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var D = {“flashcards”:[{“front”:”What tip motion does a magnetostrictive unit produce?”,”back”:”Elliptical, with all sides of the tip active.”},{“front”:”What tip motion does a piezoelectric unit produce?”,”back”:”Linear, back-and-forth, with primarily the lateral sides active.”},{“front”:”Why is lavage important during ultrasonic use?”,”back”:”Cools the tip and flushes debris from the pocket.”},{“front”:”When is aerosol generated during ultrasonic use?”,”back”:”The entire time the tip contacts a wet field, not only during active strokes.”},{“front”:”What tip type suits subgingival maintenance?”,”back”:”Thin, precision, or periodontal tip at low power.”},{“front”:”Should modern shielded pacemakers automatically contraindicate ultrasonic use?”,”back”:”No — confirm current device shielding and manufacturer guidance rather than assuming.”},{“front”:”What reduces aerosol exposure most effectively?”,”back”:”High-volume evacuation positioned close to the working field for the full procedure.”},{“front”:”What tip type suits heavy supragingival calculus?”,”back”:”Standard/beavertail tip at higher power.”},{“front”:”Why might piezoelectric units be favoured over magnetostrictive?”,”back”:”Typically quieter and generate less heat at comparable settings.”},{“front”:”What should never be reduced to save appointment time?”,”back”:”Lavage/water flow during powered instrumentation.”}],”quiz”:[{“q”:”Magnetostrictive units produce tip motion that is:”,”options”:[“Linear only”,”Elliptical, all sides active”,”No motion”,”Circular only, one side”],”answer”:1,”exp”:”Magnetostrictive tips move elliptically.”},{“q”:”Piezoelectric units produce tip motion that is:”,”options”:[“Elliptical”,”Linear, lateral sides active”,”Random”,”Vertical only”],”answer”:1,”exp”:”Piezoelectric tips move linearly.”},{“q”:”Aerosol generation during ultrasonic use occurs:”,”options”:[“Only during visible debris removal”,”Throughout wet-field contact, continuously”,”Never”,”Only at the start”],”answer”:1,”exp”:”Aerosol is continuous during wet-field contact.”},{“q”:”A thin, precision tip is best used for:”,”options”:[“Heavy supragingival calculus”,”Subgingival maintenance/light deposits”,”Never used clinically”,”Only anterior teeth”],”answer”:1,”exp”:”Thin tips suit subgingival, lighter work.”},{“q”:”Cardiac pacemaker patients and ultrasonic use should be managed by:”,”options”:[“Automatic avoidance in all cases”,”Confirming current device shielding status first”,”Ignoring the history”,”Using maximum power regardless”],”answer”:1,”exp”:”Confirm shielding status rather than assuming contraindication.”},{“q”:”The most effective aerosol reduction measure is:”,”options”:[“Reducing lavage”,”High-volume evacuation close to the working field”,”Working faster only”,”Avoiding PPE”],”answer”:1,”exp”:”HVE positioned correctly is most effective.”},{“q”:”Heavier, well-attached calculus generally requires:”,”options”:[“Lower power, thin tip”,”Higher power, standard tip”,”No power setting change”,”Air polishing only”],”answer”:1,”exp”:”Heavier deposits need higher power/standard tip.”},{“q”:”Piezoelectric units are often favoured for:”,”options”:[“Louder operation”,”Quieter operation and lower heat generation”,”Higher heat generation”,”No difference from magnetostrictive”],”answer”:1,”exp”:”Piezoelectric units are typically quieter/cooler.”},{“q”:”Reducing lavage to save time risks:”,”options”:[“Improved cooling”,”Tip overheating and reduced debris flushing”,”No consequence”,”Better outcomes”],”answer”:1,”exp”:”Reduced lavage risks overheating and poor debris removal.”},{“q”:”Contraindication screening for powered instrumentation should include:”,”options”:[“Cardiac device status and communicable respiratory disease”,”Only tooth number”,”Only patient age”,”Only insurance status”],”answer”:0,”exp”:”Device status and respiratory disease are key screens.”},{“q”:”Air polishing is generally indicated for:”,”options”:[“Removing heavy calculus”,”Removing biofilm and light stain”,”Root planing”,”Anaesthesia delivery”],”answer”:1,”exp”:”Air polishing suits biofilm/stain removal, not heavy calculus.”},{“q”:”A standard/beavertail tip is generally too large/rigid for:”,”options”:[“Supragingival use”,”Safe subgingival use”,”Any clinical use”,”Air polishing”],”answer”:1,”exp”:”Standard tips are typically unsuitable for subgingival use.”},{“q”:”No water flow at an ultrasonic tip most likely indicates:”,”options”:[“Correct function”,”A blocked line or empty reservoir”,”Excessive power setting”,”Correct tip selection”],”answer”:1,”exp”:”Blocked lines or empty reservoirs cause no flow.”},{“q”:”Magnetostrictive units generally generate:”,”options”:[“Less heat than piezoelectric”,”More heat than piezoelectric, needing more cooling attention”,”No heat”,”Only cold output”],”answer”:1,”exp”:”Magnetostrictive units typically run hotter.”},{“q”:”PPE for aerosol management should be maintained:”,”options”:[“Only during heavy debris removal”,”For the full duration of powered instrument use”,”Only at the start”,”Not necessary if patient is healthy”],”answer”:1,”exp”:”PPE should be consistent throughout the procedure.”},{“q”:”A patient with a strong aversion to ultrasonic sensation might warrant:”,”options”:[“Forced continuation regardless”,”An alternative hand-instrumentation approach”,”No alternative offered”,”Ignoring patient preference”],”answer”:1,”exp”:”Patient comfort/preference can warrant an alternative approach.”},{“q”:”Adequate lavage is confirmed visually by:”,”options”:[“No water at all”,”A visible steady flow around the tip”,”Only patient report”,”Sound alone”],”answer”:1,”exp”:”Visible flow confirms adequate lavage.”},{“q”:”Power setting selection should be based primarily on:”,”options”:[“Appointment time available”,”Deposit tenacity and location”,”Patient’s insurance”,”Random choice”],”answer”:1,”exp”:”Deposit characteristics guide power selection.”},{“q”:”Which is a correct troubleshooting step for excessive tip heat?”,”options”:[“Check and ensure adequate water flow”,”Increase power further”,”Ignore it”,”Remove water flow entirely”],”answer”:0,”exp”:”Checking water flow addresses overheating.”},{“q”:”The clinical reasoning for confirming pacemaker shielding before ultrasonic use reflects:”,”options”:[“Outdated blanket rules should be updated with current device information”,”All pacemakers are always unsafe”,”No verification is ever needed”,”Ultrasonic use is always contraindicated”],”answer”:0,”exp”:”Current verification replaces outdated blanket assumptions.”}]};
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