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Figure 38: The margin has now been
recontoured with the 856-025 fine bur. Again,
the speed can be turned down to 2,000 rpm to
avoid overheating the tooth. In my experience, I
can clearly visualize the margin only if I turn the
water off to see what I am doing. Now that I have
dropped the prep margin down to the gingival
margin with both cords in place, the resulting
facial margin will now be approximately 1 mm
subgingival. I typically do this in cases with a
dark prep shade to keep the dark shade from
showing through.
Figure 39: Now we place two ROEKO
Comprecap Anatomic compression caps
(Coltène/Whaledent) onto the preps, and have
the patient bite down for 8 to 10 minutes. This
time frame is really not negotiable, as these
compression caps work wonders if given
enough time. Because they are “anatomic,”
there is a cutout on the mesial and distal of each
cap to prevent the interproximal papilla from
getting blunted. We moisten the inside of the
Comprecaps before placing them on the teeth
so that when we remove them, we don’t have
cotton fibers sticking to the prep. Comprecaps
are a great way to prevent bleeding during the
impression process.
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Figure 40: After waiting 8 to 10 minutes, we
remove the Comprecaps and then the top cord
from the sulcus. We can expect no bleeding
nearly all of the time thanks to the attention
we have given the gingiva throughout the prep
sequence. When you add in the epi strand in
the top cord and the pressure hemostasis from
the Comprecaps, it should not be surprising
that there is no bleeding at this stage. Quality
restorative dentistry is more dependent on a
great impression than a great preparation, so
this is the moment of truth!
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