Dental Quiz PDF
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This document is a dental quiz with multiple-choice questions covering various aspects of dental health and care. It includes questions on periodontal disease, dental caries, and more.
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Calculus ____________ be removed by brushing and other plaque control methods. Hide answer choices Can Correct: Cannot Correct answer Question 21/1 The primary cause of gingivitis and most forms of periodontal disease is: Hide answer choices calculus. de...
Calculus ____________ be removed by brushing and other plaque control methods. Hide answer choices Can Correct: Cannot Correct answer Question 21/1 The primary cause of gingivitis and most forms of periodontal disease is: Hide answer choices calculus. defective restorations. food debris. Correct: biofilm. Correct answer Question 31/1 Those structures that surround, support, and are attached to the teeth are called the: Hide answer choices periodontitis. Correct: periodontium. Correct answer Both A and B. None of the answers are correct. Question 41/1 Which of the following is/are implicated in causing periodontal diseases? Hide answer choices Plaque Malocclusions Systemic causes Certain medications Correct: All of the options. Correct answer Question 51/1 Gingivitis is not characterized by: Hide answer choices areas of redness. areas of swelling. a tendency for the gingiva to bleed easily. Correct: loss of bone. Correct answer Question 61/1 Which of the following is a sign or symptom of periodontal disease? Hide answer choices Bleeding gingiva while brushing or flossing Loose or separating teeth Pain or pressure when chewing Pus around the teeth or gingiva Correct: All of the options Correct answer Question 71/1 Tooth structure considered as a structure of the periodontium is: Hide answer choices enamel. dentin. Correct: cementum. Correct answer All of the options. Question 81/1 A description of healthy gingiva could include all of the following EXCEPT: Hide answer choices uniformly pale pink. generalized dark brown pigmentation. firm. resilient. Correct: All of the options. Correct answer Question 91/1 The probing depth of a healthy gingival sulcus is: Hide answer choices Correct: 0 to 4 mm from the cementoenamel junction. Correct answer 3 to 4 mm from the cementoenamel junction. 0 to 4 mm from the dentinoenamel junction. 3 to 4 mm from the dentinoenamel junction. Question 101/1 Bright red gingiva that bleeds on probing is a description of: Hide answer choices periodontitis. periodontitis with gingivitis. Correct: gingival inflammation. Correct answer plaque. Question 111/1 All of the following are currently known risk factors for periodontal disease EXCEPT: Hide answer choices smoking. diabetes. Correct: fibromyalgia. Correct answer stress. Question 121/1 A gingival infection characterized by sudden onset of pain, crater-shaped interdental papillae, bleeding, and a foul odor is a description of: Hide answer choices chronic periodontitis. aggressive periodontitis. Correct: necrotizing periodontal disease. Correct answer plaque-induced gingivitis. Question 131/1 The outermost structure of the periodontium is: Hide answer choices alveolar bone. cementum. Correct: gingiva. Correct answer epithelial attachment. Question 141/1 Approximately _______% of the adult U.S. population have some form of periodontal disease. Hide answer choices 35 55 Correct: 75 Correct answer 90 Question 151/1 Periodontal diseases are infectious diseases and are the leading cause of tooth loss in adults. Hide answer choices Correct: True Correct answer False Question 161/1 Improved daily oral hygiene practices will reverse gingivitis. Hide answer choices Correct: True Correct answer False Question 171/1 All forms of periodontal diseases are related to changes in the types of bacteria in the oral cavity. Hide answer choices Correct: True Correct answer False Question 181/1 Localized and generalized are two general groups of early-onset periodontitis. Hide answer choices Correct: True Correct answer False Question 191/1 Gingivitis is curable and improved brushing and flossing is an effective way of reversing gingivitis. Hide answer choices Correct: True Correct answer False Question 201/1 Patients with periodontal disease have a greater incidence of coronary heart disease. Hide answer choices Correct: True Correct answer False An evidence-based strategy for preventative and reparative care for early dental caries used to assess the caries risk to individuals. Hide answer