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CDC 4Y051 EXAM QUESTIONS WITH 100% ACCURATE
SOLUTIONS
Which type of dental pliers do you use to contour crowns, fit bands, and have beaks that are shaped similar to a ball and socket? -- Answer โโ # What dental device recreates the normal movement of a patient's jaw during the fabrications of the prosthesis? -- Answer โโ Articulator In prosthodontics, when fabricating custom impression trays, custom tray tissue stops are used to -- Answer โโ Provide room for a controlled thickness of impression materials In fabricating a prosthodontic custom tray, what will surely result from failing to block out undercuts on the cast? -- Answer โโ Damaged cast or tray Although a mouth guard does not prevent the teeth from fracturing, it does -- Answer โโ Prevent teeth fragments from damaging the oral tissue The buccal flange of a mouth guard normally extends to the -- Answer โโ Point where soft tissue meets the attached gingival The level of maintenance that includes actions relating to proper operation, daily inspection, cleaning, simple lubrication, and minor exterior repair and operational adjustment of equipment is called -- Answer โโ User Inspecting, servicing, lubricating, adjusting, repairing, calibrating, modifying, and replacing parts of assemblies and subassemblies are included in what level of maintenance? -- Answer โโ Organizational
Major repairs, overhauls, rebuilding of components and subassemblies, and manufacture of parts are normally limited to what level of maintenance? -- Answer โโ Depot What level of maintenance includes the systematic care, servicing, and inspecting of equipment, and detection and correction of all minor faults before they develop into major defects? -- Answer โโ Preventive What type of maintenance involves troubleshooting to isolate the cause of equipment malfunction, and replacing or adjusting components or subsystems to restore normal function, safety, performance, and reliability of medical equipment? -- Answer โโ Unscheduled How can you stop a dental chair once the preposition or auto return switch is activated? -- Answer โโ Press any other switch or the safety stop plate What must you do if the preset positions of the preposition or auto return switches on the dental chair are not correct for treatment? -- Answer โโ Consult the manufacturer's instructions and adjust them What feature allows the dental chair to rotate to approx. 45 degrees from either side of the center and lock in position? -- Answer โโ Swivel/brake Repairing or replacing the inner workings of the dental chair's hydraulic and electrical systems is done by the -- Answer โโ BMET What dental unit system is affected by a malfunctioning water system? -- Answer โโ 3 - way syringe and hand piece water spray only The central vacuum system requires what maintenance action be done after each patient? -- Answer โโ Draw clean water through the HVE and saliva ejector to clear any debris, rinse with water, and then draw air through the system for a few seconds to clear all water from the hoses The dental unit's HVE works on the principle of -- Answer โโ Low pressure and high volume
Which dentist receives referrals for the most difficult cases requiring replacement of missing teeth? -- Answer โโ Prosthodontist What factors influence the scheduling of prosthodontic patients for treatment? -- Answer โโ Procedures to be done during the appointment and laboratory time required between appointments What should you do if you are uncertain about the time allocation for various prosthodontic procedures? -- Answer โโ Ask the dentist and coordinate with the laboratory When smoothing wax in the dental laboratory, which is the best instrument to use? -- Answer โโ Roach carver Which prosthodontic knife do you use to trim impression wax and requires an extremely sharp cutting edge? -- Answer โโ Compound Which prosthodontic knife do you use to trim and chisel impression compounds? -- Answer โโ Plaster Always use the wrapper to protect the bulb when installing it into the dental light in order to -- Answer โโ Guard the bulb from collecting finger oils that can affect performance and bulb life Which low-speed hand piece attachment uses rotary instruments with a smooth shank 1 1/2 inches in length? -- Answer โโ Straight attachment Which low-speed hand piece attachment uses a notched, short shank, 1/2 inch rotary instrument? -- Answer โโ Latch contra-angle Which hand piece is used in cavity preps to remove bulk of enamel, dentin, and old metal restorations? -- Answer โโ High speed
