EFDA Practice 2024-2025 Questions & Correct Verified Answers (100% Correct). Graded A+, Exams of Nursing

Download EFDA Practice 2024-2025 Questions & Correct Verified Answers (100% Correct). Graded A+ and more Exams Nursing in PDF only on Docsity! EFDA Practice 2024-2025 Questions and Correct Verified Answers (100% Correct). Already Graded A+ ________ are used to condense or adapt amalgams, composite resins, and temporary filling materials into cavity preparations - ANScompactors __________ is the actual movement of the instrument - ANSActivation A _______ is any linear elevation on the surface of a tooth - ANSridge A class V lesion is also thought of as a smooth surface lesion, and can occur on an anterior or posterior tooth; in either a lingual or buccal/facial location - ANSTrue A general guideline to placing a rubber dam is to isolate at least ____ tooth distal, and _____ teeth mesial to the tooth being restored. - ANSone tooth distal, two teeth mesial A pit is - ANSan incomplete closure of the enamel A right handed operator would function best in the ________ position? - ANS8 to 12 o'clock A strong stream of air that can dry the dentin and injure the pulp - ANSdesiccation A term indicating the gradual loss of tooth structure along the biting surface due to occlusal wear - ANSattrition A thin soft tissue that is loosely attached to the underlying bone - ANSalveolar mucosa Acid etch removes the _______ layer prior to resin placement - ANSsmear Amalgam that contains more than ______ mercury is considered to be "mercury-rich" - ANS54% An acceptable thickness of calcium hydroxide is about .5mm - ANSTrue Any material placed as a THICK layer between the restorative material and the dentin may be referred to as a ______. - ANSbase As a general guideline, pins are placed entirely within dentin at a depth of ___ into dentin and extend ___ out of dentin to aid in the retention of the large amalgam - ANS2mm/2mm Bases that are used to protect the pulp from the pressures exerted on it during amalgam placement (condensing) - ANSreinforcers Because of its exothermic (heat releasing) properties, it is necessary to mix Dycal on a cool glass slab - ANSFalse zinc phosphate Because the setting reaction of this product is exothermic, the pulp should be protected by using varnish or a non-irritating liner base between this and the dentin. This product is - ANSzinc phosphate Carious lesions located on the proximal surfaces of anterior teeth that ALSO involve the incisal edge are - ANSClass IV Carious lesions that are located on the GINGIVAL third of the facial and lingual surfaces (smooth surface lesions) of anterior and posterior teeth are - ANSClass V Composite resin that has been modified with glass ionomer components in order to release fluoride - ANScompomers Contact points are found between which teeth? - ANSdistal of central incisors and mesial of lateral incisors Conventional large particle composite resins contain ____ to ____ inorganic filler by weight. - ANS75-80% Coronal to the actual division into two or more roots is a concavity that extends to or nearly to the CEJ. This concavity is called - ANSthe furrow Delegate duties for a certified AND registered EFDA in the state of Ohio include all the basic duties assigned to a BQP. Additional duties include placement of _______ under the direct supervision of a licensed DDS - ANSmetallic restorations, non-metallic restorations, and sealants Dental sealants can either be - ANSchemical or light cured During the etching process the gel or liquid is placed in what manner to prepare the enamel and dentin for accepting the bonding agent? - ANSenamel first for 15 sec then add to dentin for 15 sec, for a total of 30 sec Enamel composition includes - ANS95% inorganic matter, 5% organic matter and water Enamel conditioning contains approximately _____ phosphoric acid - ANS32-40% Erosion is thought to be due to a chemical process - ANSTrue Movement thrusting the lower jaw forward is: - ANSprotrusive On a large complex amalgam restoration, what is the rule for placing a pin? - ANSone pin for each missing cusp replaced Once a CDA has taken a board approved sealant course, how many sealants must her/his DDS personally supervise before he/she is permitted to apply sealants under direct supervision? - ANSsix One basic function of ________ is to protect the pulp from the pressures exerted on the tooth during amalgam condensing - ANSreinforcers point angle - ANSthree walls Position the facial jaw of the rubber dam ____ mm gingival to the proposed gingival margin of the preparation? - ANS.5 to 1 mm Put the FOUR materials in the body in order from hardest to softest - ANSenamel, dentin, bone, cementum Recent data indicates