Prosthodontics Study Guide Questions
Course Introduction
Prosthodontics is a specialized field of dentistry that focuses on the diagnosis, treatment planning, rehabilitation, and maintenance of oral function, comfort, appearance, and health of patients with missing or deficient teeth and oral and maxillofacial tissues. This course covers the principles and techniques involved in the design, fabrication, and fitting of dental prostheses, including crowns, bridges, dentures, and implants. Students will learn about material science, occlusion, esthetics, and digital technologies in prosthodontics, as well as the management of complex clinical cases to restore oral function and improve patients quality of life.
Recommended Textbook
Dental Materials 3rd Edition by W. Stephan Eakle DDS FADM
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643 Verified Questions
643 Flashcards
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Chapter 1: Introduction to Dental Materials
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Sample Questions
Q1) According to the earliest historical mention,in which location was fluoride first used?
A) China
B) Prussia
C) England
D) Colorado Springs
Answer: C
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
Q3) What would be the four characteristics of the perfect dental material?
Answer: The perfect dental material would be biocompatible,bond permanently to tooth structure,be esthetic with the tooth/tissue structures,and repair or regenerate missing tissues.
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Chapter 2: Oral Environment and Patient Considerations
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Sample Questions
Q1) Tarnish
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: B
Q2) 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
Q3) What is the thermal conductivity of composite resin?
A) Similar to tooth structure
B) Lower than tooth structure
C) Similar to metal restorations
D) Does not conduct temperature
Answer: A
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Chapter 3: Physical and Mechanical Properties of Dental Materials
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Sample Questions
Q1) 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
Q2) Dual set materials utilize _____ setting reactions.
A) both light-activated and chemical
B) light-activated but not chemical
C) chemical setting but not light-activated
D) neither light-activated nor chemical
Answer: A
Q3) Which of the following is the hardest material?
A) Enamel of a tooth
B) Cementum of a tooth
C) Cast gold restorative material
D) Composite resin restorative material
Answer: A
Page 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 is true for control of a mercury spill?
A) Mercury spill kits are required only for offices that use free rather than precapsulated mercury;thus mercury spill kits do not have to be available in all dental offices that use amalgam for restorations.
B) Mercury can be absorbed through the skin,but as a metal it is very dense,and there is no risk of inhalation of mercury vapors.
C) The spill kit for small amounts of mercury should contain a handheld vacuum cleaner.
D) A mask and utility-type gloves should be worn whenever cleaning a mercury spill.
Q2) A hazardous chemical is any substance that what?
1)Can catch fire
2)Can react or explode when mixed with other substances
3)Is corrosive or toxic
4)May cause infection or disease
A) 1,2,3,4
B) 1,2,3
C) 2,3,4
D) 1,3
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Chapter 5: Principles of Bonding
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Sample Questions
Q1) Which of the following statements is true concerning bond strength?
A) The bond strength to dentin is usually greater than to enamel.
B) Bonding to enamel usually achieves consistently high bond strengths of around 60 MPa (megapascals).
C) The dentin near the dentinoenamel junction (DEJ)has more dentinal tubules,and they are larger in diameter than in dentin closer to the pulp.
D) Wetter dentin with more holes is more difficult to bond to consistently than shallower dentin.
Q2) Total-etch system
A)An attribute that allows a material to tolerate the presence of moisture
B)A bonding system that does not use a separate etching procedure with phosphoric acid
C)A resin/dentin layer formed by the intermixing of the dentin bonding agent with collagen fibrils exposed by acid etching
D)An attribute that does not allow a material to tolerate or perform well in the presence of moisture
E)A bonding system that includes etching of both enamel and dentin as a separate step from the application of 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) Nanohybrids have a particle size of _____ microns (mm).
A) 0.1 to 0.4
B) 310 to 100
C) 0.03 to 0.5
D) 0.005 to 0.020
Q3) 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.
Q4) List the advantages and disadvantages of glass ionomer cements.
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8
Chapter 7: Preventive and Desensitizing Materials
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Sample Questions
Q1) The use of a bonding agent with pit and fissure sealants _____ their longevity.
