irs-t bridges

Question 1

Fixed-fixed

Answer 1

Full coverage retainer on an abutment at each side of the Pontic

Parallel preps essential- only one path of insertion

Question 2

Cantilever

Answer 2

One/two abutments on on side of abutment

Question 3

Semi fixed

Answer 3

Retainers either side of the abutments but joint between Pontic and retainer

Individual path of insertion for each retainer
Cemented independently

Good for malaligned teeth
Difficult to produce

Question 4

Spring cantilever

Answer 4

Pontic distant to abutment teeth linked by bar
Not used often due to resin bonded bridges

Question 5

Resin bonded bridges

Answer 5

Minimal prep

Question 6

Types of bonds

Answer 6

Macro mechanical- Rochette

Medium mechanical- Salt etch

Micro mechanical- Maryland (HF etch)

Question 7

Post crown

Answer 7

Direct core build up over preformed post

Indirect para post or custom made

Question 8

Para post

Answer 8

Same diameter-
- remer
- impression post (plastic)
- temp post
- fabrication post (plastic and smooth)