Part 1

Question 1

Fluoride containing adhesives.

Answer 1

Cannot guarantee a recommendation.

Question 2

Compare between flowable adhesive & conventional adhesive.

Answer 2

Bond strength increases wit increased filler percentage.

Failure of flowable = 30-40% of. Conventional.

Shear bond strength= 50% of conventional.

Question 3

Why curing depth is of great importance.?

Answer 3

1. Leaching of estrogen from free monomer biphenol
2. Curing affects bond strength

Question 4

What are the components of glass monomer

Answer 4

Powder

Silica

Alumina

NaF

AlF

Aluminum phosphate

Barium
Strontium

Liquid

Poly acrylic acid.
Itaconic acid _ malic acid - tricarbaryllic acid ( ↓ viscosity )
Tartaric acid → î working time
Water.

Question 5

What are types of glass ionomer ?

Answer 5

1. Luting 2.
2. Restorative cement
3. Liner

4.Fissure sealent

5. Ortho cement
6. Core build up.

8 and 9 Packable GIC for a traumatic restoration.

Question 6

Advantages of GIC

Answer 6

Absorbs F from saliva & re-releases it

Possibility of eliminating etching

Possibility to bond in wet environment.

Î working time

Easy de bonding

Question 7

Concerns with GIC

Answer 7

① lower bonding strength than composite.

② GIC reaches full strength in 24 hours. → strength î 15-20 X

③ unpleasant taste due to acids presence

Question 8

What type of GIC requires etching?

Answer 8

RMGI ( light cured)

Question 9

What is the setting reaction of conventional glass ionomer?.

Answer 9

Powder & liquid set in acid-base reaction

Question 10

Compare between bonding strengths of conventional resin & RMGI

Answer 10

Bond strength of conventional resin = 18.5 map after 24 hours.

RMGI bond strength = 9.6 mpa

Question 11

Difference between conventional & RMGI

Answer 11

RMGI contains resin, component called HEMA = hydroxyl ethyl methacrylate.

Can be activated chemically / light.

It contains 10% resin (hema).

Question 12

Advantages of RMGI over conventional GI

Answer 12

① chemical bending in enamel..
② higher strength
③ More esthetic.
④ failure at bracket adhesive interphase = ↓ enamel fix in de-bonding.

Question 13

Other names of compomers

Answer 13

Modified composite or poly acid modified resin composites.

Question 14

Difference between compomers & RMG I

Answer 14

Composer contains fillers 30: 50 %, while RMGI contains 10%

Question 15

Advantages of composer

Answer 15

1 More aesthetic.

② higher bond strength

3 high fracture toughness

④ ↓ solubility.

Question 16

Disadvantages of compOmer.

Answer 16

① requires bonding agent → due to î fillers.

② ↓ fluoride release.

Question 17

Failure rate of cyanoacrylates ( El saroo5 )

Answer 17

Failure = 22 %,→ in split mouth study→ conventional adhesive = 5.1%