Restorative Dentistry
Textbook Exam Questions
Course Introduction
Restorative Dentistry focuses on the diagnosis, prevention, and treatment of diseases and defects of the teeth, aiming to restore function, aesthetics, and oral health. The course covers restorative procedures such as fillings, crowns, bridges, and the use of advanced materials and technologies for tooth restoration. Students learn to assess different types of dental lesions, develop treatment plans, and apply evidence-based techniques to manage carious and non-carious defects. Emphasis is placed on patient-centered care, precision in operative techniques, and the integration of digital tools to optimize restorative outcomes and long-term oral health maintenance.
Recommended Textbook
Dental Materials Properties and Manipulation 10th Edition by John M. Powers
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Chapter 1: Introduction to Restorative Dental Materials
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Sample Questions
Q1) The tooth tissue most susceptible to caries in older adults is:
A) enamel.
B) dentin.
C) pulp.
D) cementum.
Answer: D
Q2) Which of the following would not be considered an extracoronal,or indirect placement,restoration?
A) Veneer
B) Crown
C) Amalgam
D) Onlay
Answer: C
Q3) The phrase fixed bridge is a common term to describe a: A) complete denture.
B) removable partial denture.
C) fixed partial denture.
D) single tooth implant.
Answer: C
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Page 3
Chapter 2: Properties of Materials
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Sample Questions
Q1) The change in the length or deformation of a material when subjected to force is:
A) flexure.
B) strain.
C) shear.
D) tensile.
Answer: B
Q2) Of the following materials,which has the closest coefficient of expansion to tooth structure?
A) Amalgam
B) Ceramic
C) Filled polymers
D) Composite resins
Answer: B
Q3) Cavity varnishes and liners are ineffective as thermal insulators because they: A) have high thermal conductivity.
B) have a high coefficient of thermal expansion.
C) have a low coefficient of thermal expansion.
D) are used in thin layers.
Answer: D
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Page 4
Chapter 3: Preventive Dental Materials
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Sample Questions
Q1) Which of the following statements is(are)true of custom-made mouth protectors?
A) Athletes prefer the custom-made mouth protector over mouth-formed and stock mouth protectors.
B) Custom-made mouth protectors are more expensive than mouth-formed or stock mouth protectors.
C) Custom-made mouth protectors are less likely to interfere with speech than mouth-formed or stock mouth protectors.
D) A, B and C are true.
E) A and C are true.
Answer: D
Q2) Sealants are polymerized by using a(n)_____ spectrum light.
A) ultraviolet.
B) incandescent.
C) fluorescent.
D) visible.
Answer: D
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Chapter 4: Direct Esthetic Restorative Materials
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Sample Questions
Q1) Organic fillers that are radiolucent include:
A) crystalline silica.
B) lithium aluminum silicate.
C) strontium.
D) all of the above.
E) only A and B.
Q2) Which type of composite has the smallest filler particle size?
A) Microhybrid
B) Microfilled
C) Nanofilled
D) Packable
E) Flowable
Q3) When microhybrid composites are contrasted with microfilled composites:
A) microhybrid composites have more polymerization shrinkage.
B) microfilled composites have a higher linear coefficient of thermal expansion.
C) microhybrid composites have higher water sorption.
D) microfilled composites have higher compressive strength.
E) microhybrid composites have a lower elastic modulus in compression.
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Chapter 5: Dental Amalgam
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Sample Questions
Q1) Today's dental amalgam:
A) is high in zinc.
B) is low in copper.
C) has high longevity.
D) has placement issues.
Q2) Which of the following statement(s)is(are)true of the property of creep for amalgam restorations?
A) It is associated with the breakdown of marginal integrity.
B) High-copper amalgams have values of creep far above old low-copper amalgams.
C) The ANSI/ADA requires that creep be less than 3%.
D) A, B, and C are true.
E) A and C are true.
Q3) Tarnish:
A) is a surface phenomenon.
B) is the result of chemical reactions that penetrate into the body of the amalgam.
C) is equivalent to corrosion.
D) eventually leads to failure of the restoration.
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Chapter 6: Finishing, polishing, and Cleansing Materials
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Sample Questions
Q1) What is the purpose of a humectant in toothpaste?
A) Function as an abrasive
B) Prevent dehydration
C) Function as a binder
D) Prevent dental caries
E) Reduce the rate of formation of supragingival calculus
Q2) Some fast-setting,high-copper amalgams can be polished about 8 to 12 minutes after placement with a _____ paste of extra-fine _____ and water in a rubber cup.
A) dry; silex
B) dry; tin oxide
C) creamy; silex
D) creamy; tin oxide
Q3) Which of the following materials is the most difficult to remove from a tooth surface during tooth prophylaxis?
A) Acquired pellicle
B) Food debris
C) Plaque
D) Calculus
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Chapter 7: Cements
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Sample Questions
Q1) Cavity liners and varnishes:
A) function as a protective barrier between dentin and the restorative material.
B) protect the pulp from the high pH of calcium hydroxide.
C) minimize the ingress of oral fluids at the restoration-tooth interface.
D) do A, B, and C.
E) do A and C.
Q2) Which of the following statements is true of the manipulation of zinc polycarboxylate cement?
A) The liquid is added to the powder.
B) The mixing time is about 3 minutes.
C) The cement should be mixed over a large area of the mixing surface.
D) The proper consistency is creamy.
Q3) Adhesive resin cement would not be used in the cementation of:
A) metal ceramic crown.
B) alloys.
C) indirect esthetic restoration.
D) all of the above.
E) A and B only.
