Complete Dentures - Security and Liners

Question 1

Much of retention is derived from

Answer 1

Interaction between fitting surface and underlying surface of ridge

Question 2

Indications for liner

Answer 2

Differentiation in underlying surface leading to poor adaptation

Question 3

Temporary liner indication

Few weeks

Answer 3

Immediate denture - guesswork as ridge adaptation is estimated
Relief of pain
Conditioning of tissues
Functional impression material

Question 4

Permanent linings can be

Answer 4

Hard

Soft

Question 5

Hard permanent liners

Answer 5

Relining dentures due to poor fit
Additions to dentures
Placement of post dam

Question 6

Transitional liner

Answer 6

In between temporary and permanent

Question 7

Soft permanent liners

Not good in mandible due to

Answer 7

Relining
Tender mandibular ridge
To alleviate mental foramen
At least 4mm thick

Large SA to cover and retention needed

Question 8

Permanent liners - composition

Why is lab better

Answer 8

PMMA
Autopolymerising PMMA
Lab or chair-side

Higher degree of polymerisation
Less porosity

Question 9

Compression of impression will determine

So have to ensure that

Answer 9

Overall height of denture

Patient is biting down correctly

Question 10

Forms of silicone

Answer 10

Putty
Heavy bodied
Medium bodied
Light bodied

Question 11

Temporary liners tend to be

What is a FI material

Tconditioner over 2 weeks

Answer 11

Soft
Either fx impression materials or tissue conditioners

Adapts to shape over time - becomes less mouldable

Soft gel material which provides seal - long term denture fixative