Both have a rounded tip that must be maintained during
sharpening (except the McCall #13/14).
When using a stationary stone, hold the curette in a
modified pen grasp and establish a finger rest at the
edge of the stone. Draw the side of the blade toward
you. Because the curette is curved, you must repeat this
process until the entire arc of the cutting edge is
sharpened. Be sure to lubricate the stone during the
When sharpening a curette on a mounted stone, be
sure the wheel rotates away from the side of the blade.
PERIODONTAL CHISEL SHARPENING
The No. 1 and No. 2 Ochsenbein chisels are the
most commonly used periodontal chisels. They have
three cutting edges, a flat edge on the tip and a curved
edge on each side of the tip. The edges to be sharpened
are up, toward you, on the convex side of the chisel
head. The cutting edges on the No. 1 Ochsenbein are
reversed. They are on the concave side of the head.
Another commonly used chisel, the TGO chisel, is a
smaller version of the Ochsenbein chisel. Follow these
steps when sharpening a periodontal chisel:
the tip of the chisel. Position the blade on the stone at an
angle conforming to the bevel of the blade. Push the
blade across the stone in the direction of the cutting
Use a flat Arkansas stone to sharpen the edge on
Use a cylindrical sharpening stone or one with
rounded edges to sharpen the curved edges on the sides
of the chisel head. Position the stone on the blade at an
angle consistent with the bevel of the blade. Twist or
rotate the stone until the edge is sharp.
DO NOT rotate the sharpening stone over the
cutting edge, it will round and dull the edge.
Sickle scalers and hoes are the most commonly
used scaling instruments. Sickle scalers have two
cutting edges that form a point where the facial and
lateral surfaces meet (figure 6-18). Sharpen the sickle
scaler by grinding the facial and lateral surfaces on a
stationary stone being careful to maintain the sharp
To sharpen the facial surface, hold the edge flat
against the side of the stone and draw the instrument
back and forth.
To sharpen the lateral surface, position the surface
against the stone and draw the instrument across the
stone in the direction of the cutting edge. Repeat this
procedure until both lateral surfaces are sharp.
A hoe scaler has only one edge. Sharpen the hoe by
grinding only the outer surface of the cutting edge. The
outer surface and inner blade surfaces form a 45°
angle, so you must maintain this angle against the
stone. Draw the instrument across the stone in the
direction of the cutting edge. Repeat this procedure
until the edge is sharp.
Figure 6-18.Sickle sealer: A. Tip of sickle sealer; B. Cross