The septum is almost non-existent; the palatal wall is low, while the sinus floor is present.  Sticky bone is placed first against the defective palatal wall and presumably pushed as high as to the sinus floor (Fig.4 *).  PRF plug/membrane and 6-month membrane are used to close the socket with 4-0 Chromic gut suture apparently securely, followed by periodontal dressing.

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Xin Wei, DDS, PhD, MS 1st edition 05/22/2019, last revision 05/22/2019