Fig.8: Immediately post placement of a 5x17 mm implant at the site of #20.

The apex of the original socket of #20 extends from the upper 3rd thread to the lower 3rd thread.

Fig.9: Five months postop.  The apex of the original socket not only decreases mesiodistally, but also vertically (from the upper 5th thread to the lower 5th thread).

There is mild crestal bone resorption distal to the implant at the site of #20 five (Fig.9) and 12 (Fig.13) months postop.  It may be related to the change in the trajectory.

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Xin Wei, DDS, PhD, MS 1st edition 07/22/2014, last revision 01/19/2018