Figure 4-19.Two styles of rubber dam punches.
tooth, a rubber dam clamp is used. These clamps are
made of spring steel in various sizes (fig. 4-20) to fit
the general contours of the different teeth. You will
need to know some of the commonly used clamps and
their area of use, which are shown in table 4-1.
Clamps commonly used in pediatric dentistry
include the #2, #4, #8A, and #14A. Clamps with "W"
prefixes, such as the #W8A or W3, indicate that the
clamps are without wings on the outer portions
opposite the holes.
Table 4-1.Commonly Used Rubber Dam Clamps and
Their Area of Use
Area of use in the mouth
Bicuspids and small molars
Partially erupted molars
Figure 4-20.Rubber dam clamps.
The space between the gripping edges of the clamp
is narrower than the diameter of the corresponding
tooth. Thus, to place the clamp around the tooth, it is
necessary to spread the gripping edges wider than the
tooth's diameter. To spread the gripping edges, rubber
dam clamp forceps are used.
Rubber Dam Forceps
The rubber dam clamp forceps (fig. 4-21) are
designed to spread the two working ends of the forceps
apart when the handles are squeezed together. The