It appears that 3 of the slots (Fig.9 *) on the abutment (A) contribute to retention of the dressing.  The gingival margin is rough (<).  Why?

I: implant.  The buccal swelling disappears.  There is no sign of buccal plate atrophy.

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Xin Wei, DDS, PhD, MS 1st edition 09/12/2014, last revision 02/13/2015