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Figure 12: This is the Razor ® Carbide bur from Axis Dental, my
favorite bur for cutting through PFM crowns. The Razor even cuts
well on those metal substructures we see on patients who went
to Mexico to have their dentistry done. It feels like you are cutting
through a 1950’s Chevy bumper when replacing those types of restorations.
The Razor cuts through porcelain as well, so it’s the only
bur I ever need to get through a PFM.
Figure 13: What’s not to love about the 90-degree angle of the
Christensen Crown Remover (Hu-Friedy; Chicago, Ill.)? I’ve owned
this one for at least 15 years and it still looks like it did the first time
I used it. It’s a good thing Hu-Friedy’s scalers and explorers need to
be replaced, otherwise they might put themselves out of business!
Figure 14: This is a better shot of the Razor Carbide bur going
though the porcelain of a PFM we are replacing. I used to use a
diamond bur to cut through the porcelain and would then switch to
a carbide to cut through the metal coping. But with the Razor, it’s
one and done. It even has a reinforced shank to prevent breakage.
Figure 15: Sometimes when I use the Christensen Crown Remover
to open a crown, it still won’t come off because of the contacts.
Rather than cutting through the lingual portion, I try to grab the
coping with my hemostats and do my best to wiggle it off. Having
cut off many high-strength, all-ceramic crowns, I will never again
complain about cutting off a PFM.
Another Use for Anterior BruxZir Solid Zirconia Restorations27