Hand instrument identification, ultrasonic scaler use, and proper scaling stroke technique for dental hygienists.
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- What are the three parts of a periodontal hand instrument?
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Handle, shank, and working end.- What is the terminal shank?
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The part of the shank closest to the working end; it determines the instrument's angulation to the tooth.- What shape is the cross-section of a sickle scaler blade?
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Triangular, with a pointed back and pointed tip.- What shape is the cross-section of a curette blade?
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Semicircular, with a rounded back and rounded toe.- Where can a sickle scaler safely be used?
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Supragingivally only, above the gumline.- Why is a sickle scaler not used subgingivally?
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Its pointed tip and back can traumatize soft tissue.- How many cutting edges does a universal curette have?
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Two, one on each side of the blade.- How many functional cutting edges does a Gracey curette have per working end?
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One.- What makes a Gracey curette's blade offset?
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The blade is angled about 60 to 70 degrees from the terminal shank so only one edge contacts the tooth.- What tooth surfaces are Gracey 1/2 curettes designed for?
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Anterior teeth.- What tooth surfaces are Gracey 11/12 curettes designed for?
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Mesial surfaces of posterior teeth.- What tooth surfaces are Gracey 13/14 curettes designed for?
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Distal surfaces of posterior teeth.- What is a dental explorer used for?
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Detecting calculus deposits and tooth surface irregularities, not removing calculus.- What is a periodontal probe used to measure?
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Pocket or sulcus depth.- What is the face of a curette blade?
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The flat internal surface located between the two cutting edges.
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