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Figure 14: Once the prep is exposed, I use a
Christensen Crown Remover (Hu-Friedy; Chicago,
Ill.) to loosen the crown. You will notice
that I do not cut through the metal coping at
the gingival margin. Too often when I try to cut
through that last strap of metal, I inadvertently
tear up the facial tissue in the one area where I
would like to have very healthy tissue. Using the
Christensen Crown Remover, I can usually rock
the crown loose without having to cut through
the last strip of metal.
Figure 15: Now that the crown on tooth #9
has been removed, we can start prepping
tooth #8. Because this tooth has not yet been
prepared, I am able to take advantage of the
Reverse Preparation Technique. The mesial
contact is already broken from when I removed
the adjacent crown, so I now break the distal
contact with a #55 bur as you can see here. The
reason we break the contacts first is because
this technique requires the first retraction cord
to be placed immediately.
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Figure 16: The first cord I use is an Ultrapak
cord #00 (Ultradent; South Jordan, Utah). This
is a plain cord that has not been soaked in any
medicaments, and I literally floss it into place on
the mesial and distal as though it were dental
floss. With the two interproximal portions of the
cord locked into place, I now pack the facial
segment subgingivally.
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