Operative Dentistry Exam
Bank
Course Introduction
Operative Dentistry is a foundational course that introduces students to the principles and techniques involved in the diagnosis, prevention, and treatment of dental caries and other defects in tooth structure. The course covers topics such as cavity preparation, restorative materials, techniques for direct and indirect restorations, and the maintenance of dental health. Emphasis is placed on the scientific basis of restorative procedures, preservation of tooth structure, aesthetics, patient comfort, and adherence to infection control protocols. Through a combination of theoretical instruction, laboratory exercises, and clinical practice, students gain the essential skills necessary for restoring teeth to proper form, function, and appearance.
Recommended Textbook
Dental Materials 3rd Edition by W. Stephan Eakle DDS FADM
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19 Chapters
643 Verified Questions
643 Flashcards
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Page 2
Chapter 1: Introduction to Dental Materials
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20 Verified Questions
20 Flashcards
Source URL: https://quizplus.com/quiz/24493
Sample Questions
Q1) Silver paste was first mentioned as a restorative material for teeth by the:
A) Chinese.
B) Greeks.
C) Romans.
D) French.
Answer: A
Q2) Until 1970,which of the following groups of dental auxiliaries were allowed to perform intraoral functions in all states?
1)Dental hygienists
2)Registered dental assistants
3)Certified dental assistants
4)On-the-job trained dental assistants
A) 1,2,3,4
B) 1,2,3
C) 1,2
D) 1
Answer: D
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Page 3
Chapter 2: Oral Environment and Patient Considerations
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43 Verified Questions
43 Flashcards
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Sample Questions
Q1) Some dental materials may be therapeutic in small quantities or if in contact with tissues for a short period of time.Dental materials may be irritating or toxic with longer or larger doses.
A) Both statements are true.
B) Both statements are false.
C) The first statement is true,and the second statement is false.
D) The first statement is false,and the second statement is true.
Answer: A
Q2) What could excessive expansion of a restorative material result in?
A) Corrosion
B) Galvanism
C) Fracture of cusps
D) Leakage of fluid and bacteria into the gaps
Answer: C
Q3) Adhesion is the method of _____ retention.
A) chemical
B) mechanical
C) dual
Answer: A
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Page 4
Chapter 3: Physical and Mechanical Properties of Dental Materials
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36 Verified Questions
36 Flashcards
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Sample Questions
Q1) List and describe the three different classifications of dental materials.
Answer: Preventive materials: Directed toward preventing the occurrence of oral disease and promoting oral health.
Therapeutic materials: Used in the treatment of disease and include materials such as medicated bases or topical treatments for periodontal disease.
Restorative materials: Applies to any filling,inlay,crown,bridge,implant,or partial or complete denture that restores or replaces lost tooth structure,teeth,or oral tissue.
Q2) Toughness
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: E
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5
Chapter 4: General Handling and Safety of Dental Materials
in the Dental Office
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37 Verified Questions
37 Flashcards
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Sample Questions
Q1) Ignitable
A)The substance is either highly acidic or basic with a pH less than 2.0 or greater than 12.5.
B)The substance contains amounts of arsenic,barium,chromium,mercury,lead,silver,or certain pesticides.
C)The substance is flammable or combustible.
D)The substance is chemically unstable or explosive,reacts violently with water,or is capable of giving off toxic fumes when mixed with water.
Q2) When would one wear a rubber or neoprene apron?
A) Assisting with treatment of all dental patients
B) Mixing or pouring chemicals that are caustic
C) Assisting with acids used for bonding procedures
D) Grinding partial denture frameworks containing beryllium
Q3) Who has the responsibility of assessing hazardous chemicals and then passing the information to consumers?
A) Occupational Safety and Health Administration
B) Organization for Safety and Asepsis Procedures
C) Centers for Disease Control and Prevention
D) Chemical manufacturers
Page 6
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Chapter 5: Principles of Bonding
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34 Flashcards
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Sample Questions
Q1) The most commonly used etchant or conditioner for tooth bonding is _____ in concentrations ranging from 10% to 38%.
A) acetic acid
B) phosphoric acid
C) hydrochloric acid
D) sodium perborate
Q2) The clinical technique of post cementation involves thoroughly rinsing off the phosphoric acid used to etch the canal and removing excess water with a:
A) paper point.
B) cotton pellet.
C) composite application brush.
D) 3-cc syringe with a blunt-end cannula.
Q3) Hypersensitivity may occur when _____ are irritated by procedures or chemicals associated with composite resin restorations.
A) ameloblasts
B) osteoblasts
C) odontoblasts
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) To avoid shrinkage,how should composite resins be placed into a preparation?
A) In large increments
B) In small increments
C) The material does not shrink.
Q2) In general,it is recommended that light-cured composite be placed in increments no thicker than ____ mm.
A) 1.0
B) 2.0
C) 4.0
D) 8.0
Q3) Which of the following types of curing lights is currently the most popular?
