Clinical Aspects of Dental Materials
Fifth Edition
, CHAPTER LIST
Part I: Theoretical Perspectives
Chapter 1: Introduction
Chapter 2: Materials Science and Dentistry
Chapter 3: Physical and Mechanical Properties of Dental Materials
Chapter 4: Adhesive Materials
Chapter 5: Direct Polymeric Restorative Materials
Chapter 6: Amalgam
Chapter 7: Dental Cements
Chapter 8: Impression Materials
Chapter 9: Gypsum Materials
Chapter 10: Materials for Fixed Indirect Restorations and Prostheses
Chapter 11: Removable Prostheses and Acrylic Resins
Chapter 12: Dental Implants
Chapter 13: Specialty Materials
Chapter 14: Clinical Detection and Management of Dental Restorative Materials during Scaling and
Polishing
Chapter 15: Radiographic Appearance of Dental Tissues and Materials
Chapter 16: Polishing Materials and Abrasion
Chapter 17: Tooth Whitening
Chapter 18: Oral Appliances
Chapter 19: Instruments as Dental Materials-Care and Maintenance
Chapter 20: Infection Control and Safety in the Dental Office
Chapter 21: Disinfection of Impressions, Dentures, and Other Appliances and Materials
Chapter 22: General Rules for Handling Dental Materials
Part II: Laboratory and Clinical Applications
Chapter 23: Mixing Liners, Bases, and Cements
Chapter 24: Application and Removal of the Rubber Dam
Chapter 25: Pit and Fissure Sealants
Chapter 26: Amalgam Placement, Carving, Finishing, and Polishing
Chapter 27: Taking Alginate Impressions
Chapter 28: Fabrication and Trimming of Study Models
Chapter 29: Fabrication of a Custom Impression Tray
Chapter 30: Elastomeric Impressions
Chapter 31: Vital Tooth Whitening Procedures
Chapter 32: Debonding Orthodontic Resins
Chapter 33: Placement of the Periodontal Dressing
Chapter 34: Removal of the Periodontal Dressing and Sutures
Chapter 35: Temporary Crowns
Chapter 36: Composite Finishing and Polishing
Chapter 37: Tips for the New Hygienist
,Complete 37-Chapter Test Bank (25 Questions per Chapter | 925 Questions Total)
Answer Key + Rationale available
Chapter 1: Introduction
Questions
Question 1**
Why does the Food and Drug Administration (FDA) classify dental restorative materials like amalgam and
composite resins as Class II medical devices rather than Class I?
A. Class II devices are classified based solely on their setting speed in the oral cavity.
B. Class II devices require performance standards and special controls to ensure safety and clinical
effectiveness.
C. Class II devices are life-sustaining implantable devices requiring premarket approval (PMA).
D. Class II devices are low-risk items that require only general manufacturing controls.
Question 2**
Which organization administers a voluntary evaluation program that awards a recognized Seal of Acceptance
to consumer oral health products?
A. Food and Drug Administration (FDA)
B. American Dental Association (ADA)
C. National Institute of Occupational Safety and Health (NIOSH)
D. International Organization for Standardization (ISO)
Question 3**
,What happens to the tooth-restoration interface when a restorative material expands and contracts at a rate
significantly higher than adjacent natural enamel?
A. Galvanic currents are eliminated within the oral cavity.
B. Microleakage and percolation occur, increasing the risk of recurrent caries.
C. The marginal seal tightens due to increased interfacial friction.
D. Chemical adhesion to dentinal tubules is permanently enhanced.
Question 4**
Which restoration classification applies when a clinician places, condenses, and shapes composite resin
directly into a prepared cavity during a single patient visit?
A. Indirect restoration
B. Auxiliary restoration
C. Direct restoration
D. Laboratory-fabricated restoration
Question 5**
Why are temporary (provisional) restorations routinely placed on teeth prepared for full-coverage ceramic
crowns?
A. To protect prepared tooth structure, maintain tooth position, and provide temporary esthetics while the final
crown is fabricated.
B. To etch dentin tubules prior to final resin cementation.
C. To permanently seal the pulp chamber against bacterial infiltration.
D. To permanently alter the natural hue and value of adjacent abutment teeth.
Question 6**
Which G.V. Black cavity classification encompasses carious lesions located on the gingival third of the facial or
lingual surfaces of anterior or posterior teeth?