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9
Chapter 8: Impression Materials
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Sample Questions
Q1) The best method for delaying the setting of alginate is to:
A) reduce the water temperature.
B) increase the water temperature.
C) use a thinner mix of alginate.
D) use a thicker mix of alginate.
Q2) Advantages of elastomeric impression materials in contrast to alginate hydrocolloid materials include:
A) greater accuracy.
B) dimensional stability with time.
C) ability to record detail.
D) both A and C.
Q3) An accepted method for modifying an impression tray would include:
A) applying rope wax to the flanges.
B) heating the tray to alter the configuration.
C) adding compound to the edges.
D) none of the above.
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Chapter 9: Model and Die Materials
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Sample Questions
Q1) Which of the following types of gypsum products is also known as die stone?
A) Impression plaster
B) Model plaster
C) Dental stone
D) High-strength/low-expansion dental stone
E) High-strength/high-expansion dental stone
Q2) When a model or die is wet,its compressive and tensile strength is approximately _____ its strength when dry.
A) 4 times
B) twice
C) one-half
D) one-quarter
E) one-sixteenth
Q3) The impression should not be removed from the gypsum for _____ minutes.
A) 3 to 5
B) 5 to 10
C) 10 to 20
D) 20 to 40
E) 45 to 60
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Page 11
Chapter 10: Waxes
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Sample Questions
Q1) Organic molecules in waxes are composed primarily of long chains containing carbon,hydrogen,and oxygen.The long chains allow waxes to be flexible at room temperature or sticky as solids or liquids.
A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second statement is false.
D) The first statement is false; the second statement is true.
Q2) Which of the following statements is true of pattern waxes and resins?
A) They must possess high flow at their working temperature.
B) They must have a melting range lower than the environment in which the pattern is made.
C) Too high of a melting range may make development of residual stresses a problem.
D) All pattern waxes and resins must burn out with a residue.
Q3) Which of the following is a plant wax that may be found as a component of inlay wax?
A) Paraffin
B) Ceresin
C) Carnauba
D) Beeswax
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Page 12
Chapter
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Sample Questions
Q1) When a molten (liquid)alloy freezes,crystals _____ and _____ as the material cools.
A) dissolve; disperse
B) grow; disperse
C) form; dissolve
D) form; grow
Q2) An alloy liquidus is defined as the temperature at which:
A) an alloy begins to melt.
B) all of the alloy melts.
C) some of the alloy freezes upon cooling.
D) all of the alloy freezes upon cooling.
Q3) Palladium:
A) has poor corrosion resistance.
B) has a much lower melting point than gold.
C) is much harder than gold.
D) may be used in pure form for dental restorations.
E) both B and C.
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Chapter 12: Casting and Soldering
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Sample Questions
Q1) Because cast metal shrinks as it freezes,investment must _____ as it sets.
A) shrink
B) expand
C) stay the same
Q2) Which of the following statements is true of investments used for casting?
A) The refractory material in most dental investment is a form of calcium.
B) The binder, but not the refractory material, contributes to expansion of the investment.
C) The refractory material, but not the binder, contributes to expansion of the investment.
D) The binder and the refractory material contribute to expansion of the investment.
E) The binder and the refractory material contribute to contraction of the investment.
Q3) The purpose of a sprue is to:
A) form the occlusal surface of a casting.
B) form a channel in investment through which the molten alloy travels to form the casting.
C) form the proximal surface of a casting.
D) reduce the metal content of a casting.
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Page 14
Chapter 13: Polymers in Prosthodontics
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Sample Questions
Q1) When removed from the mouth,dentures:
A) should be boiled and then air dried to kill bacteria and fungi.
B) are best stored in water.
C) should be stored in rubbing alcohol.
D) should be desiccated with acetone to prevent ingress of bacteria.
Q2) Which of the following statements is true of the process of polymerization?
A) Polymerization is a chemical reaction that links small inorganic compounds called monomers into long chains of repeating monomer subunits.
B) Polymers with high degrees of conversion have high levels of residual monomer.
C) Polymers that form by simple addition may not shrink as much as those that form by condensation.
D) Most prosthodontic polymers expand significantly as polymerization proceeds.
Q3) A homopolymer:
A) contains multiple types of monomers.
B) contains one type of monomer.
C) contains no monomer.
D) does not polymerize.
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Chapter 14: Dental Ceramics
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Sample Questions
Q1) Which of the following is the most common application of ceramics in dentistry today?
A) Denture teeth
B) Porcelain-jacket restorations
C) Ceramic-alloy restorations
D) All-ceramic restorations
Q2) During firing,the particles of ceramic melt together at their edges in a process called:
A) condensation.
B) sintering.
C) abfraction.
D) rheology.
Q3) The principal advantage of any all-ceramic crown in contrast to a ceramic-alloy crown is:
A) simpler manufacturing process.
B) lower cost.
C) superior fracture resistance.
D) excellent esthetics.
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Chapter 15: Dental Implants
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Sample Questions
Q1) For an implant to be successful,osseointegration must be maintained for:
A) 6 weeks.
B) 6 months.
C) the first year.
D) the first 3 years.
E) the lifetime of the implant.
Q2) During two-step endosseous implant placement,a _____ is placed on top of the implant to cover internal threads once the implant is placed into bone.
A) temporary stayplate
B) space maintainer
C) temporary acrylic spacer
D) healing cap
Q3) For most clinical situations,implant success rates are more than ____% as long as the implant osseointegrates initially and the clinical environment is not extreme.
A) 50
B) 75
C) 90
D) 95
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