Which statement does not apply to the proper maintenance of the high-speed hand piece? -- Answer โโ The manufacturer's instructions contain info on lubrication requirements only Which statement about using fiber optics in dentistry does not apply? -- Answer โโ Eye strain and fatigue are increased How do you clean the hand piece's fiber optics surfaces? -- Answer โโ Wet a cotton swab with isopropyl alcohol and use it on both ends of the hand piece before sterilization Which hand piece is portable, lightweight, and has variable speeds of 2,500 to 25, rpm? -- Answer โโ Electric How often should mobile chair caster bearings be lubricated? -- Answer โโ Monthly To remove objects that have fallen through the prong opening of an amalgamator, -- Answer โโ Unplug the unit, turn it upside down, and gently rotate it back and forth When using the VLC unit, the high intensity light radiation emitted requires -- Answer โโ Patients and staff to wear protective glasses that match the unit's radiation output Where is the tympanic thermometer placed in order to record a patient's temperature? -- Answer โโ In the ear Before a patient's appointment, both you and the dentist screen the patient's dental health record for all of the following reasons except: A. reviewing AF Form 696 for positive entries B. determining what procedures will be performed during patient treatment C. checking for communicable diseases to determine the level of infection control required D. checking currency of information, record completeness, and x-rays required for the procedure -- Answer โโ C. checking for communicable diseases to determine the level of infection control required
What should be readily available for patients with severe emphysema? -- Answer โโ Supplemental oxygen What is required before patients with active tuberculosis can receive non-emergency (routine) dental treatment? -- Answer โโ Clearance by Public Health You suspect a patient is experiencing insulin shock. In this situation you would administer -- Answer โโ A source of sugar When a patient indicates a history of kidney trouble, it is important that you identify if this patient has had -- Answer โโ A kidney transplant, severe renal disease, and dialysis treatment What disease is usually associated with an excess of bilirubin causing the skin and eyes to turn yellow? -- Answer โโ Liver Which hepatitis types are transmitted by viruses and have carrier states? -- Answer โโ Hepatitis B and Hepatitis C What type of dental treatment can be provided for a patient undergoing chemotherapy? -- Answer โโ Emergency For pregnant patients, what trimester is considered the best time to provide dental treatment? -- Answer โโ Second Dental clinics support which of these medical objectives of the hypertension screening program? -- Answer โโ Early detection, evaluation, and treatment of hypertension The patient's blood pressure reading is routinely recorded -- Answer โโ Only on the AF IMT 696 What is the working part of a condensing dental instrument? -- Answer โโ Nib The identification number of a double-ended dental instrument is usually found -- Answer โโ Near the center
The width, length, angle, and sometimes the angle or curvature of a dental instrument blade is described by the -- Answer โโ Formula number Which instrument is used to detect minute breaks in the pits and fissures, find defective margins or restorations, and check the depth of cavities? -- Answer โโ Explorer Store anesthetic carpules -- Answer โโ At room temperature To make the necessary spaced holes in a rubber damn, you would use the rubber damn -- Answer โโ Punch Which rubber damn clamp sizes are commonly used in pediatric dentistry? -- Answer โโ #00, #W00, and # The instrument commonly referred to as a Boley gauge is the -- Answer โโ Vernier caliper Which type of gauge is available with sharp points for porcelain and metal, and rounded points for wax and plastic? -- Answer โโ Iwanson spring caliper? Which part of a bur fits into a hand piece? -- Answer โโ Shank A disadvantage of a carbide bur is that it -- Answer โโ Is brittle and has a tendency to fracture under pressure Which numbers identify straight crosscut fissure burs? -- Answer โโ 556, 557, 558, 559, and 560 Which bur is best suited for making undercuts in cavity preparation? -- Answer โโ Inverted cone What is the shape of a #6 finishing bur? -- Answer โโ Concave, tapered fissure
