try in phase

Question 1

How is the occlusal balance maintained?

Answer 1

Via two compensation curves-
An antero-posterior curve
A lateral curve

Question 2

What is a balanced occlusion?

Answer 2

The first point of contact in centric relation
As many teeth as possible should be in contact evenly
Intercuspal positon=retruded contact position

Question 3

What is balanced articulation?

Answer 3

Desirable to have multiple contacts during movement

Stops dentures from tipping

Question 4

What are the two compensating curves?

Answer 4

Curve of Spee

Curve of Monson

Question 5

What is the Curve of Spee?

Answer 5

Antero-posterior compensating curve

Maintains mesio-distal contact when mandible is protruded

Question 6

What is the Curve of Monson?

Answer 6

Lateral compensating curve

As many contacts as possible during right and left excursive movements

Question 7

What do tooth characteristics involve?

Answer 7

Arrangement- degree of rotation, spacing, irregularities
Shade- overall, local
~age appropriate, lighter than normal etc.
Shape- overall, local
~oval, tapered and square

Question 8

How might tooth arrangement be considered?

Answer 8

Midline diastema?
Retroclined central incisors?
Subtle diastema between central and lateral incisors?

Question 9

How might gender relate to tooth shape?

Answer 9

Female- often oval
Male- often square
Both- tapered

Question 10

How much tooth should be visible?

Answer 10

Older patients have a more lax musculature so less gingival exposure
Difficult to reproduce young look
Should be according to facial expressions

Question 11

What shape should the upper incisors run?

Answer 11

They should curve and be parallel to the lower lip line

Question 12

What if there’s an error in vertical jaw relations?

Answer 12

If small-

Adjust on articulator pin, + or - occlusal vertical dimension (OVD)

Question 13

What if there’s an error in antero-posterior relationship?

Answer 13

Remove teeth and replace w wax before re-recording occlusal relationship

Question 14

How do you re-record the registration?

Answer 14

Hold lower jaw firmly
~index fingers buccal to lower 456 region and thumbs under chin
Manipulate into centric relation and slowly close

Question 15

How much of the lower teeth should be visible?

Answer 15

During speech and smiling should be able to see the tips

Question 16

How can you check for overextensions?

Answer 16

Cheek traction

~press gently on occlusal surface whilst pulling on cheek, if moves, it’s overextended

Question 17

What if there’s an error in the neutral zone?

Answer 17

Denture may be displaced

The lower anterior teeth need to be set ahead of the underlying ridge

Question 18

What if the tongue is cramped?

Answer 18

There may be lingually inclined molars so the tongue can displace the denture

Question 19

Where should the lower sevens be on the denture?

Answer 19

Should not be placed on the ascending ridge

If so, replace with retromolar pad acrylic

Question 20

How should buccal fat pads be considered?

Answer 20

Sevens may be removed to prevent trauma during function

Question 21

What is a post dam?

Answer 21

A raised ridge on the posterior border of the upper denture so there’s an air-tight seal anterior to the soft palate

Question 22

Why is a post dam needed?

Answer 22

During packing and flasking there is a degree of polymerisation shrinkage
This affects the posterior border fit

Question 23

Why is mapping the post dam key to retention?

Answer 23

Each patient is different
Compressibility is different in different areas
Bad post dam=bad seal

Question 24

How do you mark the post dam?

Answer 24

Patient say aaaahh
See where vibrating line is
Mark w indelible pencil
Palpate w ball or pear burnisher to see which tissues are compressible
Mark more than one if retching or poor tolerance
Acrylic between two dams as thin as possible

Question 25

How deep should the post dam be?

Answer 25

The more compressible the tissue, the deeper the dam