A. Class V
B. Class II
,C. Class IV
D. Class III
Question 7**
What primary function distinguishes preventive dental materials from therapeutic dental materials?
A. Preventive materials require Class III FDA approval, whereas therapeutic materials require Class I FDA
approval.
B. Preventive materials rely on metallic bonding, whereas therapeutic materials rely on ionic bonding.
C. Preventive materials inhibit the initiation of disease, whereas therapeutic materials treat existing disease or
pulpal inflammation.
D. Preventive materials are placed indirectly, whereas therapeutic materials are placed directly.
Question 8**
Which dental restorative material category is constructed outside the oral cavity on a cast replica of the
patient's teeth prior to final cementation?
A. Direct dental amalgam
B. Glass ionomer liner
C. Direct resin composite
D. Indirect restoration
Question 9**
Why is high compressive strength essential for materials placed in posterior Class I cavity preparations?
A. Posterior teeth experience minimal masticatory force during chewing.
B. Compressive strength directly determines the optical translucency of the material.
C. High compressive strength prevents the material from dissolving in salivary enzymes.
D. Masticatory forces in the molar region exert heavy vertical crushing loads on restorations.
Question 10**
Which international entity establishes consensus standards for dental biomaterials to promote global trade and
product quality?
,A. Centers for Disease Control and Prevention (CDC)
B. American National Standards Institute (ANSI)
C. Occupational Safety and Health Administration (OSHA)
D. International Organization for Standardization (ISO)
Question 11**
Which situation describes a Class III cavity preparation according to G.V. Black's classification system?
A. Caries on the proximal surface of an incisor that does not involve the incisal angle.
B. Caries on the occlusal pits and fissures of a premolar or molar.
C. Caries on the proximal surface of a posterior molar.
D. Caries on the proximal surface of an incisor that involves the incisal angle.
Question 12**
Which type of dental restoration is expected to serve functionally in the oral cavity for several weeks to a few
months while tissue heals or diagnosis is confirmed?
A. Cast restoration
B. Abutment restoration
C. Interim restoration
D. Permanent restoration
Question 13**
Why is biocompatibility testing essential before a new dental biomaterial receives regulatory clearance for
clinical use?
A. To guarantee that the material has an infinite shelf life in the dental office.
B. To verify that the material does not cause toxic, inflammatory, allergic, or carcinogenic reactions in oral
tissues.
C. To ensure the material will match the optical shade of natural teeth under fluorescent lighting.
D. To prevent galvanic corrosion between dissimilar orthodontic appliances.
Question 14**
,Which G.V. Black cavity classification refers specifically to carious lesions or structural defects on the incisal
edges of anterior teeth or cusp tips of posterior teeth?
A. Class VI
B. Class IV
C. Class III
D. Class V
Question 15**
The regulatory agency in the United States that oversees the safety, medical device classification, and
marketing clearance of dental materials is the _______.
Question 16**
The microscopic space existing between the wall of the cavity preparation and the restorative material, through
which fluids, oral bacteria, and ions can penetrate, is termed _______.
Question 17**
According to G.V. Black's cavity classification, a cavity preparation located on the proximal surface of a molar
or premolar is classified as Class _______.
**Extended Matching Questions (EMQ Set - Chapter 1)**
**Theme:** Standards Organizations, Material Classifications, and Cavity Preparation Types
Option Description / Term
A Class I Medical Device
B Class III Medical Device
C Direct Restorative Material
D Indirect Restorative Material
,E Class IV Cavity Preparation
F Preventive Dental Material
Question 18**
A restorative material placed, condensed, and shaped directly into the prepared tooth cavity during a single
clinical appointment.
Question 19**
Dental device category subject to the most stringent regulation, requiring premarket approval (PMA) due to
high potential risk (e.g., endosseous dental implants).
Question 20**
Cavity preparation involving the proximal surface of an anterior tooth that includes the incisal angle.
Question 21**
Material designed to prevent the onset of dental disease, such as a pit and fissure sealant or topical fluoride
gel.
Question 22**
Device category deemed lowest in risk, subject primarily to general manufacturing controls (e.g., dental
examination mirrors and prophy cups).
Question 23**
Restoration fabricated outside the patient's mouth on a master cast before clinical placement and cementation.
