Fig.6: immediately after placement of 7x17 mm implant (I).  It appears that no bone contacts the 1st three threads distally (*).

It does not look the same way 3 months 3 weeks postop (Fig.7 white arrowheads).  This group of bone fragment may meet the bone indicated by red arrowheads to form the distal socket in the near future.

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Xin Wei, DDS, PhD, MS 1st edition 10/13/2013, last revision 03/24/2018