choices Correct: CAMBRA Correct answer Periodontal risk assessment Dental examination Cavitation risk evaluation Question 21/1 During remineralization ____________, found in saliva, work together to replace some of the minerals that have been lost. Hide answer choices Calcium and fluoride Correct: Calcium, fluoride, and phosphate Correct answer Iron, fluoride, and phosphate None of the options; fluorides work alone. Question 31/1 Loss of minerals from the tooth surface is called: Hide answer choices cavitation. incipient caries. Correct: demineralization. Correct answer remineralization. Question 41/1 Decay that develops rapidly and is widespread throughout the mouth is: Hide answer choices cavitation. incipient caries. Correct: rampant caries. Correct answer xerostomia. Question 51/1 Which types of bacteria are primarily responsible for dental caries? Hide answer choices Mutans streptococci Lactobacilli Candidiasis Correct: Both A and B Correct answer Question 61/1 The most highly mineralized tissue in the body is: Hide answer choices bone. dentin. Correct: enamel. Correct answer cementum. Question 71/1 The earliest stage of dental caries is: Hide answer choices cavitation. Correct: incipient. Correct answer frank. rampant. Question 81/1 Dental caries is a(n): Hide answer choices communicable disease. infectious disease. disease reported in history. untreated disease in children with a higher prevalence rate than asthma. Correct: all of the options. Correct answer Question 91/1 Colonies of bacteria embedded in an adhesive layer are called: Hide answer choices Correct: plaque. Correct answer pellicle. mutans streptococci. all of the options Question 101/1 Early childhood caries is: Hide answer choices preventable. transmissible. more common among children with special needs. Correct: all of the options. Correct answer Question 111/1 The term for dental caries that occurs under or adjacent to existing restorations is: Hide answer choices rampant. Correct: recurrent. Correct answer incipient. cavitated. Question 121/1 Prevention of dental caries includes: Hide answer choices the use of fluoride. an antimicrobial oral rinse. decreasing fermentable carbohydrates in the diet. increasing salivary flow. Correct: all of the options. Correct answer Question 131/1 When the number of caries causing bacteria in the mouth increases, the risk for developing dental caries also increases. Hide answer choices Correct: True Correct answer False Question 141/1 The oral cavity of newborn children does not contain any mutans streptococci. Hide answer choices Correct: True Correct answer False Question 151/1 Mutans streptococci are transmitted through saliva, most commonly the mother’s, to the infant. Hide answer choices Correct: True Correct answer False The only nutrients that can make new cells and rebuild body tissues are: Hide answer choices carbohydrates. fats. minerals. Correct: proteins. Correct answer Question 21/1 Only energy and no other nutrients are provided by: Hide answer choices carbohydrates. proteins. Correct: empty calories. Correct answer fat. Question 31/1 Sticky sugary refined products are ____________ cariogenic than/as complex carbohydrates. Hide answer choices less Correct: more Correct answer equally as Question 41/1 Tooth erosion is often seen in patients with: Hide answer choices Correct: a history of bulimia. Correct answer habits such as thumb sucking. cleft palates. all of the options. Question 51/1 Oral manifestations of bulimia include: Hide answer choices Correct: decalcification of enamel. Correct answer increased caries. reduced health of the periodontal tissues. all of the options. Question 61/1 The recommendation is that cholesterol be limited to less than: Hide answer choices 100 mg/day. Correct: 250 mg/day. Correct answer 500 mg/day. 1000 mg/day. Question 71/1 Which food group is at the bottom of the food pyramid? Hide answer choices Fats Sweets Meats Correct: Grains Correct answer Question 81/1 Which antioxidant vitamin can help prevent cholesterol from oxidizing and damaging the arteries? Hide answer choices Vitamin A Vitamin C Vitamin E Correct: Vitamins C and E. Correct answer Question 91/1 Dietary fiber is also called: Hide answer choices simple carbohydrate. complex carbohydrate. Correct: roughage. Correct answer empty calories. Question 101/1 Which of the following foods are considered to be cariogenic? Hide answer choices Raisins Crackers Soft drinks Correct: All of the options Correct answer Question 111/1 Compounds in proteins used by the body to build and repair tissue