Question 24**
Clinical Vignette: A 34-year-old male presents with acute sensitivity to cold liquids on tooth #9. Clinical
evaluation reveals a defect on the mesial surface extending onto the incisal corner caused by a sports injury.
Radiographs demonstrate intact periapical tissues and no pulpal exposure. The clinician prepares the tooth
and places a light-cured resin composite restoration directly during the visit.
Which cavity preparation classification and restoration category are represented in this clinical scenario?
A. Class IV cavity preparation with a direct restoration
, B. Class VI cavity preparation with a direct restoration
C. Class V cavity preparation with an interim restoration
D. Class III cavity preparation with an indirect restoration
Question 25**
Clinical Vignette: A 58-year-old female patient presents for a hygiene examination. The clinician notes a dark
shadow along the gingival margin of a 15-year-old Class I amalgam restoration on tooth #19. Air application
elicits transient discomfort. Exploration reveals breakdown of the marginal seal with bacterial filtration along the
restoration margins.
Which clinical phenomenon is primarily responsible for the marginal breakdown and recurrent caries observed
in this patient?
A. Excessive galvanic stimulation from gold crowns
B. High tensile stress generated during mastication
C. Chronic microleakage leading to bacterial percolation
D. Chemical dissolution of the amalgam in saliva
Answer Key & Rationales - Chapter 1
Question 1:** Answer: B
Rationale: Class II medical devices (such as dental amalgam, resin composite, and dental cements) are
moderate-risk devices that require special controls, including performance standards, FDA clearance (510k),
and post-market surveillance to ensure safety and effectiveness.
Question 2:** Answer: B
Rationale: The American Dental Association (ADA) Council on Scientific Affairs administers the Seal of
Acceptance program, evaluating consumer products (such as toothpastes and mouthrinses) for safety and
clinical efficacy claims.
Question 3:** Answer: B
Rationale: A significant mismatch in the coefficient of thermal expansion (CTE) between tooth structure and
restoration causes differential expansion and contraction during temperature changes. This creates
microleakage and percolation, drawing oral fluids and bacteria into the margin and increasing recurrent caries
risk.
Fifth Edition
, CHAPTER LIST
Part I: Theoretical Perspectives
Chapter 1: Introduction
Chapter 2: Materials Science and Dentistry
Chapter 3: Physical and Mechanical Properties of Dental Materials
Chapter 4: Adhesive Materials
Chapter 5: Direct Polymeric Restorative Materials
Chapter 6: Amalgam
Chapter 7: Dental Cements
Chapter 8: Impression Materials
Chapter 9: Gypsum Materials
Chapter 10: Materials for Fixed Indirect Restorations and Prostheses
Chapter 11: Removable Prostheses and Acrylic Resins
Chapter 12: Dental Implants
Chapter 13: Specialty Materials
Chapter 14: Clinical Detection and Management of Dental Restorative Materials during Scaling and
Polishing
Chapter 15: Radiographic Appearance of Dental Tissues and Materials
Chapter 16: Polishing Materials and Abrasion
Chapter 17: Tooth Whitening
Chapter 18: Oral Appliances
Chapter 19: Instruments as Dental Materials-Care and Maintenance
Chapter 20: Infection Control and Safety in the Dental Office
Chapter 21: Disinfection of Impressions, Dentures, and Other Appliances and Materials
Chapter 22: General Rules for Handling Dental Materials
Part II: Laboratory and Clinical Applications
Chapter 23: Mixing Liners, Bases, and Cements
Chapter 24: Application and Removal of the Rubber Dam
Chapter 25: Pit and Fissure Sealants
Chapter 26: Amalgam Placement, Carving, Finishing, and Polishing
Chapter 27: Taking Alginate Impressions
Chapter 28: Fabrication and Trimming of Study Models
Chapter 29: Fabrication of a Custom Impression Tray
Chapter 30: Elastomeric Impressions
Chapter 31: Vital Tooth Whitening Procedures
Chapter 32: Debonding Orthodontic Resins
Chapter 33: Placement of the Periodontal Dressing
Chapter 34: Removal of the Periodontal Dressing and Sutures
Chapter 35: Temporary Crowns
Chapter 36: Composite Finishing and Polishing
Chapter 37: Tips for the New Hygienist
,Complete 37-Chapter Test Bank (25 Questions per Chapter | 925 Questions Total)
Answer Key + Rationale available
Chapter 1: Introduction
Questions
Question 1**
Why does the Food and Drug Administration (FDA) classify dental restorative materials like amalgam and
composite resins as Class II medical devices rather than Class I?
