Prosthetics

Question 1

what are the stages of denture making? (5)

Answer 1

• 1st imps
• 2nd imps
• occlusion
• try in
• fit

Question 2

what anatomical difficulty can give issues to the denture making process? (2)

Answer 2

tori

flabby ridge

Question 3

reline/rebase full and partial dentures

- What is the difference in the steps? (3)

Answer 3

full
- take wash imps only

partial

• take wash imps +
• alginate over denture

Question 4

-/f denture retention is affected by? (2)

Answer 4

• extension

- position of teeth in neutral zone

Question 5

if tooth preparation is required for denture, when should the prep by then?

Answer 5

before 2nd imps

Question 6

what are the steps for a f/f replica?

• 1st appt (4)
• 2nd appt (3)
• 3rd appt (1)
• 4th appt (1)

Answer 6

1st imps

• putty on tray and insert f/f
• create notches on putty
• place another putty over denture
• prescribe for wax block with SHELLAC base

2nd imps

• adjust occlusion
• wash imps
• choose shade and shape

try in

fit

Question 7

what is the ideal FWS?

Answer 7

2-3mm

Question 8

what is checked during occlusion stage? (3)

Answer 8

• occlusal plane level (runs)
• labial fullness
• mark midline

Question 9

what is checked during try in? (6)

Answer 9

adaptation
extensions
runs
appearance
labial fullness
occlusion

Question 10

what is the ideal post-dam thickness? (2)

Answer 10

0. 5mm when palate is compressible

0. 25mm if there is a palatal tori

Question 11

what are the types of impression taking techniques?

Answer 11

closed mouth

open mouth

Question 12

clasps used in partial dentures.

• types (2)
• material (2)
• when to use (2)

Answer 12

occlusal approaching

• CoCr
• provides bracing

gingival approaching

• stainless steel
• more aesthetic

Question 13

what is the definition of

• retention
• support
• stability

Answer 13

retention
- resistance to vertical displacement away from denture bearing area

support
- resistance to vertical force of occlusion

stability
- resistance to lateral displacement during function

Question 14

what tooth preps can be made as part of denture design?

Answer 14

rest seats

creating undercuts

Question 15

for 2nd imps, how much space is needed for alginate shellac base for an accurate impression?

Answer 15

3mm

Question 16

what is checked during the try in stage? (4)

Answer 16

adaptation
retention
extension
appearance

Question 17

what is the purpose of a facebow?

Answer 17

transfer relationship of maxillary arch and TMJ to cast

Question 18

facebow

• types (2)
• what is it (2)
• where is the locating point (2)

Answer 18

kinematics

• more accurate and complex
• locates terminal hinge axis of condylar rotation.

arbitrary or “earbow”

• more commonly used
• uses ear as locating point

Question 19

articulars

- types (3)

Answer 19

• simple hinge
• semi adjustable
• fully adjustable

Question 20

what is Bennet’s movement? (3)

Answer 20

• lateral translation of mandible
• working side moves laterally
• non working side moves forward

Question 21

what is average Bennet’s angle?

Answer 21

8 degrees

Question 22

semi-adjustable

• types? (2)
• difference? (2)

Answer 22

arcon

• resembles TMJ
• fixed glenoid fossa, movable lower joint

non-arcon

• reverse TMJ
• vice versa.

Question 23

Difference between full and semi adjustable articular?

Answer 23

fully adjustable

- lateral condylar path inclinations are adjusted according to records taken from pt.

Question 24

what is the

• curve of spee (2)
• curve of wilson (2)

Answer 24

spee

• anatomical curvature of occlusal alignment of teeth.
• tip of incisors - buccal cusp of premolars/molars - anterior border of ramus

wilson
- across arch curvature or posterior occlusal plane

Question 25

what is the RPI system? (3)

Answer 25

• mesial rest
• distal proximal plate
• I bar

Question 26

name 2 denture design types (in terms of gingival appearance)

Answer 26

open faced

flanged