Pros Tutorials

Question 1

How does a flabby ridge form?

Answer 1

Forces diverted to anterior region
Upper denture displaces
Excessive+rapid bone loss in maxillary ridge
Replaced by excess fibrous tissue
Flabby ridge formed

Question 2

How is a flabby ridge managed?

Answer 2

Primary imps taken in alginate
Request special tray with window
Take master imp with medium bodied PVS
Light body on window area (prevents displacement + compression of flabby ridge)
Take 2nd imp of area
Send to lab and ask for record blocks

Question 3

When do we use cuspless teeth?

Answer 3

Resorbed ridge
Loss of OVD

Question 4

List some common types of denture fractures

Answer 4

Midline fracture
Clasp fracture
Tooth detaches from base
Loss of flange
Acrylic saddle detaches from CoCr baseplate

Question 5

Why do dentures fracture?

Answer 5

Impact
Acrylic in thin sections
Work hardening of metal
Parafunctional habits
Occlusion - deep OB
Soft linings
Porosity (processing issue)

Question 6

Repair of a midline fracture

Answer 6

If pieces can be located together disinfected + send to lab (no impression required)
Chair side cold cure acrylic if immediate

Question 7

Repair of acrylic flange lost

Answer 7

Imp taken with denture in mouth
Send imp + denture

Question 8

Repair of lost acrylic tooth

Answer 8

Self cure acrylic if tooth found
Chairside or lab

Question 9

Consideration if acrylic tooth lost multiple times

Answer 9

Occlusion wrong

Question 10

Repair of poor acrylic to CoCr bond

Answer 10

May need retentive tags to help bonding
4-META to retain acrylic

Question 11

When are denture strengtheners indicated?

Answer 11

Parafunctional/keep breaking

Question 12

RPD addition types

Answer 12

Immediate - same day of XLa
Post immediate - tooth lost after denture made
Retention - clasp added to improve retention

Question 13

How are RPD additions done clinically

Answer 13

Imp with denture in mouth
Temp fix with self cure acrylic if indicated

Question 14

Define reline + rebase

Answer 14

Reline - new base material added to tissue surface to fill space

Rebase - replace entire denture base material

Question 15

List the types of relines + indications for each

Answer 15

TEMP
- Tissue conditioning for irritated mucosa
Indications:
- Poorly fitting, immediates
- Replaced every 3 days

SOFT
Indications:
- Parafunction, atrophic ridges/cancer/cleft
- Improved comfort for weeks/months
- Heat/self cured acrylic or silicone

PERMANENT
- Denture loose otherwise no issues
- Peripheral seal issue or inadequate master imp

Question 16

Why is a silicone reline preferred?

Answer 16

Most successful
No residual monomer

Question 17

Function of a tissue conditioner (temp reline)

Answer 17

Shock absorber from masticatory force impact
Promotes healing of underlying inflamed mucosa

Question 18

Function of a soft reline

Answer 18

Improve comfort before new denture made from masticatory force impact