A. Class II devices are classified based solely on their setting speed in the oral cavity.
B. Class II devices require performance standards and special controls to ensure safety and clinical
effectiveness.
C. Class II devices are life-sustaining implantable devices requiring premarket approval (PMA).
D. Class II devices are low-risk items that require only general manufacturing controls.
Question 2**
Which organization administers a voluntary evaluation program that awards a recognized Seal of Acceptance
to consumer oral health products?
A. Food and Drug Administration (FDA)
B. American Dental Association (ADA)
C. National Institute of Occupational Safety and Health (NIOSH)
D. International Organization for Standardization (ISO)
Question 3**
,What happens to the tooth-restoration interface when a restorative material expands and contracts at a rate
significantly higher than adjacent natural enamel?
A. Galvanic currents are eliminated within the oral cavity.
B. Microleakage and percolation occur, increasing the risk of recurrent caries.
C. The marginal seal tightens due to increased interfacial friction.
D. Chemical adhesion to dentinal tubules is permanently enhanced.
Question 4**
Which restoration classification applies when a clinician places, condenses, and shapes composite resin
directly into a prepared cavity during a single patient visit?
A. Indirect restoration
B. Auxiliary restoration
C. Direct restoration
D. Laboratory-fabricated restoration
Question 5**
Why are temporary (provisional) restorations routinely placed on teeth prepared for full-coverage ceramic
crowns?
A. To protect prepared tooth structure, maintain tooth position, and provide temporary esthetics while the final
crown is fabricated.
B. To etch dentin tubules prior to final resin cementation.
C. To permanently seal the pulp chamber against bacterial infiltration.
D. To permanently alter the natural hue and value of adjacent abutment teeth.
Question 6**
Which G.V. Black cavity classification encompasses carious lesions located on the gingival third of the facial or
lingual surfaces of anterior or posterior teeth?
A. Class V
B. Class II
,C. Class IV
D. Class III
Question 7**
What primary function distinguishes preventive dental materials from therapeutic dental materials?
A. Preventive materials require Class III FDA approval, whereas therapeutic materials require Class I FDA
approval.
B. Preventive materials rely on metallic bonding, whereas therapeutic materials rely on ionic bonding.
C. Preventive materials inhibit the initiation of disease, whereas therapeutic materials treat existing disease or
pulpal inflammation.
D. Preventive materials are placed indirectly, whereas therapeutic materials are placed directly.
Question 8**
Which dental restorative material category is constructed outside the oral cavity on a cast replica of the
patient's teeth prior to final cementation?
A. Direct dental amalgam
B. Glass ionomer liner
C. Direct resin composite
D. Indirect restoration
Question 9**
Why is high compressive strength essential for materials placed in posterior Class I cavity preparations?
A. Posterior teeth experience minimal masticatory force during chewing.
B. Compressive strength directly determines the optical translucency of the material.
C. High compressive strength prevents the material from dissolving in salivary enzymes.
D. Masticatory forces in the molar region exert heavy vertical crushing loads on restorations.
Question 10**
Which international entity establishes consensus standards for dental biomaterials to promote global trade and
product quality?
,A. Centers for Disease Control and Prevention (CDC)
B. American National Standards Institute (ANSI)
C. Occupational Safety and Health Administration (OSHA)
D. International Organization for Standardization (ISO)
Question 11**
Which situation describes a Class III cavity preparation according to G.V. Black's classification system?
A. Caries on the proximal surface of an incisor that does not involve the incisal angle.
B. Caries on the occlusal pits and fissures of a premolar or molar.
C. Caries on the proximal surface of a posterior molar.
D. Caries on the proximal surface of an incisor that involves the incisal angle.
Question 12**
Which type of dental restoration is expected to serve functionally in the oral cavity for several weeks to a few
months while tissue heals or diagnosis is confirmed?
A. Cast restoration
B. Abutment restoration
C. Interim restoration
D. Permanent restoration
Question 13**
Why is biocompatibility testing essential before a new dental biomaterial receives regulatory clearance for
clinical use?
