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EFDA Exam 2025 | Expanded Functions Dental Auxiliary (EFDA)
Examination | Featuring ARE clinical examination (Anterior Composite
Restoration, Posterior Amalgam Restoration, Posterior Composite
Restoration) and ACE Computer-Based Examination | Newest Exam
(Just Released)
What material exhibits good obtundent qualities ---------CORRECT ANSWER---------- -------Zinc oxide eugenol What is the strength of amalgam once placed ---------CORRECT ANSWER-------------- ---6% after 20 minutes The higher the percentage of mercury in amalgam the easier it is to mix and ------- --CORRECT ANSWER-----------------The slower it sets Intercostal position (ICP) or maximum intercuspation is ---------CORRECT ANSWER- ----------------Complete intercuspation of the opposing teeth independent of condylar position When condensing an amalgam restoration it is the goal of the EFDA to --------- CORRECT ANSWER-----------------Slightly overfill the restoration
Subgingival is considered ---------CORRECT ANSWER-----------------0.2mm or greater What can happen if an EFDA fails to condense amalgam into the mechanical retentive features of a restoration ---------CORRECT ANSWER----------------- Weakened retention of the restoration What necessitates replacing an amalgam restoration rather than simply polishing that restoration ---------CORRECT ANSWER-----------------Open contact What must you avoid when finishing proximal areas of the amalgam restoration -- -------CORRECT ANSWER-----------------Damaging the contact area Damage to the soft tissue during placement of restorative material may cause bleeding that can interfere with material causing ---------CORRECT ANSWER--------- --------Improper bonding improper curing Lead to open margins And EFDA may need to place retraction cord so that the resultant restorative material can be placed without contamination from the ---------CORRECT ANSWER-----------------Sulcular fluid Blood
Common astringent hemostatic agents used with retraction cord include --------- CORRECT ANSWER-----------------Ferric sulfate Aluminum sulfate Studies have shown that hemostatic agent effects can last up to_______ after cord has been removed ---------CORRECT ANSWER-----------------20 mins Generally speaking what is the first step in cord placement ---------CORRECT ANSWER-----------------Evaluate the area where the prep is located and gingival tissue In the early_______, New conservative preparation's were developed that include what became known as tunnel and slot cavity designs ---------CORRECT ANSWER--- --------------1990s The ________ preparation was designed to avoid the removal of the marginal ridge and the issues surrounding the proper replacement of the marginal ridge ---- -----CORRECT ANSWER-----------------Tunnel What is the operating zone for the right handed operator relative to the patient's face ---------CORRECT ANSWER----------------- 8 - 12 o'clock zone
Ideally, the distance from operator face to the patient face should be --------- CORRECT ANSWER----------------- 12 - 14 inches When restoring a maxillary tooth best visual access can be obtained with the patient reclined in a supine position. The plane of the maxillary arch is --------- CORRECT ANSWER-----------------Perpendicular to the floor When restoring a mandibular tooth, Best visual access can be obtained with the patient reclined with the back of the chair angled slightly up(30-40 degrees). The plane of the mandibular arch is --------
- CORRECT ANSWER-----------------Parallel to the floor What instruments are used to place amalgams, composite resin's and temporary filling materials into cavity preparation's ---------CORRECT ANSWER----------------- Compactors What instruments are used to remove excess amalgam, composite resin's and temporary materials after the material has been placed in the cavity preparation - --------CORRECT ANSWER-----------------Carvers
A carver should be adapted at a __________ degree angle to the surface being carved. ---------CORRECT ANSWER----------------- 90 What is the function of the index finger in the modified pen grasp ---------CORRECT ANSWER-----------------holds the instrument handle opposite the thumb How does the EFDA accomplish activation (movement) of an instrument in order to avoid muscle cramping and fatigue? ---------CORRECT ANSWER----------------- Moving the hand, wrist and forearm as one unit, keeping a secure fulcrum What are the advantages of working in a dry field? ---------CORRECT ANSWER------- ----------Better visibility, prep stays clean and dry, Materials develop properly and easier access for placement of materials True or false: in a proper operating field the teeth are accessible and dry in the surrounding soft tissues are isolated from the operating site ---------CORRECT ANSWER-----------------True Is the oldest method used for retraction and dryness and are recommended for isolation during short periods ---------CORRECT ANSWER-----------------Cotton rolls
Cotton rules are placed in the vestibule or floor of the mouth adjacent to the operating sites. They will absorb saliva from what salivary ducts ---------CORRECT ANSWER-----------------Parotid and sublingual Disadvantage of cotton roll isolation ---------CORRECT ANSWER-----------------Must be changed frequently, risk of contamination when changing, limited retraction, does not protect patient How many advantages to using rubber dam ---------CORRECT ANSWER----------------
- 6 Dryness ensured during all steps of the cavity preparation and restorative procedure when you use this type of isolation ---------CORRECT ANSWER------------- ----Rubber dam The most common listed disadvantage of using the rubber dam ---------CORRECT ANSWER-----------------Time in placing All rubber dam clamps have this in common ---------CORRECT ANSWER----------------
- Jaw, forcep holes, points, bow
Upon removing a gingival retractor, the EFDA must avoid touching the tooth, and the ______ with the jaws of a retractor ---------CORRECT ANSWER----------------- Finished restoration Which will best retract the gingival tissue when restoring a class V restoration ----- ----CORRECT ANSWER-----------------Gingival retractor Can you re-contour over carved restorations and is this an advantage or a disadvantage of a polished amalgam over unpolished ones ---------CORRECT ANSWER-----------------No, Disadvantage What must you avoid when finishing proximal areas of amalgam restorations ------ ---CORRECT ANSWER-----------------Damaging the contact area What is an open margin ---------CORRECT ANSWER-----------------space between the restoration and the tooth How many increments of amalgam should be placed in all cavity preparations, even the smallest? ---------CORRECT ANSWER-----------------At least two increments.
