Unit 6 Periodontology OSCE - Instruments (from Dental Hygiene notes)Correct 100% .
Gracey - advantages (4) - disadvantages (2) - ANSWERADVANTAGES - subgingival use w/o trauma - adapts to convex root surfaces/concavities - enhanced adaptation - self angulated working cutting edge
DISADVANTAGES - wider tip = difficult to adapt to proximal surfaces - one working cutting edge = frequent instrument change
Sickle Scaler - advantages (3) - disadvantages (4) - ANSWERADVANTAGES - strong, bulky working end - good access to proximal surfaces - efficient = two cutting edges per working end
DISADVANTAGES - can't use subgingival - sharp point - adapts poorly to round surfaces - level cutting edge = must tilt shank toward tooth for correct angulation
List contraindications for Ultrasonic instrumentation - systemic conditions (5) - oral conditions (4) - children (1) - ANSWERSYSTEMIC CONDITIONS - communicable disease - susceptibility to infection - respiratory risk (chronic pulmonary disease) - difficulty swallowing - pacemaker (not-shielded)
ORAL CONDITIONS - demineralised caries - exposed dentinal surfaces - restorations - implants
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