are: Hide answer choices Correct: amino acids. Correct answer fats. carbohydrates. vitamin B6. Question 121/1 The role of the dental assistant in nutritional counseling includes: Hide answer choices Counseling patients about the prevention of tooth decay. Counseling patients in orthodontic appliances about food choices. Presurgical counseling regarding postsurgical food choices. Correct: All of the options. Correct answer Question 131/1 Five categories of major nutrients are: Hide answer choices carbohydrates, proteins, cholesterol, vitamins, and minerals. Correct: minerals, vitamins, fats, proteins, and carbohydrates. Correct answer vitamins, minerals, fat-soluble vitamins, carbohydrates, and proteins. grains, vegetables, fruits, milk, and beans. Question 141/1 A well-balanced mixture of all eight essential amino acids is the definition of a(n): Hide answer choices complex carbohydrate. antioxidant. organic food. Correct: complete protein. Correct answer Question 151/1 Swollen and bleeding gums, slow wound healing, fatigue, depression, and poor digestion can be the result of: Hide answer choices vitamin B deficiency. Correct: vitamin C deficiency. Correct answer vitamin K deficiency. folic acid deficiency. Question 161/1 All of the following statements are true regarding nutrition EXCEPT: Hide answer choices humans can live longer without food than without water. vitamins occur in plant and animal tissues. the antioxidants in vitamins E and C can prevent cholesterol from oxidizing and damaging arteries. Correct: a healthy diet should be made up of no less than 40% fat. Correct answer Question 171/1 A major factor in determining the cariogenicity of a carbohydrate is: Hide answer choices the sugar content. how much of the carbohydrate is eaten? Correct: how long it stays in the mouth? Correct answer how much saliva is required to clear the acid it produces? Question 181/1 A good source for vitamin D is: Hide answer choices sunlight. fish. butter. Correct: all of the options. Correct answer Question 191/1 Saliva flow serves which of the following functions. Hide answer choices Speeds the clearance of food from the mouth. Delivers fluoride to the teeth. Aids in remineralization of the teeth. Correct: All of the options. Correct answer Question 201/1 As long as a food was grown without the use of pesticides, it can be considered organic. Hide answer choices True Correct: False Question 11/1 A localized collection of pus is a(n): Hide answer choices cyst. lesion. Correct: abscess. Correct answer blister. Question 21/1 A closed sac or pouch lined with epithelium and containing fluid or semisolid material is a(n): Hide answer choices Correct: cyst. Correct answer lesion. abscess. blister. Question 31/1 A bony overgrowth in the midline of the hard palate is a: Hide answer choices torus mandibularis. micrognathia. Correct: torus palatinus. Correct answer none of the options. Question 41/1 Tooth erosion is often seen in patients with: Hide answer choices Correct: a history of bulimia. Correct answer habits such as thumb sucking. cleft palates. all of the options. Question 51/1 The candidiasis infection is caused by: Hide answer choices a virus. bacteria. fungus. yeast. Correct: fungus and yeast. Correct answer Question 61/1 Another term for a canker sore is: Hide answer choices Correct: aphthous ulcer. Correct answer cellulitis. leukoplakia. Kaposi’s sarcoma. Question 71/1 Early oral signs of leukemia do not include: Hide answer choices gingival hemorrhage. Correct: very pale gingival color. Correct answer gingivae of a spongy texture. enlargement of the gingivae. Question 81/1 What is the term for dry mouth? Hide answer choices Halitosis Candidiasis Correct: Xerostomia Correct answer Mucositis Question 91/1 The technical term for bruising is: Hide answer choices Correct: ecchymosis. Correct answer cellulitis. leukoplakia. abscess. Question 101/1 The general term used to describe inflammation and changes in the topography of the tongue is: Hide answer choices fissured tongue. pernicious anemia. Correct: glossitis. Correct answer black hairy tongue. Question 111/1 A malignant tumor involving the bone is called: Hide answer choices carcinoma. adenocarcinoma. Correct: sarcoma. Correct answer osteosarcoma. Question 121/1 A swelling or a mass of blood collected in one area or organ is the definition of: Hide answer choices Correct: hematoma. Correct answer lymphoma. petechiae. sarcoma. Question 131/1 Small, pinpoint red spots on the skin or mucous membrane are: Hide answer choices Correct: petechiae. Correct