Course Introduction
Operative Dentistry Review
Questions
Operative Dentistry focuses on the diagnosis, treatment, and prevention of diseases and defects of the tooth structure, primarily caused by dental caries, trauma, or developmental anomalies. This course equips students with theoretical knowledge and practical skills essential for restoring the normal function, esthetics, and integrity of teeth.
Topics include cavity preparation, selection and application of restorative materials, infection control, minimally invasive techniques, and patient management protocols.
Emphasis is placed on evidence-based approaches for managing dental decay and other defects to promote long-term oral health and patient-centered care.
Recommended Textbook
Dental Materials 3rd Edition by W. Stephan Eakle DDS FADM
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Chapter 1: Introduction to Dental Materials
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Sample Questions
Q1) Which of the following represents the standards used to develop specifications and testing on an international level?
A) World Health Organization (WHO)
B) Food and Drug Administration (FDA)
C) American Dental Association (ADA)
D) International Standards Organization (ISO)
Answer: D
Q2) Which of the following statements is true concerning the American Dental Association (ADA)Seal?
A) All dental products qualify for the Seal.
B) It helps consumers make informed decisions about the safety and efficiency of products.
C) The ADA Seal is usually awarded for the life of the product.
D) Once a product has been accepted,it does not need to be reevaluated if its composition changes.
Answer: B
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3
Chapter 2: Oral Environment and Patient Considerations
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Sample Questions
Q1) List and describe the three components of color.
Answer: Hue: The dominant color of the wavelength reflected
Value: How light or dark the color is
Chroma: The intensity or strength of the color
Q2) Which of the following would not be an adverse effect of a material?
A) Toxicity
B) Hyposensitivity
C) Hypersensitivity
D) Postoperative sensitivity
Answer: B
Q3) Corrosion
A)Electrical current between two dissimilar metals
B)Discoloration due to oxidation of the metal's surface
C)Deterioration of the metal due to moisture and acid present in the oral
D)The rate at which heat flows through a material
E)Opening and closing of a gap between the restoration and the tooth surface
Answer: C
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Chapter 3: Physical and Mechanical Properties of Dental Materials
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Sample Questions
Q1) Ultimate strength
A)Resistance to deformation
B)The greatest stress a structure can withstand without permanent deformation
C)The resistance of a solid to penetration
D)The maximum amount of stress a material can withstand without breaking
E)The ability of a material to resist fracture
Answer: D
Q2) What is the maximum amount of stress a material can take before breaking?
A) Ultimate capacity
B) Ultimate strength
C) Material hardness
D) Maximum elasticity
Answer: B
Q3) Working time
A)Begins when the material can no longer be manipulated in the mouth
B)When the material has reached its ultimate state
C)The amount of time the auxiliary has to bring the components together into a homogenous mix
D)The time permitted to manipulate the material within the mouth
Answer: D
5
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Chapter 4: General Handling and Safety of Dental Materials
in the Dental Office
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Sample Questions
Q1) Which of the following would not be considered part of the PPE for laboratory purposes?
A) Gloves
B) Rubber dam
C) Safety glasses
D) Respirator mask
Q2) Which of the following is essential to prevent severe injury if phosphoric,hydrofluoric,or hydrochloric acid is splashed on the skin,eyes,or clothing during manipulation of various dental materials?
A) Calling 911
B) Flushing with water
C) Placing an ointment and a bandage over the affected area
D) Use of a National Institute of Occupational Safety and Health (NIOSH)-approved dust and mist respirator facemask
Q3) What would a mercury spill kit include?
A) 2 × 2 gauze
B) Vinyl gloves
C) A special brush
D) Absorbent powder
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Chapter 5: Principles of Bonding
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Sample Questions
Q1) When a resin bonding agent hardens,it creates projections that lock into the tooth,creating a _____ bond.The resin bonding agent will then form a _____ bond to other resins placed over it,such as composite resin.
A) chemical;chemical
B) chemical;mechanical
C) mechanical;chemical
D) mechanical;mechanical
Q2) What is the wavelength of the curing light?
A) Blue
B) Ultraviolet
C) Incandescent
D) Fluorescent
Q3) When are posts placed within the roots of endodontically treated teeth to retain dental materials used to build up the teeth?
A) When the root needs strengthening
B) When the crown-to-root ratio is poor
C) When a multi-rooted tooth is involved
D) When coronal tooth structure is inadequate for restoration with a crown
Q4) What are the three modes of curing for resin bonding agents?
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Chapter 6: Composites, glass Ionomers, and Compomers
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Sample Questions
Q1) Hybrid composite
A)A light-cured,low-viscosity composite resin that contains fewer filler particles
B)An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter
C)A composite that contains all nano-sized fillers to enhance physical properties
D)A composite that contains both macrofill and microfill particles
E)A composite that contains very small filler particles averaging 0.04 mm in diameter
Q2) Which of the following is correct regarding nanohybrid composite resins?
A) These are weak composites.
B) These composites cannot be polished to a high shine.
