Revision Complete

Question 1

What should be recorded on a primary impression for complete dentures?

Answer 1

Record all denture bearing areas, rolled sulcus, extended far enough posteriorly
-> Consider modifying stock trays with compound and greenstick

Question 2

What are finger rests good for?

Answer 2

Good if resorbed ridge, helps stabilise tray

Question 3

What are stub handles helpful for?

Answer 3

Border moulding

Question 4

What materials are used in close fitting trays?

Answer 4

ZOE

Light bodied silicone

Question 5

What are close fitting trays good for?

Answer 5

Resorbed ridges

Question 6

If you have no previous guide for mould what can help the technician ascertain?

Answer 6

Draw canine lines

Question 7

What are the uses of cuspless teeth?

Answer 7

Bruxism-allows excursive movements

Very resorbed lower ridge
-> displacement on excursions and occlusal interferences will not displace denture

Question 8

What curves are important when setting teeth?

Answer 8

Curve of spee- anterior posterior curve

Curve of Monson- coronal curve
-> Even bilateral contacts on excursive movements (in natural teeth we have canine guidance which would displace denture)

Question 9

What should be checked at try in stage in complete dentures?

Answer 9

Vertical dimension of occlusion

Even contact in retruded contact position

Lip support

Occlusal planes – anterior/posterior

Lower teeth over ridge

Speech

Retention & stability

Base extensions

Appearance

Question 10

What are the issues with try in stage?

Answer 10

Difficult to assess retention

Question 11

What are the steps in processing a try in to produce a denture?

Answer 11

Wax up

Flasking- put dentures in flask with plaster and melt out wax and replace with acrylic

Deflasking

Trim & polish denture

Question 12

What does a post dam do?

Answer 12

Creates posterior seal
-> compresses tissues to allow maintenance of seal

Question 13

What is checked on insertion of finished complete denture?

Answer 13

Vertical dimension of occlusion

Even contact in retruded contact position

Speech

Retention & stability

Base extensions

Appearance

Comfort

Question 14

How is extension checked?

Answer 14

Extensions- pull on cheeks and lips

Lateral movement of bottom jaw- shows overextension of the upper denture at the coronoid process (may need to adjust polished surface)

Question 15

What must labs producing prostheses be registered with and what law does this pertain to?

Answer 15

Labs must be registered with MHRA
 Medical device regulations 2019

Question 16

What is checked at review of complete dentures?

Answer 16

• Pain redness ulceration- pressure indicating paste
• Function
• Aesthetics
• Speech
• Recheck occlusion
• OVD (difficult to change)

Question 17

When are replica dentures indicate?

Answer 17

if patient well adapted to dentures and occlusion has changed very slightly/teeth have worn

Question 18

What are the clinical stages in complete denture treatment

Question 19

How are teeth set for complete dentures

Question 20

What are the ADV/DIS of replica technique?

Answer 20

ADV
Keeps existing design
Easier adaption
Maintains existing aesthetics
1 less appointment
Only 1 impression
Jaw reg is simpler
Easier to observe changes to original

DIS
Major modifications difficult
Can reproduce faults

Question 21

What are the advantages/disadvantages of conventional technique for complete dentures?

Answer 21

ADV:
Can be used if no previous denture, previous was unsuccessful

Can change aesthetic significantly

Major modifications and faults can be corrected easily

Good if significant resorption since original dentures made

DIS:
Takes longer

Complex jaw reg

2 impression stages required