Instruments and Principles for instrumentation (Chapter 38)

Question 1

what is the angulation for scalers and curettes

Answer 1

• Angle formed by the face at the cutting edge of the instrument with the surface to which the instrument is applied.

Question 2

what is lateral pressure?

Answer 2

• Pressure of the instrument against the tooth surface during activation. Described as light, moderate, or heavy pressure.

Question 3

Stroke characteristics: PULL

Answer 3

• Scaler removing calculus

Question 4

Stroke characteristics: PLACEMENT

Answer 4

• exploratory stroke when a curette is being

positioned.

Question 5

Stroke characteristics: COMBINED PUSH AND PULL

Answer 5

• explorer in a walking stroke, which is moving the instrument up and down with equal pressure on the surface.

Question 6

The assessment stroke is also called?

Answer 6

• exploratory stroke

Question 7

Assessment stroke

Answer 7

• Used to detect irregularities of the tooth surface such as the presence of calculus, a carious lesion, or a rough overhanging margin

Question 8

Diagonal or Oblique Stroke

Answer 8

• stroke that is diagonal across the surface being treated.

Question 9

Vertical Stroke

Answer 9

• strokes parallel with the long axis of the tooth being treated.

Question 10

Horizontal Stroke:

Answer 10

• strokes parallel with the occlusal surface of the tooth being treated. They are sometimes called circumferential, which should not be interpreted to mean that a stroke can be made to go around a tooth or large segment of
  a tooth. A horizontal stroke necessarily must be a short stroke

Question 11

Factors that influence selection of stroke

Answer 11

•Size, contour, and position of gingiva.
•Surface and section of surface where the instrument is
used.
•Probing depth.
•Size and shape of instrument used.
•Procedure objective, for example, nature of the deposit to be removed.

Question 12

Nature of Stroke

Answer 12

• The Grasp: of a scaler or curet is light while working end is positioned for the stroke, and then instrument is held more firmly during movement.
• Hand stability: during a stroke, the whole hand pivots or rotates on the fulcrum.
• Motion: The motion for a stroke is generated by a unified action of the shoulder, arm, wrist, and hand.
• Length: of the scaling stroke is limited by the extent of calculus deposit and by the anatomic features of the area where the deposit is located.