Adhesive

Question 1

Bond:

Answer 1

Adhesive interface:
Adherent (CR)
Adhesive
Adherend (E/D)

Question 2

Silane:

Answer 2

Etch porcelain
Monomer
1 end silicon, 1 end Carbon

Question 3

E Prismatic:

Answer 3

Under surface layer

Question 4

E Aprismatic:

Answer 4

surface layer, higher mineralised due to no prism boundaries.
More resistant to etch

Question 5

D Hybridisation

Answer 5

Intratubular vs intertubular

Question 6

Adhesive

Answer 6

2 hydrophobic ends = need primer to displace water in D

Question 7

Permeability in hybrid layer (permeable mbne)

Answer 7

not an issue of CR sealed to E

Question 8

G Bond

Answer 8

Etch, Primer and Adhesive

No HEMA adhesive, carboxyl group with Ca, no water absorption over time.

Question 9

Hydrodynamic theory

Answer 9

outward flow of dentinal fluid activates Adelta fibers = short, sharp pain.
(C fibers = dull, lingering pain)

Question 10

Hypersensitivity

Answer 10

Exposed dentinal tubules - no smear layer (erosion), recession

Question 11

Tmt for Hypersensitivity

Answer 11

Duraphat - CaF2 D tubules

Sensodyne - KNO3 block repolarisation AP (pain impulses)

Question 12

CR

Answer 12

Organic: monomers, BidGMA, UDMR, TEGMA, accelerator
Inorganic: Filler, glass, zirconia
Ba/SR=R/O

Question 13

GIC

Answer 13

Glass and acidic polymer
acid/base set
10-12mPa
Low Tensile Strength

Question 14

RMGIC

Answer 14

Added Resin (bond to CR)
15-20mPa
Low Tensile Strength

Question 15

Metal Primer

Answer 15

Double bond C=C CR

bifunctional resin

Question 16

Water trees

Answer 16

water channels (hydrophilic) in adhesive layer

Question 17

Smear Layer

Answer 17

Decreases tensile strength GIC and CR <5mPa

Question 18

Decrease Filler Size

Answer 18

Polymerisation shrinkage
Increase Shrinkage
(Increase filler size=decreases shrinkage)

Question 19

Hybrid Layer

Answer 19

Exposed Collagen (due to etch) and adhesive layer

Question 20

Sandblasting

Answer 20

Bond ceramic to tooth - luting cement

Question 21

1 Step Adhesive Advantages

Answer 21

Not technique sensitive
Less materials
Fast

Question 22

1 Step Adhesive Disadvantages

Answer 22

Small resin tags
Smear Layer may not all be gone
Smaller Hybrid layer

Question 23

FRC

Answer 23

Better wear resistance

Question 24

Survival Rates

Answer 24

GIC 1-3yrs
CR 7-10yrs
Amalgam 15+yrs

Question 25

Flexural Strength

Answer 25

Tensile and compressive strength

Question 26

Good Material | Clinical situation/Costs

Answer 26

- Composition - Polymerisation Shrinkage - Compressive Strength - Tensile strength - Flexural Strength - Fracture toughness - Wear resistance - Polish retention - Surface roughness

Question 27

Causes of Failure:

Answer 27

- High Caries Risk, Fractures, Reoccurant caries - Technique (Direct bond/Sandwhich) - Pt Factors (caries,OH,SHX) - Operator (conditions/moisture control)