Complete dentures

Question 1

What material is used to pour casts of primary impression?

Answer 1

Plaster

Question 2

What material is used to make special trays?

Answer 2

Light cure material acrylic

Question 3

When would you use a close fitting tray instead of a one with 2-3mm spacer and what material would you use to take the impression?

Answer 3

• in resorbed ridges
• medium or light body silicone , or impression paste (ZOE)

Question 4

What is this?

Answer 4

Post dam ( on vibrating line) which is marked with a pencil

Question 5

How would you modify this if you have a retching patient?

Answer 5

Mark a second post dam anterior to this , to modify the denture later if needed by cutting a second post dam

Question 6

What two materials can you enforce the record blocks with?

Answer 6

• Shellac base
• Heat cured acrylic baseplate

Question 7

Which line helps with getting the anterior occlusal plane during jaw registration?

Answer 7

• interpupillary line

Question 8

Which line helps with getting the posterior occlusal plane?

Answer 8

Ala-tragus line

Question 9

What would you use to helps adjust the record blocks?

Answer 9

• Fox’s occlusal plane

Question 10

What is the first line that you will mark in the record block?

Answer 10

Centreline

Question 11

How would you ensure you get the correct horizontal component of the occlusion in the jaw registration stage?

Answer 11

Get the patient mandible in a retruded position

Question 12

What will you use to aid measuring the freeway space?

Answer 12

• dividers
• willi’s bite gauge

Question 13

How would you seal the upper and lower record blocks?

Answer 13

Cut notches and seal with registration paste

Question 14

What would you tell the lab to do after taking the jaw reg?

Answer 14

• mount the casts on an articulator and set up the teeth

Question 15

Other than registering the occlusion, what else would you do in the jaw reg stage?

Answer 15

• Choose shade of teeth
• Setting of teeth
• Mould of teeth

Question 16

When will consider using cuspless teeth?

Answer 16

• When the patient struggles to get into retruded contact position (resorbed ridges)

Question 17

How would the lab set the teeth on the wax trial?

Answer 17

• upper anteriors then posteriors then upper to lower

Question 18

What 6 things would you check in try in stage?

Answer 18

• Vertical dimension of occlusion
• Even contacts in RCP
• Lip support
• Occlusal planes
• Lower teeth over ridge
• Speech
• Retention and stability
• Appearance
• Base extensions

Question 19

When would you review the patient after delivering the denture?

Answer 19

1-2 weeks

Question 20

What 6 things would check when inserting the denture?

Answer 20

• Vertical dimension of occlusion
• Even contacts in RCP
• Speech
• Retention and stability
• Base extensions
• Appearance
• Comfort

Question 21

What would you give the patient before they leave? and under which legislations is that stated?

Answer 21

• Statement of manufacture - Give them a copy of the laboratory prescription
• Medical devices regulations 2019

Question 22

What 5 things would you review at review stage?

Answer 22

• Pain, redness , ulceration
• Function
• Speech
• Aesthetics
• Recheck occlusion and vertical dimension

Question 23

A patient comes back at review appointment and is complaining of pain, what would you do?

Answer 23

• Put PIP on fitting surface
• fit in and adjust high spots (using acrylic bur and straight handpiece)

Question 24

What are 3 advantages of replica dentures over conventional dentures?

Answer 24

• Easier to adapt as same design
• Maintain current aesthetics
• 1 less clinical stage ( only one impression in the mouth)

Question 25

What is the disadvantage of replica dentures?

Answer 25

Major modifications is difficult

Question 26

When would you use a conventional denture over a replica? 2

Answer 26

* if no previous denture * previous denture is poor or unsuccessful

Question 27

What is the advantage of conventional over replica?

Answer 27

Can make major modifications on it and correct faults more easily

Question 28

What is a disadvantage of conventional compared to replica?

Answer 28

* Takes longer * Changes appearance significantly and patient needs time to adapt