A) Plasma arc (PAC)
B) Laser (initially argon laser)
C) Light-emitting diode (LED)
D) Halogen (quartz-tungsten-halogen,or QTH)
Q4) Which part of the tooth is generally closest to the dentin in color?
A) Body
B) Cervical
C) Incisal area of anterior teeth
D) Occlusal area of posterior teeth
Page 8
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Chapter 7: Preventive and Desensitizing Materials
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38 Verified Questions
38 Flashcards
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Sample Questions
Q1) 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
Q2) The use of a bonding agent with pit and fissure sealants _____ their longevity.
A) decreases
B) increases
C) has no effect on
Q3) Which of the following is not an indication for pit and fissure sealants?
A) Deep,sticky pits
B) Coalesced grooves
C) Uncoalesced grooves
D) Discoloration of pits
Q4) Which of the following would not be considered a topical fluoride application?
A) Daily mouth rinse
B) Vitamin with fluoride
C) Fluoridated toothpaste
D) 6-month in-office application
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Chapter 8: Teeth Whitening Materials and Procedures
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24 Verified Questions
24 Flashcards
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Sample Questions
Q1) Which of the following statements is true regarding types of tooth stains?
A) Intrinsic stains are on the tooth surface.
B) All extrinsic stains can be removed by hand or ultrasonic scaling and coronal polishing.
C) In general,yellow-brown discolorations are easier to bleach than blue-gray and black colors.
D) Tetracycline derivatives such as minocycline will cause discoloration of teeth in children but not in adults.
Q2) These stains form on the surface of the teeth and are caused by food,drink,smoking,and a variety of other sources.
A)Extrinsic stains
B)Intrinsic stains
C)Hydrogen peroxide
D)Carbamide peroxide
E)Hydrochloric acid
Q3) 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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36 Verified Questions
36 Flashcards
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Sample Questions
Q1) Violet color
A)Long wavelength
B)Short wavelength
C)High value
D)Low value
E)High chroma
Q2) Which of the following is true of computer-aiding machining for crown and bridge techniques?
A) It is available only for fabrication of porcelain veneers.
B) No die needs to be poured,and no temporary crown is necessary.
C) A porous ceramic core is infiltrated with molten glass by capillary action.
D) Ceramic powder is mixed with a water-based liquid to form a mass that is pressed onto a porous refractory die.
Q3) When porcelain particles are melted and fused to metal,what is the process known as?
A) Firing
B) Smelting
C) Bonding
D) Sintering
Q4) Describe the different techniques for fabrication of ceramic restorations.
Page 11
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Chapter 10: Dental Amalgam
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39 Flashcards
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Sample Questions
Q1) In the low-copper amalgams,zinc was responsible for the gradual _____ of the amalgam over time if moisture contamination was present during placement.
A) tarnish
B) corrosion
C) expansion
D) contraction
Q2) Compared to composites or glass ionomers,amalgams are higher in compression strength but weaker in:
A) stress and shear.
B) stress and strain.
C) tension and shear.
D) flexion and tension.
Q3) High-copper alloys gain about 50% of their compressive strength:
A) after 1 hour.
B) after 10 hours.
C) after 24 hours.
D) immediately.
Q4) List the advantages and disadvantages of amalgam.
Q5) Describe the different particle shapes in amalgam alloys.
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Chapter 11: Casting Metals, solders, and Wrought Metal
Alloys
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35 Verified Questions
35 Flashcards
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Sample Questions
Q1) Which of the following is true concerning the use of endodontic files and reamers in dentistry?
A) Rotary instruments are usually composed of stainless steel alloys.
B) Nickel-titanium files are far more flexible than stainless steel files.
C) Stainless steel files become more flexible as the diameter of the file increases.
D) Reamers are similar to files except that they have more twists in the metal and cut faster.
Q2) Why are silver-based solders used primarily in dentistry?
A) Add contacts to a bridge
B) Join together units of a bridge
C) Create wires,brackets,and bands used in orthodontics
D) Solder wire components to removable orthodontic appliances
Q3) Which of the following metals is added to both gold and silver solders to lower the melting range?
A) Tin
B) Borax
C) Indium
D) Potassium fluoride
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) 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
Q2) What is the purpose of the acrylic resin surgical guide (stent)?
A) The stent is the drill used to cut into the bone.
B) The stent holds the patient's mouth open during implant placement surgery.
C) Predetermined holes in the stent allow the surgeon to cut a hole into bone for the implant at the correct angulation.
D) The stent is placed near the back of the throat to prevent the patient from swallowing any foreign objects during surgery.
Q3) During a two-stage endosseous surgical implant placement procedure,the healing abutment is placed about _____ following placement of the implant fixture.
A) 1 week
B) 1 month
C) 3 months
D) 1 year
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Chapter 13: Abrasion, finishing, and Polishing
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37 Flashcards
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Sample Questions
Q1) Which of the following is correct about pumice?