answer cellulitis. candidiasis. acute inflammation. Question 141/1 All of the following are examples of lesions that extend below the mucosal surface EXCEPT: Hide answer choices erosion. Correct: hematoma. Correct answer abscess. cyst. Question 151/1 Known teratogens involved in congenital malformations include: Hide answer choices drugs. chemicals. infections. radiation. Correct: all of the options. Correct answer Question 161/1 A condition characterized by an abnormally large jaw is: Hide answer choices macrodontia. acromegaly. Correct: macrognathia. Correct answer exostosis. Question 171/1 A divided tooth bud that develops into an extra tooth is called: Hide answer choices germination. Correct: twinning. Correct answer fusion. dens in dente. Question 181/1 Ankylosis: Hide answer choices affects only primary teeth. fuses bone to cementum and dentin. affects mostly molars. Correct: all of the options. Correct answer Question 191/1 Classic signs of inflammation include: Hide answer choices Correct: pain, redness, swelling, and heat. Correct answer pain, swelling, redness, and pus. swelling, redness, heat, and mucus. mucus, pus, redness, and pain. Question 201/1 Which of the following can affect the developing teeth in utero? Hide answer choices Maternal fevers Antibiotics Maternal drug abuse Correct: All of the options Correct answer Question 211/1 Lichen planus is a malignant condition. Hide answer choices True Correct: False Correct answer Question 221/1 Early stages of oral cancer are usually painful. Hide answer choices True Correct: False Correct answer Question 231/1 Radiation treatment for head and neck cancer has no effect on the salivary glands, blood vessels, and bones of the jaws. Hide answer choices True Correct: False Correct answer Question 241/1 Candidiasis is often an early indication of progression from HIV positive to AIDS status. Hide answer choices Correct: True Correct answer False Question 251/1 Cancers of the pharynx, larynx, and esophagus occur 400 to 500 times more frequently among users of smokeless tobacco. Hide answer choices Correct: True Correct answer False Question 11/1 The small shock that is created when two dissimilar metals touch in the mouth is known as: Hide answer choices deformation. Correct: galvanic action. Correct answer microleakage. thermal conduction. Question 21/1 Crushing pressure that pushes a material together is applied by: Hide answer choices Correct: compressive stress. Correct answer elastic stress. shear stress. tensile stress. Question 31/1 The amalgam capsule is reassembled immediately after use to: Show answer choices Question 41/1 The most common noble metals used for crowns and bridges are: Hide answer choices gold and silver. gold, palladium, and silver. Correct: gold, palladium, and platinum. Correct answer gold, platinum, and silver. Question 51/1 The most common type of ceramic used in dentistry is: Hide answer choices gold. plaster. composite. Correct: porcelain. Correct answer Question 61/1 The gold alloy used for cast-removable partial dentures is: Hide answer choices Correct: extra hard, type IV. Correct answer soft, type I. medium, type II. hard, type III. Question 71/1 Amalgam is condensed to: Hide answer choices aid in removing any excess mercury. break up air bubbles in the mix. compact the material tightly into the preparation. Correct: compact the material tightly and remove excess mercury. Correct answer Question 81/1 When working with light-cured composites, the darker the shade of the material, the _______ the curing time will be. Hide answer choices Correct: longer Correct answer shorter Question 91/1 Immediately after trituration, amalgam is: Hide answer choices ready to be light cured. Correct: soft and easily shaped. Correct answer sticky and will adhere to the tooth. very strong The type of base placed to soothe pulp that has been irritated by decay, injury, or trauma from a cavity preparation is: Show answer choices insulating. intermediate. sedative. temporary. Question 21/1 To prepare a tooth surface for adhesion of material to tooth structure, the dentist may select ____________ for the tooth preparation. Show answer choices calcium hydroxide cavity varnish a conditioner/etchant a bonding agent Question 31/1 What is used to mix the calcium hydroxide cavity liner? Show answer choices A ball-shaped applicator An explorer A spatula both a ball-shaped applicator and a spatula Question 41/1 Cavity varnish is placed _____ the liner or insulating base. Show answer choices over under Question 51/1 What can be used