C) The shrinkage has been reduced from roughly 3% with earlier composites to less than 1% with some of the nanohybrids.
D) With more resin than previous generations,these composites shrink less when polymerized.
Q3) List the advantages and disadvantages of glass ionomer cements.
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Chapter 7: Preventive and Desensitizing Materials
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Sample Questions
Q1) What will occur if carious teeth are treated with sealants?
A) An acceleration of decay
B) Complete reversal and elimination of all traces of decay
C) An 11% reversal from a caries-active to a caries-inactive state
D) An 89% reversal from a caries-active to a caries-inactive state
Q2) Acid tends to etch the surface of resin,glass ionomer,or compomer when used for in-office fluoride application
A)Acidulated phosphate fluoride (APF)
B)Neutral sodium fluoride (NaF)
C)1.1% Neutral sodium fluoride 5000 ppm restorations made of porcelain,composite fluoride
D)0.4% Stannous fluoride 900 ppm fluoride
E)Fluoride varnish 5.0% sodium fluoride than the other choice of self-applied topical gel
Q3) Which of the following causes of tooth sensitivity may be successfully treated with a desensitizing agent?
A) Dental caries
B) A cracked tooth
C) A leaking restoration
D) Exposed dentinal tubules
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Page 9
Chapter 8: Teeth Whitening Materials and Procedures
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Sample Questions
Q1) This is the active ingredient in at-home bleaching kits.
A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid
Q2) Which of the following statements regarding power-whitening is correct?
A) The patient must return several times in order to get the desired effect.
B) Power-whitening is a permanent procedure.
C) Patients are sent home with custom trays and additional whitening materials.
D) Power-whitening does not cause tooth sensitivity.
Q3) This is mixed with flour pumice and applied to surface discolorations on the tooth.
A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid
Q4) What is the role of the dental assistant or dental hygienist in the delivery of whitening services for the patient?
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Chapter 9: Dental Ceramics
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Sample Questions
Q1) What is the ideal color of the surrounding area during shade matching?
A) Tan
B) Gray
C) Black
D) White
Q2) All-ceramic restorations can be used for which of the following indirect dental restoratives?
1)Inlays
2)Onlays
3)Crowns
4)Veneers
A) 1,2,3,4
B) 1,2,3
C) 1,2,4
D) 1,2
Q3) Which of the following is most challenging when placing veneers?
A) The patient has a diastema.
B) The natural tooth structure is dark.
C) The teeth are rotated out of occlusion.
D) The adjacent teeth have been bleached.
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Chapter 10: Dental Amalgam
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Sample Questions
Q1) The silver alloy phase
A)Gamma phase ( )
B)Gamma-1 phase ( 1)
C)Gamma-2 phase ( 2)
Q2) Why is it not as necessary to polish today's generation of amalgam restorations as it was to polish earlier amalgams?
A) They are high in copper,which is shiny.
B) They are low in copper and don't tarnish.
C) They are well burnished to finish them.
D) They set faster,so it is not necessary.
Q3) Modern dental amalgams are considered to be high in _____ content compared with their predecessors.
A) copper
B) silver
C) zinc
D) tin
Q4) Strongest phase
A)Gamma phase ( )
B)Gamma-1 phase ( 1)
C)Gamma-2 phase ( 2)
Page 12
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Chapter 11: Casting Metals, solders, and Wrought Metal
Alloys
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Sample Questions
Q1) Which description is correct regarding palladium?
A) Is more expensive than gold
B) Has poor corrosion resistance
C) Increases the hardness of the alloy
D) Is a precious metal but it is not considered noble
Q2) Dental wrought wire is primarily used for what purpose?
A) Clasps for removable prosthetic appliances
B) Wires,brackets,and bands used in orthodontics
C) Correcting small marginal deficiencies on onlays and crowns
D) Closing holes ground into the occlusal surface by adjusting the bite
Q3) Which of the following is true concerning grain formation in dental casting alloys?
A) Reheating gold-based alloys will degrade the physical properties.
B) Reheating base-metal alloys will not degrade the physical properties.
C) Large crystals produce more desirable properties in the metal alloy than small crystals do.
D) Iridium or ruthenium is added to gold-base alloys to keep the crystals from growing too large.
Q4) Identify the wrought metals used for orthodontic wires.
Page 13
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Chapter 12: Dental Implants
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Sample Questions
Q1) Allografts
A)Grafts harvested from the patient's body
B)Grafts harvested from a cadaver
C)Grafts obtained from animals
D)Grafts made from inert,synthetic materials
Q2) What is an acrylic guide essential to proper implant placement called?
A) Splint
B) Splice
C) Stent
D) Screw
Q3) Failure of an implant after initial integration is often attributed what cause?
A) Unnatural forces on the implant
B) Poor surgical technique
C) Poor quality of bone
D) Bacterial infection
Q4) Why is titanium used for implants?