A) decreases
B) increases
C) has no effect on
Q2) Which information regarding the sealant procedure does not need to be documented in the patient's chart?
A) Etch time
B) Type of material
C) Type of isolation
D) Tooth number and surface
Q3) What is the oxygen-inhibited layer on cured dental sealant?
Q4) Which of the following is true of the oxygen-inhibited layer on cured dental sealant?
A) It is the most thoroughly cured portion because it is closest to the curing light.
B) It occurs because the set of the resin at its surface is inhibited by contact with oxygen in the air.
C) It contains bisphenol,an estrogen-like chemical associated with precocious puberty.
D) It allows the clinician to see and detect the presence of the sealant.
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Chapter 8: Teeth Whitening Materials and Procedures
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Sample Questions
Q1) Sodium peroxyborate monohydrate (Amosan)is utilized with _____ bleaching.
A) vital external
B) vital internal
C) devital external
D) devital internal
Q2) What is the role of the dental assistant or dental hygienist in the delivery of whitening services for the patient?
Q3) Which of the following statements is true regarding home bleaching prescribed by the dentist?
A) The material consists of clear,flexible strips containing a peroxide gel that are adapted over the teeth and worn for 30 minutes at a time once or twice a day.
B) Only the anterior six teeth are covered.
C) The gel is placed in a custom-formed soft,thin plastic tray and is worn by the patient for periods as short as 30 minutes twice daily or as long as overnight.
D) The home bleaching process is less effective than the in-office process.
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Chapter 9: Dental Ceramics
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Sample Questions
Q1) Pressed ceramic veneers are _____ than feldspathic porcelain veneers and are too _____ for very dark teeth.
A) thinner;translucent
B) thinner;opaque
C) thicker;translucent
D) thicker;opaque
Q2) Which of the following is not a characteristic used for taking shades?
A) Translucency
B) Chroma
C) Value
D) Hue
Q3) 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.
Q4) Describe the different techniques for fabrication of ceramic restorations.
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Chapter 10: Dental Amalgam
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Sample Questions
Q1) Spherical alloys require _____ mercury to wet the particles and generally set _____ than lathe-cut particles.
A) more;more quickly
B) more;more slowly
C) less;more quickly
D) less;more slowly
Q2) Amalgam goes through three phases when setting,the weakest of which is the _____ phase.
A) gamma
B) gamma-1
C) gamma-2
Q3) 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.
Q4) List the main components of amalgam alloy and describe their function.
Q5) List the advantages and disadvantages of amalgam.
Q6) Describe the different particle shapes in amalgam alloys.
Page 12
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Chapter 11: Casting Metals, solders, and Wrought Metal
Alloys
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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) 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
Q3) Which of the following base metals has the highest incidence of allergic response?
A) Nickel
B) Chromium
C) Beryllium
D) Gallium
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) Which of the following are recommended for use with titanium implants?
A) Air polishers
B) Steel curettes
C) Ultrasonic scalers
D) Plastic or graphite curettes and scalers
Q2) Failure of the implant that occurs after the initial integration is often caused by which condition(s)?
1)Bacterial infection extending from the peri-implant tissues into the bone
2)Generation of excessive heat when the implant hole is drilled into the bone
3)Overloading of the implant during function
A) 1,2,3
B) 1,2
C) 1,3
D) 2
Q3) The _____ implant is the most commonly used in dentistry today.
A) supraperiosteal
B) subperiosteal
C) transosteal
D) endosseous
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Page 14
Chapter 13: Abrasion, finishing, and Polishing
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Sample Questions
Q1) Abrasive particles that are _____ will cut more efficiently.
A) large and regular
B) large and irregular
C) small and regular
D) small and irregular
Q2) The benefits of a properly finished and polished restoration/prosthesis include _____ biofilm retention and _____ resistance to tarnish and corrosion.
A) increased;increased B) increased;decreased C) decreased;increased D) decreased;decreased
Q3) How does prophylaxis paste differ from commercially prepared dentifrice?
A) It is less abrasive.
B) It is more abrasive.
C) It may contain fluoride.
D) There is little difference.
