Dental Materials: Properties, Applications, and Exam Preparation

Question 1

In dentistry, which property determines a material's resistance to deformation under load?

Accepted Answer

Strength

Answer

Biocompatibility

Answer

Esthetics

Answer

Radiopacity

Question 2

Which of the following materials is a type of ceramic commonly utilized in dentistry?

Accepted Answer

Glass-ionomer cement

Answer

Stainless steel

Answer

Polyethylene

Answer

Titanium

Question 3

True or False: The chemical composition of dental materials can influence their biological interactions in the oral environment.

Accepted Answer

True

Answer

False

Question 4

Which of the following is NOT classified as a dental material?

Accepted Answer

Bone grafts

Answer

Metals

Answer

Ceramics

Answer

Polymers

Question 5

Which metal is the primary component of dental amalgam fillings?

Accepted Answer

Mercury

Answer

Gold

Answer

Silver

Answer

Platinum

Question 6

Which type of ceramic offers both high strength and translucency, making it suitable for dental restorations?

Accepted Answer

Zirconia

Answer

Feldspathic porcelain

Answer

Alumina

Answer

Glass-ionomer cement

Question 7

In dental material selection, which ethical principle is paramount?

Accepted Answer

Ensuring patient safety

Answer

Minimizing environmental impact

Answer

Optimizing cost-effectiveness

Answer

Considering manufacturer reputation

Question 8

Which of the following properties is characteristic of metals used in dentistry?

Accepted Answer

High strength and ductility

Answer

Low thermal conductivity

Answer

Ease of manipulation

Answer

Corrosion resistance

Question 9

Which type of ceramic is commonly utilized in the fabrication of dental crowns and bridges due to its strength and aesthetics?

Accepted Answer

Zirconia ceramic

Answer

Glass ceramic

Answer

Feldspathic ceramic

Answer

Alumina ceramic

Question 10

Which element plays a crucial role in enhancing the corrosion resistance of stainless steel employed in dentistry?

Accepted Answer

Chromium

Answer

Nickel

Answer

Iron

Answer

Carbon

Question 11

Which type of dental implant is primarily fabricated from titanium due to its excellent biocompatibility and mechanical properties?

Accepted Answer

Endosteal implants, which are surgically placed within the jawbone

Answer

Subperiosteal implants, which are placed on top of the jawbone

Answer

Transosseous implants, which pass through the jawbone

Answer

Intraosseous implants, which are inserted into the jawbone

Question 12

Which metal is commonly used in dental implants?

Accepted Answer

Titanium

Answer

Copper

Answer

Silver

Answer

Aluminium

Question 13

What is the primary component of glass-ionomer cement?

Accepted Answer

Silica and alumina

Answer

Calcium and phosphate

Answer

Zirconia and yttria

Answer

Lithium and disilicate

Question 14

Which of the following polymers is commonly used in the fabrication of removable dentures?

Accepted Answer

Polymethyl methacrylate

Answer

Polyethylene

Answer

Polyvinyl chloride

Answer

Polytetrafluoroethylene

Question 15

What is the function of bonding agents in dentistry?

Accepted Answer

To increase the strength of the adhesive interface

Answer

To improve the aesthetics of the restoration

Answer

To reduce the risk of caries

Answer

To enhance the durability of the material

Question 16

What is the main purpose of a cavity liner in dentistry?

Accepted Answer

To protect the pulp from thermal and chemical irritation

Answer

To enhance the bond strength between the restoration and the tooth

Answer

To reduce the risk of secondary caries

Answer

To improve the aesthetics of the restoration

Question 17

Which property is NOT typically associated with metals used in dentistry?

Accepted Answer

Low biocompatibility

Answer

High strength

Answer

Excellent corrosion resistance

Answer

Ease of manipulation

Question 18

The primary component of dental porcelain is:

Accepted Answer

Feldspathic material

Answer

Silica

Answer

Alumina

Answer

Zirconia

Question 19

Which material is commonly used in dental implants due to its biocompatibility?

Accepted Answer

Titanium

Answer

Stainless Steel

Answer

Gold

Answer

Cobalt-chromium

Question 20

The primary purpose of a dental amalgam is to:

Accepted Answer

Restore lost tooth structure

Answer

Repair fractured teeth

Answer

Provide insulation under crowns

Answer

Strengthen weakened teeth

Question 21

Which of the following classifications of dental materials is based on their clinical use?

Accepted Answer

Restorative materials

Answer

Polymers

Answer

Metals

Answer

Biomaterials

Question 22

The main component of glass ionomer cements that provides their acidic functionality:

Accepted Answer

Polyacrylic acid

Answer

2-hydroxyethyl methacrylate

Answer

Bisphenol A

Answer

Triethylene glycol dimethacrylate

Question 23

Which property is characteristic of dental ceramics, contributing to their durability?

Accepted Answer

High toughness

Answer

Low strength

Answer

Brittleness

Answer

Poor wear resistance

Question 24

The primary bonding mechanism between composite resins and tooth structure is achieved through:

Accepted Answer

Micromechanical interlocking

Answer

Ionic bonding

Answer

Van der Waals forces

Answer

Hydrogen bonding

Question 25

The primary metal constituent of dental amalgams is:

Accepted Answer

Silver

Answer

Gold

Answer

Palladium

Answer

Copper

Question 26

The setting reaction of glass ionomer cements primarily involves:

Accepted Answer

An acid-base reaction

Answer

A radical polymerization reaction

Answer

A condensation reaction

Question 27

The main advantage of using composite resins in dental restorations is their ability to:

Accepted Answer

Bond to tooth structure

Answer

Provide long-lasting restorations

Answer

Withstand heavy forces

Answer

Resist high temperatures

Question 28

The primary purpose of using a rubber dam during dental procedures involving dental materials is to:

Accepted Answer

Isolate the treatment area and prevent contamination

Answer

Protect the patient from harmful substances

Answer

Improve visibility of the treatment area