A) Is lightweight
B) Does not corrode
C) Is biocompatible
D) All of the above
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Chapter 13: Abrasion, finishing, and Polishing
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Q1) Pumice
A)An extremely fine abrasive used extensively as a final polishing agent for enamel and restorations
B)A natural abrasive composed of quartz and silica
C)Volcanic silica manufactured as a loose abrasive
D)A synthetic material that produces an extremely hard and efficient abrasive material
E)A synthetic abrasive;the powder form is used in sandblasting restorations in preparation for cementation
Q2) Which statement best describes rubber cup polishing?
A) Helps strengthen decalcified enamel
B) Removes some of the fluoride-rich layer of enamel
C) Is used to remove small bits of calculus after scaling
D) Should be used on every patient at his or her recall
Q3) Describe the rationale for selective polishing.
Q4) A higher number of particles or flutes on a rotary finishing bur _____ its abrasive intensity.
A) increases
B) decreases C) has no impact on
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Chapter 14: Dental Cement
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Sample Questions
Q1) Which of the following would not be a reason to place a high-strength base?
A) Promote reparative dentin
B) Decrease thermal sensitivity
C) Increase mechanical support
D) It's condensable
Q2) The addition of powder to dental cement to create a secondary consistency increases the ______ of the cement.
1)viscosity
2)solubility
3)strength
A) 1,2,3
B) 1,2
C) 1,3
D) 2
Q3) Which of the following cements is highest in mechanical strength?
A) Resin cement
B) Hybrid ionomer
C) Zinc polycarboxylate
D) Glass ionomer cement
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Page 16
Chapter 15: Impression Materials
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Sample Questions
Q1) List and describe the different types of impression materials suitable for crown and bridge procedures.
Q2) Why would a dentist choose to use an addition silicone over a condensation silicone?
A) Addition is stronger than condensation.
B) Addition does not distort as badly.
C) Addition is cleaner to use.
D) Addition tastes better.
Q3) Which of the following is the most widely used dental impression material?
A) Reversible hydrocolloid
B) Irreversible hydrocolloid
C) Addition of silicone impression material
D) Condensation silicone impression material
Q4) _____ gloves should be used when mixing PVS putty.
A) Utility
B) Nitrile
C) Latex
D) Vinyl
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Chapter 16: Gypsum and Wax Products
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Sample Questions
Q1) When working models for cast restorations are being made,a die of high-strength stone (Type IV)is often poured with a base and adjacent teeth of Type _____ stone.
A) I
B) II
C) III
D) V
Q2) Which of the following is true of boxing wax?
A) A strip of boxing wax is 3 inches wide.
B) Boxing wax is difficult to manipulate at room temperature.
C) Boxing wax is slightly tacky at room temperature.
D) Boxing wax comes in ropes that are easily manipulated at room temperature.
Q3) As the temperature of the wax increases,the _____ of the wax decreases until the wax becomes a liquid.
A) melting point
B) flowability
C) stability
D) viscosity
Q4) List and describe the use of the different types of gypsum products used in dentistry.
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Chapter 17: Polymers for Prosthetic Dentistry
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Q1) Monomer
A)A long-chain,high-molecular-weight molecule produced by the linking of many low-molecular-weight monomer molecules
B)A polymer composed of numerous methyl methacrylate monomers linked together in a long chain
C)The joining of adjacent long-chain polymers by bonding of short chains along their sides
D)The act of forming polymers.The process can be activated by chemicals,heat,or light.
E)Low-molecular-weight molecules that are joined to form polymers
Q2) The most common form of polymerization in dentistry is:
A) tertiary.
B) addition.
C) propagation.
D) condensation.
Q3) Which of the following does not apply to porcelain denture teeth?
A) They are hard.
B) They are esthetic.
C) They are easily repaired.
D) They are stain resistant.
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Page 19
Chapter 18: Provisional Restorations
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Q1) A/An _____ provisional crown is crimped and contoured at the contact and margins with crimping and contouring pliers.
A) polycarbonate
B) celluloid crown form lined with composite
C) aluminum shell
D) stainless steel
Q2) Provisional restorations are recommended only for 2 to 3:
A) days
B) weeks
C) months
D) There is no time limit.
Q3) Which condition below would not require a preformed crown to be used?
A) Anterior crown prep
B) Posterior crown prep
C) Fractured anterior tooth
D) Three-unit posterior bridge prep
Q4) List and describe the four criteria for provisional coverage.
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Chapter 19: Preventive and Corrective Oral Appliances
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Sample Questions
Q1) What is a risk factor for obstructive sleep apnea (OSA)?
A) Obesity
B) Large neck
C) High blood pressure
D) All of the above
Q2) A sports guard thickness of about _____ mm is desirable for heavy contact sports in which injuries are more likely.
A) 1
B) 2
C) 4
D) 8
Q3) Which type of tooth aligner would be used for minor tooth movement?
A) Space maintainer
B) Acrylic bite guard
C) Thermoplastic guard worn at night
D) Removable acrylic base with embedded wires
Q4) What instructions would be given to a patient who receives a soft sports or bruxism guard?
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