica Dentures

Question 1

In terms of clinical stages, what is the difference between replica and conventional dentures?

Answer 1

Replica has one less clinical stage- the master impressions and occlusion are registered at the same appointment.

Question 2

When might you consider doing a replica denture?

Answer 2

Patient wants a spare denture

Staining of current denture

Worn teeth/overclosure but overall happy with aesthetics and fit

Improve tooth position

Fractured baseplate or teeth.

Question 3

How do you take a primary impression for a replica denture?

Answer 3

Putty matrix into a dentate tray and then place denture into the tray.

Putty over the top and another tray on top of this.

So you get an impression of the fitting surface and the occlusal surface.

Question 4

What do you ask the lab for after primary impression stage?

Answer 4

Record blocks

Question 5

What do you check at the record block stage?

Answer 5

Occlusion- balance occlusion
OVD, RVD and freeway space
Base extension
Extension into the buccal and lingual sulci
Tooth position

Modify as required

Question 6

What material do you use for master impressions for a replica denture?

Answer 6

Light bodied silicone

Question 7

What is the closed mouth technique?

Answer 7

Put both trays in the mouth to take the impressions and then gently bite together- so the impression isn’t squint.

Question 8

How do you register the occlusion for a replica denture?

Answer 8

Using bite registration paste on the posterior aspects of the replica block.

Cut relocation notches onto them to relocate them afterwards.

Question 9

You’ve taken the master imps and recorded the occlusion, what do you do next?

Answer 9

Take a shade and a mould.