A) Frequently found in block form,which is then run onto a rag wheel to polish precious and semiprecious metal alloys in the laboratory
B) Used in coated disks and bonded rotary devices primarily used in finishing procedures
C) A major component of many prophylaxis pastes used to polish tooth structure,dental amalgam,and acrylic bases
D) Used to smooth enamel,or finish metal alloys and ceramic materials
Q2) Tin oxide
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
Q3) Describe the rationale for selective polishing.
Q4) Define finishing,polishing,and cleansing.
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Page 15
Chapter 14: Dental Cement
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36 Flashcards
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Sample Questions
Q1) Primary consistency
A)A thin layer of material placed to protect the tooth from the components of dental materials and microleakage,stimulate reparative dentin,or act as a pulp capping
B)A thin layer placed on the floor and walls of the preparation to seal tubules and minimize microleakage
C)A thick layer of cement used to protect the tooth from chemical and thermal irritation
D)Thick,putty-like,condensable material that can be rolled into a ball or rope,suitable for use as a base
E)Less viscous,flows easily,can be drawn to a 1-inch string with a spatula,suitable for luting
Q2) Which of the following cements is highest in mechanical strength?
A) Resin cement
B) Hybrid ionomer
C) Zinc polycarboxylate
D) Glass ionomer cement
Q3) List the advantages and disadvantages of zinc oxide eugenol,zinc phosphate,zinc polycarboxylate,traditional glass ionomer,hybrid ionomer,and resin-based cements.
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Page 16
Chapter 15: Impression Materials
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36 Flashcards
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Sample Questions
Q1) List and describe the different types of impression materials suitable for crown and bridge procedures.
Q2) Which of the following is true for hydrocolloids in dentistry?
A) Agar hydrocolloid is a reversible hydrocolloid.
B) Agar hydrocolloid requires the use of custom impression trays.
C) The main clinical use of reversible hydrocolloid is for impressions for diagnostic casts.
D) When agar powder is mixed with water,it forms a gluelike suspension that entraps the water,making a colloidal suspension called a gel.
Q3) Which characteristic should be considered when choosing an impression tray?
A) Be large enough to fit all oral structures
B) Be rigid to support the impression material
C) Accurately reproduce vestibules
D) All of the above are considered.
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) The _____ the particles of gypsum powder are,the weaker and less resistant to abrasion is the final product.
A) smaller,more irregular,and denser
B) smaller,more regular,and more porous
C) larger,more irregular,and more porous
D) larger,more regular,and denser
Q2) Utility wax may be used to:
1)adapt the periphery of an impression tray.
2)provide a better fit into the vestibule of the impression material.
3)cover sharp brackets and wires for orthodontic patients.
A) 1,2,3
B) 1,2
C) 2,3
D) 1
Q3) For regular-set gypsum products,the initial set occurs within _____ minutes from the beginning of the mix.
A) 1 to 2
B) 3 to 5
C) 7 to 9
D) 12 to 14
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Chapter 17: Polymers for Prosthetic Dentistry
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Sample Questions
Q1) What is the result of the loss of monomer or inadequate pressure during processing?
A) A brittle material
B) Shrinkage of the material
C) Porosities in the material
D) Discoloration of the material
Q2) Which of the following correctly represents the stages seen when acrylic powder and liquid are mixed together?
A) Dough,sandy,rubber,and stringy
B) Stringy,sandy,dough,and rubber
C) Sandy,stringy,dough,and rubber
D) Rubber,stringy,dough,and sandy
Q3) In an addition polymerization reaction,the free radical initiates what reaction?
A) Opening the bond between the two carbon atoms of the monomer
B) Reversing the polarity of the monomer chain
C) Creating a bend in the carbon atom
D) Excluding divalent cations
Q4) Describe how a denture is fabricated using heat-cured resin.
Q5) Describe the process of addition polymerization.
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Chapter 18: Provisional Restorations
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Sample Questions
Q1) If the provisional restoration itself is too high,the results may be those associated with:
A) trauma from occlusion.
B) occlusal drifting of the prepared tooth.
C) gingival irritation from food impaction.
D) lateral migration of the prepared tooth.
Q2) Accurate margins of an extracoronal provisional restoration are important because they:
A) maintain accurate contour.
B) protect the tooth from microleakage.
C) keep food from packing into the embrasure.
D) maintain occlusion and prevent supereruption.
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) Which statement best describes a soft guard?
A) Made from acrylic
B) Constructed in a dental lab
C) Requires less time to adjust
D) Requires more time to adjust
Q2) What is the best method of proper home care for guards?
A) Brush with toothpaste to remove debris.
B) Soak in mouthwash to remove odors.
C) Store in water when not in use.
D) Allow to air-dry in a rigid container.
Q3) In what situation would the dentist prescribe a night guard for a patient?
A) If the patient has sleep apnea
B) If there are signs of grinding
C) If there is an unexplained tooth fracture,wear,or chips
D) Only b and c are correct.
E) All are correct.
Q4) What instructions would be given to a patient who receives a soft sports or bruxism guard?
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