under all types of restorative materials? Show answer choices Calcium hydroxide Copal varnish Zinc oxide-eugenol All of the options Question 61/1 Before dentin bonding, the smear layer must be: Show answer choices desiccated. etched. removed. sealed. Question 71/1 Bonding system materials: Show answer choices can be used interchangeably. consist of a liquid and a paste. must be used according to the manufacturer’s instructions. all of the options Question 81/1 What substance can be used as an acid etchant? Show answer choices Maleic acid Phosphoric acid All of the options None of the options Question 91/1 Some types of pulpal stimuli include: Show answer choices physical. mechanical. chemical/biological. All of the options. Question 101/1 In all states it is legal for the expanded-functions dental assistant to apply etchant and place bonding material. Show answer choices True False Which cement(s) is (are) versatile and least irritating to the pulp? (Select all that apply.) Hide answer choices Polycarboxylate cement Correct: Glass ionomer cement Correct answer Zinc phosphate cement Composite resin cement Correct: Zinc oxide–eugenol cement Correct answer Feedback ZOE cement is versatile and least irritating to pulp tissue. Glass ionomer cement is one of the most versatile and least irritating to pulp tissue; therefore, this answer is correct. Composite resin cement is not as easy to use because the tooth surface must be free of plaque and the surface must be etched prior to bonding. This can be irritating to the pulp. Zinc phosphate cement has an acidic pH, which is irritating to the pulp. Polycarboxylate cement has an acidic pH, which is irritating to the pulp. Question 21/1 Which type of dental cement is used as an adhesive for permanent indirect restorations? Hide answer choices Temporary Correct: Luting Correct answer Provisional Liner Feedback Type I luting cements are used to retain permanent indirect restorations. Temporary or type II cements are intended for short-term use as direct restorations. Provisional cements, also luting consistency, are used to retain temporary crowns. A liner is classified as a type III cement. Question 31/1 When are temporary cements used? Hide answer choices Cementing veneers Correct: Placing a provisional crown Correct answer Cementing cast restorations Restoring teeth Feedback Temporary cements are used when the dentist will need to remove the restoration at a later time. Cementing veneers require use of permanent cement. Long-term cements are used when the dentist is cementing cast restorations. Lining and base cements are used in deeper cavity preparations when the dentist restores teeth with direct restorations. Question 41/1 What would occur if there were a delay between mixing a luting material and placing the indirect restoration? Hide answer choices Decreased viscosity Correct: Initial set begins Correct answer Improved thermal properties Improved wettability Feedback A delay between completion of the mix and seating for final cementation will result in an initial setting process, and the casting may not seat completely. When a mix is completed, the viscosity of a material will increase, keeping a restoration from seating properly. A delay will not improve the thermal properties of the material. As viscosity increases, the ability to properly wet the surface will decrease. Question 51/1 Which cement that gives off an exothermic reaction and must be spatulated over a wide area on a cool, dry, thick glass slab? Hide answer choices Zinc oxide–eugenol Polycarboxylate Correct: Zinc phosphate Correct answer Composite resin Feedback Zinc phosphate cement gives off an exothermic reaction and must be spatulated over a wide area of a cool, dry, thick glass slab to dissipate the heat. Zinc oxide–eugenol cements do not give off heat and are mixed on a poly pad. Polycarboxylate cements do not give off heat and are mixed on a poly pad. Resin cements do not give off heat and are mixed on a poly pad. Question 61/1 How should cement be placed into an indirect restoration for delivery? Hide answer choices Fill casting until it is overflowing. Correct: Add a thin lining to cover all internal walls of the casting. Correct answer Fill to the top margin of the crown. Add a thin layer on the very bottom of the crown. Feedback The cement should be loaded so that it covers all the internal walls with a thin lining of cement. Too much cement in the casting will make it more difficult for the dentist to grasp, and the excess cement will spill out of the casting and make cleanup