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?
- Handle, shank, and working end.
- What is the terminal shank?
- 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?
- Triangular, with a pointed back and pointed tip.
- What shape is the cross-section of a curette blade?
- Semicircular, with a rounded back and rounded toe.
- Where can a sickle scaler safely be used?
- Supragingivally only, above the gumline.
- Why is a sickle scaler not used subgingivally?
- Its pointed tip and back can traumatize soft tissue.
- How many cutting edges does a universal curette have?
- Two, one on each side of the blade.
- How many functional cutting edges does a Gracey curette have per working end?
- One.
- What makes a Gracey curette's blade offset?
- 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?
- Anterior teeth.
- What tooth surfaces are Gracey 11/12 curettes designed for?
- Mesial surfaces of posterior teeth.
- What tooth surfaces are Gracey 13/14 curettes designed for?
- Distal surfaces of posterior teeth.
- What is a dental explorer used for?
- Detecting calculus deposits and tooth surface irregularities, not removing calculus.
- What is a periodontal probe used to measure?
- Pocket or sulcus depth.
- What is the face of a curette blade?
- The flat internal surface located between the two cutting edges.