Step one of placing any type of amalgam is always what ---------CORRECT ANSWER-----------------Examine the prep In the federation dentaire international system for numbering, a permanent maxillary right first molar is: ---------CORRECT ANSWER----------------- 16 Which tooth numbering system does not use letters when describing primary dentition? ---------CORRECT ANSWER-----------------FDI Numbering System On a tooth with extensive gingival recession below the Cementoenamel junction, what would be visible? ---------CORRECT ANSWER-----------------anatomical and clinical crown What is the periodontium? ---------CORRECT ANSWER-----------------The oral hard and soft tissue that supports the teeth When looking into a healthy oral cavity when will most likely see ---------CORRECT ANSWER-----------------The clinical crown
What dental tissue is comprised of tubules that contain protoplasmic extensions of the cells that line the pulp chamber ---------CORRECT ANSWER----------------- dentin Enamel covers the anatomical crown of the tooth. The composition of an enamel is approximately ---------CORRECT ANSWER-----------------95.5% inorganic, 0.5% organic, 4% water Dentin is normally yellowish white and darker than an enamel. The composition of dentin is approximately ---------CORRECT ANSWER-----------------70% inorganic, 20% organic, 10% water What tooth tissue most resembles bone ---------CORRECT ANSWER----------------- cementum Pulp can be harmed by the Carie's process and by ---------CORRECT ANSWER-------- ---------Sterilizing, cleaning, drying, desensitizing agent Where is the oblique ridge located on a maxillary molar? ---------CORRECT ANSWER-----------------DB and ML cusps
Which incisor has the most acute mesioincisal angle (sharp) ---------CORRECT ANSWER-----------------Maxillary central A basic difference between canines and incisors is the ________ that is unique to canines ---------CORRECT ANSWER-----------------Cusp tip What term is used to describe any linear elevation of the surface of a tooth --------
- CORRECT ANSWER-----------------Ridge A union of two triangular ridges produces a single ridge which is called --------- CORRECT ANSWER-----------------transverse ridge What is a marginal ridge ---------CORRECT ANSWER-----------------Rounded border of enamel which forms the mesial and distal margins of anterior and posterior teeth What is the term used to describe broad irregular depressions or concavities on the occlusal and lingual surfaces of anterior and posterior teeth ---------CORRECT ANSWER-----------------Fossae
Can a non certified dental assistant apply to become an EFDA in OH? --------- CORRECT ANSWER-----------------No What individuals can apply to become an efda in the state of Ohio --------- CORRECT ANSWER-----------------A licensed dental hygienist A dentist who graduated from an unaccredited dental school A dental student with the school administrators recommendation EFDAs are required to register with the Ohio state dental board. Applicant for the EFDA registration are required to complete a written application on a form specified by the Dental board and all of the following: ---------CORRECT ANSWER--- --------------Pay a registration fee Show proof of an EFDA course, board approved Show proof passing the EFDA board exam Under what circumstances can an EFDA Be eligible to practice under general supervision in the state of Ohio ---------CORRECT ANSWER-----------------Complete two years and 3000 hours of work experience, Plus a medical emergencies course What is a non-delegable duty for an EFDA in the state of Ohio? ---------CORRECT ANSWER-----------------Permanently cement a porcelain crown
How many EFDAs can one Dentist oversee at a time? ---------CORRECT ANSWER---- ------------- 2 How many hours are needed in the state of Ohio to complete an EFDA course ----- ----CORRECT ANSWER-----------------100 didactic/lab and 80 clinical irremediable tasks and procedures include ---------CORRECT ANSWER----------------- Injection of local anesthetics Direct supervision includes ---------CORRECT ANSWER-----------------Dentist is physically present in the office and the procedures are ordered by the dentist The science that studies the relationship of people to their working environment in order to promote efficiency and reduce stress and strain ---------CORRECT ANSWER-----------------Ergonomics correct body position for an EFDA ---------CORRECT ANSWER-----------------Forearms parallel, feet flat on floor
What best describes the inclusion of a properly placed temporary sedative restoration ---------CORRECT ANSWER-----------------It is slightly out of occlusion Doughnut shaped marks on the occlusal surface of the restoration indicate --------- CORRECT ANSWER-----------------Heavy centric occlusion When restoring excursive contacts the marks left by articulating paper on the restoration should be ---------CORRECT ANSWER-----------------Out of occlusion What is the primary goal of an EFDA and restoring occlusion ---------CORRECT ANSWER-----------------Maintain favorable occlusal relationship and do nothing to alter it what is creep ---------CORRECT ANSWER-----------------Slow movement of material under compressive forces overtime What is the composition of amalgam ---------CORRECT ANSWER----------------- Mercury, silver, tin, copper, zinc
The shapes of alloy particles are ---------CORRECT ANSWER-----------------Lathe and spherical What statement best describes a sealer ---------CORRECT ANSWER----------------- Seals off openings of the cut dentinal tubules to prevent sensitivity Which of the following materials is considered to have sedative qualities Gluma, zinc oxide eugenol, zinc phosphate, calcium hydroxide ---------CORRECT ANSWER-----------------Zinc oxide eugenol If you are restoring tooth 20 which teeth should be isolated with the rubber dam - --------CORRECT ANSWER----------------- 19 - 22 This is the free gingiva that is between adjacent teeth ---------CORRECT ANSWER--- --------------Interproximal papilla The grasp that offers the greatest control ---------CORRECT ANSWER----------------- Modified pen grasp
