Why the Recession on 11?
This patient is concerned about the dark line at the cervical of #11 (above). I am usually very kind to tissue when I use retraction cord and she also had healthy tissue at the time of the impression. The provisional (below) had its cervical margin just tucked under the tissue.
Notice the bluish tinge to the tissue; the discoloration is partly due to root discoloration from an older endodontic treatment. However, even though the tissue was healthy the sulcus depth was 3mm and the tissue was very thin.
A deep sulcus with healthy bone and tissue is the most predictable for a gingivectomy. Unfortunately, it is also the most susceptible to recession. I thought I was gentle, yet it appears I wasn’t gentle enough. I was saved only by a low lip line.