Lec 2 Classifications of Composites

Question 1

4 classifications based on filler particle size.

Answer 1

1. Macrofill/Conventional
2. Microfill
3. Hybrid
4. Nanofill

Question 2

Average particle size is 8um.

Answer 2

Macrofill

Question 3

Rough surface structure strontium and barium glass (radiopaque).

Answer 3

Macrofill

Question 4

Contains 70-85% inorganic fillers.

Answer 4

Macrofill

Question 5

Contains 35-60% inorganic fillers.

Answer 5

Microfill

Question 6

Contains 75-85% inorganic fillers.

Answer 6

Hybrid

Question 7

Not very polishable and is prone to staining.

Answer 7

Macrofill

Question 8

Polishable and has smooth lustrous surface similar to tooth enamel.

Answer 8

Microfill

Question 9

Particle size = 0.01-0.04um

Answer 9

Microfill

Question 10

Particle size = 0.005-0.01um

Answer 10

Nanofill

Question 11

Particle size = 0.4 - 1um.

Answer 11

Hybrid

Question 12

Nanoparticulates are referred to as ______; while macroscopic sample materials are referred to as ______.

Answer 12

Fillers; Matrix

Question 13

Its physical properties are superior.

Answer 13

Hybrid

Question 14

The predominant direct esthetic resin and have universal clinical applicability.

Answer 14

Hybrid

Question 15

Combines properties of conventional and microfill.

Answer 15

Hybrid

Question 16

Wear resistant and has lower modulus elasticity, allowing the restoration to flex.

Answer 16

Microfill

Question 17

Has higher resin content, resulting in increased coefficient of thermal expansion and lower strength.

Answer 17

Microfill

Question 18

2 classifications based on viscosity.

Answer 18

1. Packable
2. Flowable

Question 19

More viscous; thicker, stiffer feel.

Answer 19

Packable

Question 20

Used for small Class I cavities, pit and fissure sealants, marginal repairs, and liners.

Answer 20

Flowable

Question 21

Has a feature that prevents sliding of filler particle by one another.

Answer 21

Packable

Question 22

Easier for proximal contact restorations; similar to handling of amalgam.

Answer 22

Packable

Question 23

Has lower viscosity and lower filler content.

Answer 23

Flowable

Question 24

Has inferior physical properties (lower wear resistance & strength)

Answer 24

Flowable

Question 25

Easy to use, good wettability, and favourable handling properties.

Answer 25

Flowable