RPD

Question 1

What is Kennedy Class I?

Answer 1

Bilateral free end saddles

Question 2

What is Kennedy Class II?

Answer 2

Unilateral free end saddles

Question 3

What is Kennedy Class III?

Answer 3

Unilateral bounded saddle

Question 4

What is Kennedy Class IV

Answer 4

Anterior bounded saddle that crosses the midline

Question 5

What is meant by support?

Answer 5

Resistance of a denture to occlusally directed loads

Question 6

What components are used to provide support for dentures against vertical loads?

Answer 6

Rest seats

Question 7

What is meant by retention?

Answer 7

Used to describe the resistance of a denture to lifting away from the tissues (vertical dislodging forces)

Question 8

What components achieve retention in a denture?

Answer 8

Clasps

Question 9

What is direct retention?

Answer 9

Resistance to vertical displacement of denture

Question 10

What is indirect retention?

Answer 10

Resistance to rotational displacement of denture

Question 11

What components are used in an RPI?

Answer 11

Mesial rest
Proximal guide plane
Gingivally approaching I-bar clasp

Question 12

When is an RPI used?

Answer 12

Used in free end saddle designs to prevent stress on the last abutment tooth- predominantly mandibular arches

Question 13

What is stability?

Answer 13

Resistance of a denture to displacement (by functional forces) in a horizontal direction

Question 14

Why do Dentures fractures?

Answer 14

Impact
Acrylic in thin sections
Work hardening of metal
Parafunctional habits
Occlusion
Soft linings
Bonding between tooth & base acrylic

Question 15

How do you fix a midline fracture of complete dentures?

Answer 15

If fractures pieces can be located together, disinfect and send to the lab
-No impression needed

Question 16

How do you repair a denture if part of the acrylic flange is lost?

Answer 16

Impression taken with fractured denture in mouth, disinfected, case poured and new acrylic processed into defect

Question 17

When are strengtheners used in dentures?

Answer 17

In patients that repeatedly break dentures or patients with parafunctional habits

Question 18

What is ICP?

Answer 18

Intercuspal position
The complete intercuspation of the opposing teeth independent of condylar position

Question 19

What is RCP?

Answer 19

Retruded contact position
Guided occlusal relationship occurring at the most retruded position of the condyles in the joint cavities
Reproducible position

Question 20

What are index teeth?

Answer 20

Contacting facets of teeth in the intercuspal position
Need to have enough meeting to achieve a stable occlusion

Question 21

What is the most commonly used articulator?

Answer 21

Average value (fixed condylar articulator)
Condylar guidance track is fixed at an average value

Question 22

Why reline dentures?

Answer 22

Fitting surface is inadequate but otherwise the denture is okay

Question 23

Why rebase a denture?

Answer 23

When you want to keep the occlusal surface but change the fitting and polished surface

Question 24

What is the method for relining a denture?

Answer 24

Remove undercuts from dentures fitting surface using acrylic bur
If underextended can add greenstick where needed
Functional impression- Light bodied silicone in denture fitting surface and get pt to bite down as take the impression

Question 25

What to write on denture lab card for reline?

Answer 25

Please pour up impression in 100% dental stone using reline impression with denture provided. Please mount upper to cast and create a self cure PMMA reline to change the impression surface.

Question 26

What is the first stage of replica dentures?

Answer 26

Place putty in denture tray Sit denture in putty Ensure that the phalanges are level with the material Cut notches in the top to differentiate the two halves Cover putty with vaseline Place putty over fitting surface

Question 27

What is the second stage of replica dentures?

Answer 27

Take functional impression with light bodied silicone on the fitting surface whilst taking bite registration Check occlusion and FWS

Question 28

What are the local measures to treat denture induced stomatitis?

Answer 28

Brush the palate daily Clean dentures thoroughly and give denture hygiene instruction Leave their dentures out as often as possible New dentures once problem has resolved

Question 29

What is the treatment for denture induced stomatitis?

Answer 29

Miconazole- send 80g tube, apply pea-sized amount to fitting surface of upper denture after food 4x daily Fluconazole 50mg tablets 7 capsules 1x daily Nystatin- oral suspension send 30ml, 1ml after food 4xdaily for 7 days. Pt has to rinse and then hold suspension in mouth for 5 mins before swallowing.

Question 30

What is denture induced stomatiits?

Answer 30

Inflammatory condition caused by overgrowth of candida in the mouth

Question 31

What can cause denture stomatitis?

Answer 31

Poor oral hygiene Ill-fitting dentures Lack of regular cleaning