that approximately ___% of the caries in the permanent teeth of children occur in pits and fissures - ANS90% Refers to general contouring with various instruments to achieve the desired overall anatomy - ANSfinishing Retention between tooth and bonding agent - ANSmechanical Seat the patient _____ for the final occlusion check. - ANSupright T or F Longer curing times are needed for opaque and dark shades of composite - ANSTrue T or F Since old restorations have undergone some degree of tarnish and corrosion, they will take longer to finish and will not have the same smooth, shiny surface that a new restoration will have after polishing - ANSTrue T or F The average etch time for primary teeth is usually LONGER than that for permanent teeth - ANSTrue T or F Cotton rolls should be adjacent to the parotid and sublingual gland ducts to absorb the flow of saliva coming from these ducts - ANSTrue T or F Evidence suggests that polishing of high-copper amalgams is unnecessary - ANSTrue T or F The advantage of a cotton roll holder is that the cheek and tongue are SLIGHTLY retracted thus giving better visibility - ANSTrue T or F Undue stress continually placed on the body can contribute to lower back pain, circulatory problems, muscle aches, and tension - ANSTrue Teeth are identified by their location and name. Give the order in which they are named - ANSArch, quadrant, name The air inhibited layer provides a chemical bond between filled and unfilled resins - ANSTrue The area where the roots divide - ANSfurcation The back of the patient chair is raised until its angle to the floor is ______ degrees - ANS25-45 The bow of the clamp should be positioned _______ and ________ to the clamped tooth - ANSdistal, occlusal The box shaped area at the lower end of the retainer that has an opening for the threaded spindle to move in and out is called - ANSvice The bulk of the tooth is made up of - ANSdentin The chair is raised or lowered to achieve ____ to ____ inches distance between the patient's face and the operator's face - ANS12 to 14 The combination of ________ and ________ results in what is called the Gamma 2 phase - ANStin and mercury The combination of dentin and polymer is called - ANShybrid layer The combination of tin and mercury results in - ANSGamma 2 phase The complete intercuspation of the opposing teeth independent of condylar position - ANSintercuspal position (ICP)/maximum intercuspation (MIP) The compressive strength of an amalgam 20 minutes after placement is only _____ of the strength it will have at the end of one week - ANS6% The correct sequence of placement for a near pulp exposure is - ANScalcium hydroxide, ZOE, varnish The Cusp of Carabelli is found where? - ANSmaxillary first molars, lingual cusp The enamel is thickest at the incisal third causing it to be ______ translucent than the rest of the tooth - ANSmore The flat, smooth working end of a condenser is referred to as - ANSthe nib The FOUR basic principles of instrument use - ANSgrasp, finger rest, adaption, activation The gingival third is the ______ area of the tooth - ANSdarkest The junction of THREE walls within a cavity prep is - ANSa point angle The layer that is made up of loosely bonded gel-like mixture of organic and inorganic dentinal cutting debris, salivary proteins, intra-oral bacteria and assorted plaque debris is called the - ANSsmear layer The mandibular 1st molar is unique because of a small 5th cusp called: - ANSdistal The movement of fluids between the margin of the restoration and tooth structure is called - ANSpercolation The movement of the instrument - ANSactivation The part of the rubber dam clamp that is expanded to fit over a tooth - ANSjaw The percentage of LOW copper in amalgam - ANSless than 9% The percentage of silver in amalgam - ANS41-71% The point of support or rest from which the hand moves to activate the instrument and obtain the best position or adaption - ANSfinger rest or fulcrum The point or area where approximating teeth in the same arch touch or meet each other is referred to as the ________. - ANScontact area The portion of the free gingiva located in interproximal areas - ANSinterdental papilla What are dental sealants made of? - ANSBisphenol A and Glycidylmethacrylate (BIS-GMA) What are known as the OLDEST method used for retraction and dryness and are recommended for isolation during SHORT procedures? - ANScotton rolls What are POOR conductors of heat, and are therefore the natural protectors of the pulp? - ANSenamel and dentin What are referred to as bases AND are placed to insulate the pulp from thermal irritation? - ANSinsulators What are the filler particles coated with to achieve a bond between the resin matrix and the inorganic