A. To guarantee that the material has an infinite shelf life in the dental office.
B. To verify that the material does not cause toxic, inflammatory, allergic, or carcinogenic reactions in oral
tissues.
C. To ensure the material will match the optical shade of natural teeth under fluorescent lighting.
D. To prevent galvanic corrosion between dissimilar orthodontic appliances.
Question 14**
,Which G.V. Black cavity classification refers specifically to carious lesions or structural defects on the incisal
edges of anterior teeth or cusp tips of posterior teeth?
A. Class VI
B. Class IV
C. Class III
D. Class V
Question 15**
The regulatory agency in the United States that oversees the safety, medical device classification, and
marketing clearance of dental materials is the _______.
Question 16**
The microscopic space existing between the wall of the cavity preparation and the restorative material, through
which fluids, oral bacteria, and ions can penetrate, is termed _______.
Question 17**
According to G.V. Black's cavity classification, a cavity preparation located on the proximal surface of a molar
or premolar is classified as Class _______.
**Extended Matching Questions (EMQ Set - Chapter 1)**
**Theme:** Standards Organizations, Material Classifications, and Cavity Preparation Types
Option Description / Term
A Class I Medical Device
B Class III Medical Device
C Direct Restorative Material
D Indirect Restorative Material
,E Class IV Cavity Preparation
F Preventive Dental Material
Question 18**
A restorative material placed, condensed, and shaped directly into the prepared tooth cavity during a single
clinical appointment.
Question 19**
Dental device category subject to the most stringent regulation, requiring premarket approval (PMA) due to
high potential risk (e.g., endosseous dental implants).
Question 20**
Cavity preparation involving the proximal surface of an anterior tooth that includes the incisal angle.
Question 21**
Material designed to prevent the onset of dental disease, such as a pit and fissure sealant or topical fluoride
gel.
Question 22**
Device category deemed lowest in risk, subject primarily to general manufacturing controls (e.g., dental
examination mirrors and prophy cups).
Question 23**
Restoration fabricated outside the patient's mouth on a master cast before clinical placement and cementation.
Question 24**
Clinical Vignette: A 34-year-old male presents with acute sensitivity to cold liquids on tooth #9. Clinical
evaluation reveals a defect on the mesial surface extending onto the incisal corner caused by a sports injury.
Radiographs demonstrate intact periapical tissues and no pulpal exposure. The clinician prepares the tooth
and places a light-cured resin composite restoration directly during the visit.
Which cavity preparation classification and restoration category are represented in this clinical scenario?
A. Class IV cavity preparation with a direct restoration
, B. Class VI cavity preparation with a direct restoration
C. Class V cavity preparation with an interim restoration
D. Class III cavity preparation with an indirect restoration
Question 25**
Clinical Vignette: A 58-year-old female patient presents for a hygiene examination. The clinician notes a dark
shadow along the gingival margin of a 15-year-old Class I amalgam restoration on tooth #19. Air application
elicits transient discomfort. Exploration reveals breakdown of the marginal seal with bacterial filtration along the
restoration margins.
Which clinical phenomenon is primarily responsible for the marginal breakdown and recurrent caries observed
in this patient?
A. Excessive galvanic stimulation from gold crowns
B. High tensile stress generated during mastication
C. Chronic microleakage leading to bacterial percolation
D. Chemical dissolution of the amalgam in saliva
Answer Key & Rationales - Chapter 1
Question 1:** Answer: B
Rationale: Class II medical devices (such as dental amalgam, resin composite, and dental cements) are
moderate-risk devices that require special controls, including performance standards, FDA clearance (510k),
and post-market surveillance to ensure safety and effectiveness.
Question 2:** Answer: B
Rationale: The American Dental Association (ADA) Council on Scientific Affairs administers the Seal of
Acceptance program, evaluating consumer products (such as toothpastes and mouthrinses) for safety and
clinical efficacy claims.
Question 3:** Answer: B
Rationale: A significant mismatch in the coefficient of thermal expansion (CTE) between tooth structure and
restoration causes differential expansion and contraction during temperature changes. This creates
microleakage and percolation, drawing oral fluids and bacteria into the margin and increasing recurrent caries
risk.
