Dental Materials MCQs

Is A – Hamihydrate

Has Porous And Irregular Crystals

Has A W / P Of 0.2

Is Wet Calcined Hemihydrate

Rubber Bowl

Metal Bowl

Plastic Bowl

Glass Bowl

Citrates Are Retarders

All Of The Above

2% Potassium Sulphate Is Accelerator

Rapid Spatulation Results In Decreased Setting Time

H2o Interferes With Crystallization Of Dihydrate

H2o Inhibits Polymerization Of Dental Resin

H2o Interferes With Hygroscopic Expansion

Gypsum Is Slightly Soluble In Water And The Surface Of The Cast Will Be Eroded

Using Contaminated Gold Foil

Using Small Condenser Point

Improper Stepping Of Condenser Point

Poor Finished Preparation

Removes Surface Oxides From Gold Castings

Remove Investment From Gold Casting

Causes Porosity In Gold

Is Accomplished By Soaking The Casting In Baking Soda

Translucency

Refractive Optics

Opacification

Metamerism

Resin Cement

Silicate Cement

Zinc Phosphate

Glass Ionomer Cement

5

8

7

1.7

7-Jun

8-Jul

4-Mar

5-Apr

Agar-Agar

Alginate

Zinc Oxide-Eugenol

Impression Compound

70%

60%

90%

80%

30-35%

26-28%

13-32%

22-30%

0%

>40%

25%

N 25%

Cr, Fe, Ti

Cr, Mo, Ti

Cr, Al, Ti

Cr, Gold, Ti

Helps As Surfactant

Act As A Scavenger

Acts As A Catalyst

Acts As Plasticizer

Impression Paste

Silicone

Impression Plaster

Agar-Agar

Gives Al Dull And Crumbly Amalgam

Reduces Contraction

Increases The Strength Of Lathe Cut Alloy But Reduces The Strength Of Spherical Alloy Amalgam

Decreases Creep

Tensile Strength

Compressive Strength

Corrosion

Creep

Contains Opacifier Like Zirconium And Titanium Oxide

Not Used To Mask The Colour Of The Cement Used In Placing Of Restoration

Is Feldspathic Glass

Used To Produce The Characteristic Translucence, Which Is An Inherent Aspect Of The Incisal Edge In Natural Teeth

Close Adaptation To Soft Tissues

Reproduction Of Surface Details

With Drawl Without Permanent Distortion

Compatibility With Gypsum Products

Are Practically Insoluble In Oral Fluids

Have A Higher Coefficient Of Thermal Expansion

Prevent Galvanic Action

Adapt To The Walls Of The Cavity Better

Separate Etching Step Not Required

Contains Only Primer

Separate Etching Step Is Still Required

4Th Generation Bonding Agents

5 Minutes

6 Minutes

3 Minutes

15 Minutes

Graphite

Acrylic

Porcelain

Carbon