filler of composite resins? - ANSepoxy silane coupling agent What are the FOUR embrasures? - ANS-incisal/occlusal -facial/buccal -lingual -gingival What are the ONLY teeth that have an oblique ridge? - ANSmaxillary molars What are the TWO types of alloy particles? - ANSlathe and spherical cut What are used in deep cavity preps where the remaining layer of dentin over the pulp is very thin in order to STIMULATE a thickening of the dentin layer? - ANSstimulators What are used to protect the pulp or to aid in its recovery? - ANSbases and liners What can be used to eliminate submarginal areas of less than 0.2 mm? - ANSa tapered white stone What CANNOT be placed under composite restorations? - ANScopal varnish and ZOE What cells form enamel? - ANSameloblasts What clamp allows the rubber dam to be attached to it prior to placement? - ANSwinged What class of carious lesions is located on the proximal surfaces of centrals, laterals, and canines but does NOT involve the incisal edge? - ANSClass III What combines easily with mercury? - ANSsilver What do we call the depression that provides an escape for food during mastication? - ANSspillway What embrasure is usually the largest and is best suited for wedge placement? - ANSlingual What function to SEAL off the cavity preparation, basically reducing the diffusion of chemicals/bacteria into the dentin? - ANSsealers What grasp offers the GREATEST control of instrumentation during dental procedures in the oral cavity? - ANSmodified pen grasp What has the ability to SOOTHE the sensitive pulp or reduce the irritability of a pulp? - ANSobtundents What has the HIGHEST fluoride content of all the materialized tissue? - ANScementum What instrument is used to remove excess amalgam, composite resin and temporary filling materials from the prep and to contour the materials so they blend in with the remaining tooth structure? - ANScarvers What instruments can be used to invert the rubber dam? - ANST-ball burnisher or a blunt shaped instrument What is a pathologic wearing away of tooth structure by friction and is often associated with faulty or overzealous tooth brushing techniques? - ANSabrasion What is believed to be due to a chemical process? - ANSerosion What is formed from the junction of TWO walls within a cavity prep, or of one wall and the cavosurface margin? - ANSa line angle What is it specifically that brings mercury to the surface during the finishing process, and causes a dull surface that is more susceptible to corrosion? - ANSheat What is known as a continuation of primary dentin? - ANSsecondary dentin What is known as allowing oral fluids to enter at the restoration/tooth structure margin? - ANSpercolation What is known as the "sandwich" technique? - ANSglass ionomer UNDER composite What is NOT a characteristic of glass ionomer? - ANScauses extreme sensitivity to cold or hot What is one duty that a registered EFDA cannot perform under the direct supervision of a licensed dentist? - ANSapply fluoride varnish What is the advantage to using WINGED clamps? - ANSallows dam to be attached to the clamp prior to placing it on the tooth What is the amount of enamel that can be removed with the white stone in the process of finishing? More than this amount and the restoration must be replaced - ANS.2mm What is the composition of dentin? - ANS70% inorganic, 20% organic, 10% water What is the composition of enamel? - ANS95% inorganic matter, 5% organic matter and water What is the FIRST step for placing composite restorations? - ANSclean off the tooth What is the free gingiva that is located interproximally called? - ANSinterdental papilla What is the HARDEST tissue in the body? - ANSenamel What is the key to stabilization of the rubber dam? - ANSclamp What is the MAIN component of amalgam? - ANSsilver What is the MAJOR source of contamination contributing to sealant failure? - ANSsaliva What is the makeup of inorganic filler in a conventional composite resin? - ANS75-80% What is the part of the clamp that expands to fit over a tooth? - ANSjaw What is the percentage of copper in a low and high (in that order) copper alloy? - ANS<9% low/12-30% high What is the percentage of HIGH copper in amalgam? - ANS12-30% What is the percentage of tin in amalgam? - ANS15-30% What is the percentage of zinc in amalgam? - ANS0-1% What is the primary goal of operative dentistry? - ANSto remove diseased tissue and replace it while reestablishing proper dental anatomy and function What is the reason for etching dentin? - ANSto improve the micromechanical retention by removing the smear layer What is the SECOND hardest material in the body? - ANSdentin What is the visible portion of the anatomical crown known as? - ANSthe clinical crown