more difficult. Cement must cover all internal walls of the casting to ensure a good seal. Question 71/1 Which type of glass ionomer cement is designed for cementation of indirect restorations? Hide answer choices Correct: I Correct answer II III IV Feedback Type I glass ionomer cement is for the cementation of metal restorations and direct-bonded orthodontic brackets. Type II glass ionomer cement is designed for restoring areas of erosion near the gingiva. Type III glass ionomer cement is used for liners and dentin bonding agents. Type IV glass ionomer cement does not exist. Question 81/1 Which type of cement is preferred for cementation of ceramic veneers? Hide answer choices Zinc phosphate Polycarboxylate Glass ionomer Correct: Composite resin Correct answer Feedback Composite resin cement has been designed especially for cementation of ceramic or porcelain inlays and onlays, crowns and bridges, ceramic veneers. Zinc phosphate cement is used to cement cast restorations and stainless steel crowns. Polycarboxylate cement is used to cement cast restorations and stainless steel crowns. Glass ionomer cement contains a fluoride ion. Question 91/1 When composite resin cement is used, how should the tooth surface be prepared? Hide answer choices Two thin layers of cavity varnish Correct: Etched or treated with a bonding system Correct answer Sprayed with water before cementation Prepared with a micro-etcher with aluminum oxide particles Feedback Having a tooth free of debris is a requirement of composite resin cement. Teeth should be etched and treated with a bonding system before cementation. The surface is to be moist, not wet or completely dry. Question 101/1 Which item listed would not use luting cement for placement? Hide answer choices Laminate veneers Orthodontic fixed appliances Correct: Direct provisional restorations Correct answer Indirect restorations Feedback ZOE cements are used for direct provisional restorations and will need to be removed in a short period of time. Permanent luting cements are used for cementation of laminate veneers, orthodontic fixed appliances, or cast restorations. Question 111/1 Which statement best represents the dental assistant’s priority when preparing dental cements? Hide answer choices Work quickly. Mix in all powder at once. Correct: Follow the manufacturer’s instructions. Correct answer Change ratios depending on temperature. Feedback It is important to mix the material by the manufacturer’s instructions. Each material will have a specific mixing time and method for mixing. Changing ratios of powder and liquid is not recommended. Question 121/1 When working with dental cements, which statement is incorrect regarding minimizing water loss through evaporation? Hide answer choices Dispense powder first and then liquid. Correct: Dispense the liquid first and then powder. Correct answer Dispense liquid when it is time to mix the cement. Keep the lid on the liquid when not in use. Feedback Dispensing the liquid first and then powder when it is time to mix the cement will not minimize water loss. Dispensing powder first, then liquid, will help to minimize water loss. Dispensing the liquid when it is time to mix the cement will minimize water loss. Keeping the lid on the bottle of liquid until it is time to mix the cement will minimize water loss. Question 131/1 What step(s) should be followed before dispensing cement powder? Hide answer choices Pack the powder. Correct: Fluff and measure the powder. Correct answer Stir the powder. Place the bottle of powder on the vibrating table in the laboratory. Feedback When dispensing, most cement powder should be fluffed and measured, but not packed, before dispensing. Question 141/1 Which cement inhibits recurrent decay? Hide answer choices Zinc phosphate Correct: Glass ionomer Correct answer Zinc oxide–eugenol Composite resin Feedback Glass ionomer cement powder contains fluoride, which is slowly released and assists in inhibiting recurrent caries. Zinc phosphate is used to cement permanent indirect restorations. ZOE cements provide a sedative effect. Resin-based cements are used with permanent indirect restorations. Question 151/1 How should glass ionomer cement be mixed to increase the working time? Hide answer choices Quickly Slowly Correct: On a glass slab Correct answer On a paper pad Feedback To increase the working time of glass ionomer, it can be mixed on a glass slab. Mixing the material quickly, slowly, or on a paper pad will not increase the working time of glass ionomer. Question 161/1 Which factor is not an