PDF Version - Glidewell Dental Labs

Figure 11: Because of the pressure that is
generated with any PDL injection, if you move
the needle to reposition it, anesthetic will squirt
out that we don’t want the patient to taste.
Likewise, when we finish the injection and
remove the needle, anesthetic will squirt out
again. As shown here, my assistant places a
saliva ejector next to the insertion point to make
sure that when the anesthetic spills out, she is
able to control it. A cotton roll placed next to the
needle tip can serve the same purpose.
11
Figure 12: Another benefit of the STA device
is the nature of the syringe itself. In order to
inject with a typical syringe, the thumb, index
and middle fingers must be in predetermined
positions to generate the force to express the
anesthetic. With the STA device, you are able to
grasp the syringe at any point along its length,
so I typically hold it much closer to the tip, as
shown here. This gives me a greater degree of
control and assists me in rolling the syringe if I
need to reorient the bevel.
12
Figure 13: The fastest way I’ve found to remove
an existing PFM is to use an aggressive carbide
like the Razor ® Carbide bur (Axis Dental;
Coppell, Texas). This bur easily cuts through the
ceramic material and the metal substructure.
In the past, I would use an old diamond to cut
though the porcelain material and would then
switch to a carbide to cut through the metal
substructure. The Razor Carbide does the job of
both of these burs and can be used with a light
touch when cutting through the metal, so as not
to inadvertently damage the tooth underneath.
13
Photo Essay: The Pursuit of BruxZir Anterior Esthetics19