Instruments becoming tangled during the instrument exchange are usually caused by a failure to -- Answer โโ Parallel the handles before the exchange The proper sequence for assembling the aspirating syringe is to -- Answer โโ Insert the carpule with the rubber stopper end in first, positioned toward the plunger, then attach the needle and engage the piston rod The disassembly sequence for the aspirating syringe is to -- Answer โโ Disengage the harpoon, remove the cartridge, and remove the needle Which of the following is used for irrigation during routine dental restorative procedures? -- Answer โโ Water or water spray from the dental unit's 3-way syringe To remove a large volume of fluid from an oral cavity without exerting injurious suction pressure to oral soft tissue, you would use -- Answer โโ A high volume evacuator What technique draws the hand piece water spray across the tooth keeping the tooth cool and the cavity prep clear of debris? -- Answer โโ Washed field What type of pressure do you apply to tissue you are retracting? -- Answer โโ Firm enough to prevent slippage To prevent the patient from aspirating or swallowing the rubber dam clamp, you use -- Answer โโ A ligature The rubber dam clamp is placed onto the rubber damn forceps with the bow of the clamp facing -- Answer โโ Upward and away from the forceps To invert the rubber dam on the facial and lingual areas of the exposed teeth, you would use -- Answer โโ A dull instrument When removing the rubber dam, remove the septa by -- Answer โโ Cutting each septum from the facial aspect and pulling the dam lingually
In dentistry, preliminary impressions are used to fabricate -- Answer โโ Study casts, orthodontic casts, custom trays, and mouth guards What affect does heat have on alginate impression material? -- Answer โโ Accelerates the set When making a preliminary impression, patients should be -- Answer โโ Upright with their head against the headrest and their occlusal plane parallel to the floor What instructions do you give to the patient regarding the preliminary impression procedure? -- Answer โโ Remove removable dental prosthesis; rinse their mouths with an antiseptic mouth rinse; refrain from talking; if they are uncomfortable , have them raise a hand to let you know; tilt their heads forward; and breather through the nose to prevent gagging How much space must be between the rim-lock impression tray and the occlusal or incisal edges of the teeth? -- Answer โโ 2 to 3 mm To remove blood, mucous, and saliva from an alginate impression and ensure good surface detail, you... -- Answer โโ Clean and rinse the impression under cool tap water and shake to remove excess water While you are making maxillary impressions, have the patient lean forward to -- Answer โโ Prevent the material from running down the patient's throat To properly make a maxillary impression your first contact of the impression material is made -- Answer โโ Over the maxillary tuberosity and posterior teeth To remove the maxillary impression from the patient's mouth, you -- Answer โโ insert your finger facially and push down at the third molar area Which procedure best describes how to position the dental chair and unit when dismissing the patient? -- Answer โโ Move the dental light and bracket tray out of the way; lower the chair, and move the arm of the chair
Which amalgam matrix bands have aprons? -- Answer โโ #2 and # What size is the universal or straight amalgam matrix band? -- Answer โโ # Which of the following is not a use of matrix crowns? -- Answer โโ Used as a permanent restoration What does the dentists use to force a matrix band or strip tightly against irregular tooth surfaces to eliminate space that could result in an overhanging restoration? -- Answer โโ Wedge What device is used to make a hole in the dentin portion of a tooth to receive pins of appropriate size? -- Answer โโ Pin drill The instruments used to pack amalgam into the cavity prep are called -- Answer โโ Condensers Which instrument is used to shape, form, or cut tooth anatomy into amalgam restoration? -- Answer โโ Carver Which instrument is designed for carving proximal surfaces? -- Answer โโ #1/ Hollenback Which cavity involves two surfaces of the tooth? -- Answer โโ Compound Which dental pliers, commonly called three-prong pliers, do you use for wire and clasp bending? -- Answer โโ #201 Adere When tooth cusps or most of the tooth crown must be removed, how is retention obtained? -- Answer โโ Threaded pins What is the final step in cavity prep? -- Answer โโ Cleansing the cavity
Which dental procedure step requires the use of more instruments, causing instrument transfers to occur more rapidly? -- Answer โโ Placement of the restorative materials During the procedure, when are amalgam matrices -- Answer โโ