advantage of using glass ionomer in premeasured capsules? Hide answer choices Consistent results can be produced. They can be triturated to eliminate mixing. They are more convenient. Correct: Results can vary. Correct answer Feedback Using glass ionomer in premeasured capsules gives more consistent results, eliminates hand mixing through trituration, and is more convenient. Question 171/1 What type of cement is frequently used to cement ceramic inlays and onlays? Hide answer choices Correct: Type I zinc oxide–eugenol cement Correct answer Type II zinc oxide–eugenol cement Composite resin cement Glass ionomer cement Feedback Type I ZOE is frequently used for cementing provisional coverage. Type II ZOE is reinforced and may be used for final cementation of cast restorations. Composite resin cement is used for final cementation of porcelain inlays, onlays, crowns, and bridges. Type I glass ionomer cement is a luting cement used for cementation of indirect restorations. Question 181/1 Which method would not be used to remove excess cement from an indirect restoration? Hide answer choices Use an explorer. Use a firm fulcrum. Move instruments in a horizontal direction. Correct: Pull excess cement down away from the casting. Correct answer Feedback Pulling excess cement down away from the casting will stretch or weaken the material under the margins. Use an explorer when removing cement from an indirect restoration. When removing cement from an indirect restoration, establish a firm fulcrum. When removing cement from an indirect restoration, move the instrument in a horizontal direction. Question 191/1 Which statement is incorrect as it relates to preparing a tooth for a composite restoration? Hide answer choices Rinse for 30 seconds. Etch enamel and dentin for 15 seconds. Dentin should be slightly moist. Correct: Dry the enamel and dentin completely. Correct answer Feedback The dentin should not be dried completely to avoid desiccation. Enamel and dentin are rinsed approximately 30 seconds to remove all etch material. Enamel and dentin are etched for 15 seconds. Dentin should be blotted dry with a cotton pellet to avoid desiccation. Question 201/1 How should the interior of a porcelain crown be treated before cementation? Hide answer choices Correct: Roughened using air abrasion Correct answer Cleaned with pumice Moistened Polished Feedback Before cementation, the internal surface of a porcelain crown is roughened using air abrasion. Cleaning the porcelain with pumice can pit the porcelain. The interior of the crown should be dry before lining with cement. The interior of a porcelain crown does not need to be polished. Question 211/1 How should polycarboxylate cement appear when mixed correctly? Hide answer choices Stringy Correct: Glossy Correct answer Powdery Weblike Feedback Polycarboxylate cement mix should appear glossy. Polycarboxylate cement is starting to set if it appears stringy or weblike. The cement layer becomes too thick at this time. A powdery mix is not properly mixed. Question 221/1 Which technique will help to dissipate heat when mixing zinc phosphate cement? Hide answer choices Correct: Mixing on a cool glass slab Correct answer Placing a piece of ice in the powder Spatulating over a small area of the slab Mixing the entire amount of powder and liquid in one large increment Feedback Mix the cement slowly over a large area of a cool glass slab to dissipate heat. The powder should be divided into small increments according to the manufacturer’s instructions. Question 231/1 Which of the following is the correct cementing consistency for zinc phosphate cement? Hide answer choices Thin and runny Correct: Stringy, breaking about 1 inch from the slab Correct answer Slightly tacky Firm and forming a ball Feedback The cement should become stringy and break about 1 inch from the slab. Thin and runny cement will be weak. If the material is tacky, it has already begun its setting reaction. Zinc phosphate cement mixed to a ball is used as an insulator in a preparation. Question 241/1 Which cement is the most acidic and irritating to the pulp? Hide answer choices Correct: Zinc phosphate Correct answer ZOE Composite resin Glass ionomer Feedback Zinc phosphate cement contains phosphoric acid and is irritating to the pulp. ZOE is not irritating but rather soothing. Composite resin is not as irritating as zinc phosphate. Glass ionomer is neutral to pulpal tissue. Question 251/1 If used as a base, zinc phosphate requires the use of a liner first. Hide answer choices Correct: True Correct answer False
