Adhesive Bridge I

Question 1

Adv of adhesive bridges?

Answer 1

Seen conservative option replace teeth
Less destructive than conservative bridges
Viable for sound/ lightly restored dentition

Question 2

What is Rochette bridge?

Answer 2

No true adhesive bridge - perforation in wings allowing cement extrude = mechanical retention

Question 3

Types of retention of bridges?

Answer 3

Full coverage

Adhesive retainers

Question 4

How are full coverage bridge provided?

Answer 4

Prep of abutment tooth for full coverage crown

Question 5

How are adhesive bridges provided?

Answer 5

Minimal prep of abutment tooth involving only palatal and proximal surface

Question 6

What are different types of abutment arrangements?

Answer 6

Fixed-fixed

Cantilevered

Question 7

What is a fixed-fixed bridge?

Answer 7

Bridge has two abutment with pontic between

Pontic fixed either side

Question 8

What is a cantilever bridge?

Answer 8

Bridge retained by one abutment

Question 9

Tx options for missing teeth?

Answer 9

Do nothing
Removable - RPD
Fixed - bridge
Implant

Question 10

10 parts of design criteria for adhesive bridge?

Answer 10

1. Periodontal support
2. Occlusal loading
3. Conservation tooth tissue
4. Cleansible
5. Appearance
6. Rigidity
7. Quality of abutment tooth
8. No of abutments
9. Choice cement
10. Contingency planning

Question 11

What assess when assessing the quality of the abutment tooth?

Answer 11

Vitality of tooth
Restoration status of tooth
Any rotations
Oral hygiene

Question 12

Main reason need to contingency plan?

Answer 12

Loss of vitality of abutment tooth

Question 13

Ideal design of adhesive bridge?

Answer 13

Used for single tooth replacement

Cantilevered

Question 14

Adv of cantilever bridges?

Answer 14

Pontic moves with abutment - reduces shear forces

Reduced caries risk

Question 15

How prep tooth for cantilevered RBB?

Answer 15

Mesial and distal grooves
Light palatal chamfer
Cingulum rest

Question 16

How thick does retainer need to be on a mnolar?

Answer 16

0.8mm thick - increased thickness if over occlusal surface

Question 17

Why need correct thickness for retainer?

Answer 17

Rigidity - prevent flexion = peeling effect = debond

Question 18

Ideal bonding area?

Answer 18

Maximise enamel bonding

Occluso-gingival and circumferential around tooth

Question 19

Issue w/ increasing bonding area of framework?

Answer 19

Aesthetic and perio implication

Maximise SA w/o encroach gingival tissue and aestehtic zone

Question 20

Two approachs to tooth prep and extension frameowrk?

Answer 20

1. Full palatal coverage w/ no prep

2. Reduced palatal coverage w/ tooth prep

Question 21

Why provide occlusal coverage on posterior teeth?

Answer 21

Resist displacement
Increase rigidity
Greater SA bonding

Question 22

What is the connector?

Answer 22

Junction between pontic and retainer

Question 23

Why need sufficient thickness of connector?

Answer 23

Prevent flexion = peeling = debond

Question 24

Is height of connector important?

Answer 24

Yes needs to be at least 50% height of pontic

Question 25

Why are grooves used in adhesive bridge prep?

Answer 25

Resistance lateral displacement | Increased retention

Question 26

What want grooves on tooth to be?

Answer 26

Parallel - increase resistance and retention

Question 27

Why are occlusal seat rests used?

Answer 27

Allow transmission of occlusal force along long axis of tooth

Question 28

What is joining the occlusal rests called?

Answer 28

Occlusal bar

Question 29

Advantage of preparing an occlusal bar?

Answer 29

Improve rigidity of retainer

Question 30

What cements can be used for adhesive bridges?

Answer 30

Self cure composite lute Anaerobic adhesive lutes 4-meta ahdesive lutes

Question 31

Example of self-cure compoiste lute?

Answer 31

Calibra

Question 32

What need with self-cure composite lute?

Answer 32

Non-adhesive Needs used in combination w/ bonding system Require etched metal substrate

Question 33

Example of anaerobic adhesive lute?

Answer 33

Panavia

Question 34

What need to use with Panavia?

Answer 34

Oxygaurd - ensure bonding takes place anaerobically

Question 35

When a 4-meta adhesive lutes used?

Answer 35

Want speicifc bonding to metal and ceramic retainers

Question 36

What materials are used for retainer?

Answer 36

Nickle chromium Gold alloy Ceramics

Question 37

How choose abutment tooth?

Answer 37

Tooth position - angulation agreeable POI? Crown shape - increased SA Restorative status Endodontic status

Question 38

What teeth provide poor abutment teeth?

Answer 38

Maxillary lateral incisor - small w/ little SA to bond + small roots Tilted teeth RF teeth

Question 39

Estimated survival of RBB?

Answer 39

87.7% at 5 years

Question 40

Reason for failure RBB?

Answer 40

Debonding Caries under retainer Aesthetic failure

Question 41

What should not do when designing bridge?

Answer 41

Use of double abutment - not required and difficult to clean

Question 42

When could fixed-fixed adhesive bridge be used?

Answer 42

Mandibular incsiors

Question 43

Design consideration of adhesive bridge?

Answer 43

``` Retainer thickness Bonding area Wrap-around Occlusal extension Connector design Length of span ```