Bridges

Question 1

In a fixed movable bridge which abutment is the female abutment

Answer 1

Anterior

Question 2

In a fixed movable bridge which abutment is the male attachment

Answer 2

Distal /posterior

Question 3

What are the advantages of a fixed movable bridge

Answer 3

The joint is a stress breaker
Because it is not a fixed fixed less prep is required especially female (can use 3/4crown)
Process of cementation is easier

Question 4

What are the advantages of using porcelain for an inlay/onlay (2)

Answer 4

• Stronger than composite
• Porcelain to composite luting cement bond is better than composite to composite

Question 5

What is used to cement onlays and Inlays

Answer 5

Composite luting cement

Question 6

What are the advantages of composite inlay/onlay (7)

Answer 6

• Composite more forgiving
• Has better flexural strength
• Does not need hollow ground chamfer
• Only required 1mm prep rather than 2mm
• Has more of a chameleon effect with the surrounding tooth
  -Cheaper
• Can be repaired

Question 7

What is the occlusal reduction in a fixed movable

Answer 7

1.5mm

Question 8

What is Antes law

Answer 8

The total periodontal membrane area of the abutment teeth must equal or exceed that of the teeth to be replaced

Question 9

How can you increase the retention of a bridge

Answer 9

Ensure good crown height and width
Not too over tapered
Grooves
Boxes
Slots

Question 10

Where can grooves be placed
For a single crown

Answer 10

Mesial and distal

Question 11

Where would retention grooves be placed in a bridge

Answer 11

Buccal lingual grooves
On the distal abutment- most stress