Q4) Describe the rationale for selective polishing.
Q5) Define finishing,polishing,and cleansing.
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Chapter 14: Dental Cement
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Sample Questions
Q1) When is zinc polycarboxylate cement no longer usable?
A) Has a creamy appearance
B) Loses its gloss and becomes stringy
C) Is mixed for longer than 10 seconds
D) Becomes oily on the surface because of the oxygen-inhibited layer
Q2) Which cement is recommended for metal-free restoration?
A) Glass ionomer cement
B) Resin-based cement
C) Hybrid ionomer cement
D) Resin-modified glass ionomer cement
Q3) Which type of cement is recommended for cementing thicker ceramic restorations where light would not penetrate adequately?
A) Sedative
B) Dual-cure
C) Provisional
D) Chemical-cure
Q4) 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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16
Chapter 15: Impression Materials
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Sample Questions
Q1) Of the items listed,which would not be made from an alginate impression?
A) Mouth guard
B) Bleaching tray
C) Retainer
D) Onlay
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) When mixing alginate,as the water temperature increases,the working time: A) increases.
B) decreases.
C) stays the same.
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Chapter 16: Gypsum and Wax Products
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Sample Questions
Q1) Which of the following is true of the double-pour method for fabricating and trimming diagnostic/working casts?
A) This technique involves two separate mixes.
B) After the impression is poured,the remaining material is used for the base.
C) One mix of gypsum is produced to pour the anatomic and art portions of the cast.
D) The material in the inverted impression may slump away from the impression,causing distortion of the cast or trapping or air voids.
Q2) Sheets of baseplate wax are usually layered to:
A) produce patterns for metal castings using the lost wax technique.
B) construct the metal framework of partial and complete dentures.
C) produce the form on which denture teeth are set.
D) form the base portion of a gypsum model.
Q3) 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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Sample Questions
Q1) What are record bases used for?
A) To obtain secondary impressions for creation of secondary or master casts
B) To establish the proper dimension between upper and lower arches
C) To obtain final crown and bridge impressions
D) To fabricate porcelain veneers
Q2) When the acrylic powder and liquid are mixed,the chemical- and heat-cured materials go through a similar reaction,except that chemical-cured materials have a _____ in the liquid as an activator,whereas heat-cured materials do not.
A) benzoyl peroxide
B) hydroquinone
C) glycol dimethacrylate
D) tertiary amine
Q3) Why must dentures be relined periodically?
A) Dentures absorb odors from plaque and food.
B) Dimensional changes in acrylic occur.
C) Alveolar ridges shrink over time.
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) Zinc oxide provisionals should not be used if a permanent restoration is to be cemented with a _____ luting agent.
A) resin
B) glass ionomer
C) zinc phosphate
D) zinc polycarboxylate
Q2) Intracoronal restoration
A)The continuous margin that borders the preparation to which the restoration is fit or finished
B)A restoration that covers all or part of the external surface of the tooth and may extend over the cusp tips on facial or lingual surfaces or include the removal of cusps
C)Provisional restoration made on a cast outside the patient's mouth
D)A restoration within the crown of the tooth,such as an inlay
E)Provisional restoration made directly inside the patient's mouth
Q3) Cement provisionals are most frequently fabricated with which material?
A) Zinc polycarboxylate
B) Zinc oxide eugenol
C) Calcium hydroxide
D) Zinc phosphate
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Page 20
Chapter 19: Preventive and Corrective Oral Appliances
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Sample Questions
Q1) A sleep disorder caused when the muscles that support the soft palate,uvula,and tongue relax and the airway narrows or closes
A)Mouth guard
B)Obstructive sleep apnea
C)Space maintainer
D)Orthodontic tooth aligners
Q2) What is a risk factor for obstructive sleep apnea (OSA)?
A) Obesity
B) Large neck
C) High blood pressure
D) All of the above
Q3) Removable appliances that are designed to gently move teeth into predetermined positions
A)Mouth guard
B)Obstructive sleep apnea
C)Space maintainer
D)Orthodontic tooth aligners
Q4) What instructions would be given to a patient who receives a soft sports or bruxism guard?
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