CBCT is taken a few days after implant loss at #29 (Fig.1, ~5 years post placement).
Since the implant at #29 is placed apically, an abutment with 4 or 5 mm cuff will be used. The mesial crestal bone may have to be trimmed prior to abutment placement.
If the implant at #30 is nonsalvageable, the new implant should be placed more distal than designed and more or less parallel to the implant at #31.
Xin Wei, DDS, PhD, MS 1st edition 11/06/2016, last revision 07/04/2018