Remove the final cemented abutment and soft tissue (Fig.14 black area) and use 3 types of Titanium brush (including I and R brush) to clean implant threads.  Place a cover screw with 2 mm cuff for easy uncover later.  Pack sticky bone (Fig.15 red) in the defect tight with an Amalgam condenser and Bicon Sinus Lift Instrument, cover the opening with PRF and suture with PGA.

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Xin Wei, DDS, PhD, MS 1st edition 02/27/2020, last revision 03/15/2020